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Lenovo T420 remove BLACKLIST WIFI CARD??

Q: Lenovo T420 remove BLACKLIST WIFI CARD??

Hello!I just bought a Lenovo T420 without a WIFI -Card, Is there any way to remove this so i can use a 6235 Intel card instead of the 6205 which was in it originally?

RELEVANCY SCORE 200
Preferred Solution: Lenovo T420 remove BLACKLIST WIFI CARD??

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A: Lenovo T420 remove BLACKLIST WIFI CARD??

Welcome to the Lenovo Community!

Actually, it's not a blacklist, but a whitelist.Anyway, I suggest flashing this modified BIOS version: https://www.sendspace.com/file/0whb9r

In addition to the removed whitelist, it has several other advantages over the original BIOS.

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RELEVANCY SCORE 73.2

This is an open letter to Lenovo, but any feedback is welcome. Sir or Madam,   I'm hoping someone from Lenovo will read my concern, address this issue, and in all my expectations, resolve it.  After using 802.11AC in my macbook pro, I had to have it in my thinkpad. 802.11n just felt like 56k after that. Unfortunately, after install and power on, I got bios error 1802: unauthorized network card is plugged in. After doing some research, I learned that there's a list of 'approved' wifi cards, hard coded into the bios via hardware ID. For example, my OEM wifi card is an intel advanced-n 6205, but to windows and bios, the hardware id is 80861311. 8086 is the vendor id. 8086 for intel, get it? And the 1311 is the unique wifi card model ID. Incidentally, fixing this issue is really not all that complicated for me, since I happen to know how to do it. I  would need to decompress and disassemble the bios modules, find the check routine and modify it accordingly. Next, I would need to find the routine that computes and compares the checksum hashes, assuming your bios isnt encrypted/signed. All of this is pallatable when dealing with code on the order of megabytes, however, that's not really the point. I shouldn't need to do it. Modifying the bios is a precarious undertaking, even for someone who knows what they are doing. Most people don't possess this technical skill set and are directed in their research ... Read more

A:802.11 AC wifi card in T420

"because the company failed to take appropriate action?"Appropriate for whom?They have a business model. It includes locking out devices that might be compatible but that they didn't sell you.Don't expect that to change.

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RELEVANCY SCORE 72.4

OS - Windows 10 Professional - clean install a couple of days ago. I recently purchased a refurbished T420. When it arrived I was unable to view any of the wireless networks in my home. I looked in the device manager and I didn't see a wifi card, Fn+f5 wasn't bringing up the adapter settings, radio on/off wasn't working, etc. I took the back cover off the case and inside was a Sierra Wireless 3G card. I removed that card and uninstalled the device. I purchased an Intel Centrino Advanced-N 6205 card. Couple of issues... 1) It doesn't fit perfectly. As I am sure you know, the Sierra Wireless is twice as long as the 6205 so, when plugged in, the 6205 doesn't stretch the length of the previous device and thusly, I can only attach one of the two antena connectors. Additionally, I am unable to secure to the board because it won't reach the screw holes - so while it is in mPCIe slot, it still tracks to a 45 degree tilt. 2) The laptop doesn't see the card. I have scanned for hardware changes both through the device manager as well as on Lenovo's site and it's not showing up at all. It is also not showing up in the BIOS. I have downloaded and installed numerous drivers in an attempt to help it be seen, but none have worked. I believe the current one I have installed is: Wireless_19.20.0_PROSet64_Win10. I manually installed it through the legacy install program in the device manager but it seems unable to update the drivers. I have checked the 6205's FRU number agai... Read more

A:T420 Wifi Card Issues

Hello and welcome, SPinCharlotteT420 has separate slots for wwan (Sierra Gobi 3000 I assume, in your case) and wlan cards. The 1st one is located under the laptop bottom, the 2nd one is under the keyboard.Wlan card doesn't work and is invisible by BIOS/EC because of PCIe lanes it needs aren't routed in the wwan slot.Take a look at the T420 Hardware Maintenance Manual on the laptop's support page for details about laptop disassemble instructions to install new wlan card.

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RELEVANCY SCORE 72.4

Hi Everyone, I have a Thinkpad T420 and want to replace the wifi card in here. Currently it's an Intel Centrino Wireless-N 1000, single band. I don't really want to spend too much on the new card, hopefully around 5-10. Any suggestions for a better dual band card or better which won't need a Bios mod i.e. a card that will work with plug and play if there is such a thing and has a Windows 10 driver for it? Thanks in advance. 

A:Upgrade wifi card for T420

You can only use a card that was originly sold on the T420.  There are no dual band cards.

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RELEVANCY SCORE 72.4

I have T420 4178-83G with Windows 7. The machine does not recognize the installed WIFI card. it does not show up in the device manager and even if I search for neew HW it does not show up. Any clue?

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RELEVANCY SCORE 62.4

how do i remove my ip from the blacklist

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RELEVANCY SCORE 62

Dear Gary,
 
This topic is for pc2, where I found the virus word file that caused the blacklist on 10/12/2016 at 9am.
 
FRST.txt 
 
Scan result of Farbar Recovery Scan Tool (FRST) (x86) Version: 16-10-2016
Ran by 608a (administrator) on 608-PC (18-10-2016 20:00:24)
Running from C:\Users\608a\Desktop
Loaded Profiles: 608a (Available Profiles: 608a & 608)
Platform: Microsoft Windows 7 專業版  Service Pack 1 (X86) Language: 中文 (繁體台灣)
Internet Explorer Version 11 (Default browser: Chrome)
Boot Mode: Normal
Tutorial for Farbar Recovery Scan Tool: http://www.geekstogo.com/forum/topic/335081-frst-tutorial-how-to-use-farbar-recovery-scan-tool/
 
==================== Processes (Whitelisted) =================
 
(If an entry is included in the fixlist, the process will be closed. The file will not be moved.)
 
(Kaspersky Lab ZAO) C:\Program Files\Kaspersky Lab\Kaspersky Small Office Security 15.0.2\avp.exe
(Symantec Corporation) C:\Program Files\Symantec\pcAnywhere\awhost32.exe
() D:\SmartERP\DSCPatchAgent.exe
(Symantec Corporation) C:\Program Files\Symantec\pcAnywhere\awhprobe.exe
(TeamViewer GmbH) C:\Program Files\TeamViewer\Version9\TeamViewer_Service.exe
(Microsoft Corp.) C:\Program Files\Common Files\microsoft shared\Windows Live\WLIDSVC.EXE
(Microsoft Corp.) C:\Program Files\Common Files\microsoft shared\Windows Live\WLIDSVCM.EXE
(Kaspersky Lab ZAO) C:\Program Files\Kaspersky La... Read more

A:Remove CBL blacklist pc2 Requested by, and for Oh My!

Got it, thanks.

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RELEVANCY SCORE 62

Dear Gary,
 
This topic is for pc1.
 
FRST.txt       
 FRST.zip   9.77KB
  0 downloads  (Farbar Recovery Scan Tool)
Addition.txt   
 Addition.zip   7.65KB
  0 downloads  (Farbar Recovery Scan Tool) 
RK.txt           
 RK.zip   2.85KB
  0 downloads  (RogueKiller log)
 
 
Kind regards,
Hetty

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RELEVANCY SCORE 62

Dear Gary,
 
This topic is for pc1. 
 
FRST.txt 
 
Scan result of Farbar Recovery Scan Tool (FRST) (x86) Version: 16-10-2016
Ran by liao (administrator) on 601-PC (18-10-2016 13:32:02)
Running from C:\Users\liao\Desktop
Loaded Profiles: 601 & liao (Available Profiles: 601 & liao)
Platform: Microsoft Windows 7 專業版  Service Pack 1 (X86) Language: 中文 (繁體台灣)
Internet Explorer Version 11 (Default browser: Chrome)
Boot Mode: Normal
Tutorial for Farbar Recovery Scan Tool: http://www.geekstogo.com/forum/topic/335081-frst-tutorial-how-to-use-farbar-recovery-scan-tool/
 
==================== Processes (Whitelisted) =================
 
(If an entry is included in the fixlist, the process will be closed. The file will not be moved.)
 
(NVIDIA Corporation) C:\Windows\System32\nvvsvc.exe
(NVIDIA Corporation) C:\Program Files\NVIDIA Corporation\3D Vision\nvSCPAPISvr.exe
(NVIDIA Corporation) C:\Program Files\NVIDIA Corporation\Display\nvxdsync.exe
(NVIDIA Corporation) C:\Windows\System32\nvvsvc.exe
(Avira Operations GmbH & Co. KG) C:\Program Files\Avira\AntiVir Desktop\sched.exe
(Avira Operations GmbH & Co. KG) C:\Program Files\Avira\AntiVir Desktop\avguard.exe
(Kaspersky Lab ZAO) C:\Program Files\Kaspersky Lab\Kaspersky Small Office Security 15.0.2\avp.exe
(Symantec Corporation) C:\Program Files\Symantec\pcAnywhere\awhost32.exe
(Symantec Corporation) C:\Program Files\S... Read more

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RELEVANCY SCORE 62

Dear Gary,
 
Here I am posting about pc3.
(It's operating on Windows XP. It keeps crashing after running RogueKiller. So, cannot export RK file.)
 
FRST.txt
 
Scan result of Farbar Recovery Scan Tool (FRST) (x86) Version: 16-10-2016
Ran by 606a (administrator) on XP-606A (18-10-2016 15:28:51)
Running from C:\Documents and Settings\kelly\桌面
Loaded Profiles: 606a (Available Profiles: user & Administrator & 606a)
Platform: Microsoft Windows XP Professional Service Pack 3 (X86) Language: 中文 (台灣)
Internet Explorer Version 8 (Default browser: Chrome)
Boot Mode: Normal
Tutorial for Farbar Recovery Scan Tool: http://www.geekstogo.com/forum/topic/335081-frst-tutorial-how-to-use-farbar-recovery-scan-tool/
 
==================== Processes (Whitelisted) =================
 
(If an entry is included in the fixlist, the process will be closed. The file will not be moved.)
 
(Avira Operations GmbH & Co. KG) C:\Program Files\Avira\AntiVir Desktop\sched.exe
(Avira Operations GmbH & Co. KG) C:\Program Files\Avira\AntiVir Desktop\avguard.exe
(Apple Inc.) C:\Program Files\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
(Apple Inc.) C:\Program Files\Bonjour\mDNSResponder.exe
() D:\SmartERP\DSCPatchAgent.exe
(Oracle Corporation) C:\Program Files\Java\jre7\bin\jqs.exe
(VIA Technologies, Inc.) C:\WINDOWS\system32\KaraokeSer.exe
(Intel Corporation) C:\Program Files\Intel\Intel® Management ... Read more

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RELEVANCY SCORE 61.2

Dear Sir,
 
Thank you in advance for helping out.
I am not sure if it is safe to reveal my complete ip address so I put some ***.
If it's needed I will send you in private or secured message.
 
My ip has been listed on CBL (Spamhaus) blacklist since early August 2016.
I tried many things in below order:
1) Changed all mail accounts password.
2) Turned off mail server Open relay. 
3) Installed Kaspersky small office security to scan and deleted possible risky files (.dll .exe).
 
I delisted my ip for three times but it is relisted again.
Attached CBL lookup.pdf  is the most recent CBL lookup from http://www.abuseat.org/ . 
 
Please instruct me on what to do next to clean up this Kelihos virus, and delist from CBL, thank you.
 
 
On 9/14, 2016 I finally found a weird email, which shows one of our mail accounts (liao) is sending spam to itself !
Please see attached three pdf for more details.
 
 
 
 

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RELEVANCY SCORE 56.4

I have 2 questions but ill make 2 topics cause they are different issues. First... I accidentally broke connector on wifi card on my Lenovo G50-30. I found replacment card but I want to be sure it will work cause it looks a bit different. Im attaching 2 photos. Card in my hand is original card, and other one is replacment. The question is, will this replacment card work?

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RELEVANCY SCORE 56.4

Dear Lenovo Team I would like to ask if my Lenovo G510 laptop is compatible with "Intel Centrino Wireless-N 135 Wireless PCIe Half Mini Card With + BT 4.0" wifi card? https://www.aliexpress.com/item/Intel-Centrino-Wireless-N-135-Wireless-PCIe-Half-Mini-Card-With-BT-4... If I install the mentioned card above, will it work for sure? Yours faithfullyDaniel Udvardi

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RELEVANCY SCORE 56.4

Good afternoon, I have this card in my lenovo U 260: Bcm94313hmg2l WPEB - 121GNIt works very badly, almost does not have a good signal in any part. Very poor. The same bluethoot, is lost at 4 or 5 meters.By which other can I change it and improve the performance?Thank you

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RELEVANCY SCORE 56.4

Hi. I'm trying to replace my Broadcom wifi card with a better one. I'm not an expert in this kind of things, but I have read that I could have a better internet with another wifi card instaled...I searched few days on amazon (uk) and ebay, to find a suitable one, but...it seems to be more complicated than I though...Could anyone, please, provide a link from where I can buy one (as I have read, must be IBM/Lenovo compatible) I would much apreciate! Thank you very much indeed!

A:lenovo yoga 3 pro wifi card

Hi troubadour2012,
 
Welcome to the Community Forums.
 
As per hardware manual for a Lenovo YOGA 3 Pro-1370 (item 10 page 55) OEM recommended WLAN card:
 
10 Intel 7265 2x2AC+BT PCIE M.2 WLAN SAR NV Part number: SW10A1152210 Cbt BCM4352 2x2AC+BT4.0 PCIE M.2 WLAN Part number: 20200480
 
You may also verify compatible Wifi Card using your serial number here in the parts lookup page to check for current WLAN card and its substitute.
 
Lenovo medion can help you with the OEM parts, likewise using the part number from other resellers online.
 
Hope this help answer your query.
 
Regards

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RELEVANCY SCORE 56.4

Hello, My T420 has a hard time competing for bandwidth and I need to either replace the antenna or upgrade it.  I could use some advice on this and I thank Y'all in advance for your expertise. On my hotspot, connectivity is great.  I am the only user with the occasional visitor connecting with a mobile device.  However, at a friend's, my T420 can connect, but browsing is painfully slow.  There are five devices connected into friend's router:  1-apple TV; 2-iphone 5; 3-iphone 6S; 4-ipad; and, 5-Lenovo ThinkPad T420. I am aware that the stronger/est antennae captures the bandwidth.  So, at friend's location and when connecting to public wifi, I need a stronger antenna, it seems.  Please adivse.  Thank you.  

A:WiFi antenna on T420

If your antenna works at your hotspot, it works.  It cannot be upgraded, it is simply wires running around the outside of the lid. 
 
If it also is VERY slow at your friends heavily loaded router, it is probably just that the internet connection is overloaded

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RELEVANCY SCORE 56

The wifi card on the lenovo G505s isn't good at all and I tried to replace it with a spare one I had from a previous laptop but I got that error. "Unauthorized network card is plugged in - power off and remove the mini pci network card" Can someone link me to some sort of list of the wifi cards that are whitelisted by Lenovo so I can buy one of those? Or tell me another brand of wifi card that I can buy that wont give me this error. Thanks.

A:Replace wifi card on lenovo g505s

hi sm222,
 
Sorry to hear what happened,
 
The Wifi card that you should use should be on the whitelist and it should have a Lenovo FRU tag on it.
This is the list

 
Technically the model should match together with the Lenovo FRU tag
 
Regards
Solid Cruver
 



Did someone help you today? Press the star on the left to thank them with a Kudo!If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.Follow @LenovoForums on Twitter!

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RELEVANCY SCORE 56

Hi ,  Anyone knows if my laptop Lenovo G580 model 20150 can get a better wifi card than the actual one. the actual one is a Broadcom 802.11n Network Adapter. this mini pcie card has a 45Mbps speed and i need to improve it. My question is, what AC wifi card should i buy to have at least 150Mbps. Thanx

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RELEVANCY SCORE 56

Hello, I have a problem with the instalation new wifi card to my PC. I bought the card Intel Wireless N 1000, (Is it a supported wifi card to M93p) but after the instalation I tried turn on the PC, but on the display was displayed the "error 1802 Unautorized network card".Does anyone know what the problem is?thank youMartin

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RELEVANCY SCORE 55.2

Good morning guys i just receive my laptop and i have to say.... what a machine for the price.  Great specs and im reallying enjoying it. I use this for work and sometime gaming. the thing is i notice some problems with the wifi. Laggy and some connection losses,in different wifi networks. i also update every drivers available. still the same. i wonder if i can swap my wifi card for a new and better one. I was looking for the intel card 9560 with bluetooth 5.  if not this one what is the better and compatible for this laptop.  Thanks in advance

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RELEVANCY SCORE 55.2

Hi All, I'd like to know what socket type for the G50-70 wifi card slot is.  Can anyone verify if it is a Mini PCI-E slot (I doubt that it is) http://thumbs.ebaystatic.com/images/g/RfEAAOSwzgRWuxwK/s-l225.jpg Thanks EDIT: I just found out it's NGFF socket. The wifi card will use NGFF socket.










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A:SOLVED Lenovo G50-70 wifi card socket type

The socket that your WiFi card is occuping is a Mini PCIE slot, but it will not accept other devices than what is listed as an upgrade for your existing card in the "white list".  You can view your list of upgrades by looking at the parts listing for your notebook under the support tab of this site.
 
Here is a link to the Service Manual in PDF - will open in new tab when clicked:
 
Lenovo G50 series Manual
 
Look at the listing of WiFi parts on page 80 for what is available for use / upgrade.  Also - the included schematic may show something more of the socket as it really is good for detail looks when you zoom in tight.
 
Good luck.
 
CB
 
 

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RELEVANCY SCORE 55.2

hello guys, am new here can i replace my wifi card? And change it from intel to broadcom?mine is "? Intel Dual Band Wireless-AC 3165, 1x1, Wi-Fi + BT combo adapter, M.2 Card"and i want to replace it with Broadcom BCM4352can i replace it with any kind and model of broadcom or there are just 2-3 types that support my laptop :/please someone answerthanks i really appreciate your works guys

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RELEVANCY SCORE 55.2

HiI want change my wifi card. From manufacturer i have installed Inetl AC 3160. But i want change on AC 7260 or AC 7265 or AC 8260. My question is. Is this notebook has implement whitelist ? I know that Lenovo use whitelist in your computer.I dont know that this card which i want use will be working...?

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RELEVANCY SCORE 55.2

I would like to swap a wifi card. Now I have a rtlwifi card with chipset rtl8723be. And would like to use a Intel card instead. Is there somebody with the same pc and knows how to find the right fru? Many thanks! 













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A:Lenovo Tiny M73 10DK replace wifi card

Hi Sxitum,Warm Greetings & welcome to Lenovo Community, happy to have you here.
 
Below are the compatible WLAN Adapters for your system : (source)
 

FRU Realtek RTL8192 WIFI Kit
03T7292
Wireless,CMB,IN,JP1 HMC
04W3765
Wireless,WLAN,IN,CP HMC
04W3772
Wireless,CMB,IN,JP2 HMC NEC
04W3777
Wireless,CMB,LTN,8723BE HMC
04W3813
FRU WP2 22bgn HMC
04W3815
Wireless,CMB,CBT,8723BE HMC
04W3818
Wireless,CMB,IN,WP2ac HMC
04X6010
Wireless,CMB,IN,WP2bn HMC
04X6011
Ltn RTL8723BE  1x1BGN+BT HMC WLAN
20200439

 
I hope the above information helped you.
Please feel free to post in Lenovo Community Forums if you have any further queries!
 
Regards,Prabhansh_______________________________________________Tap that Kudos button if I helped.If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!

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RELEVANCY SCORE 55.2

Dear All ,  I have a problem that arised on my W540 Yesterday, and to a T420 few months ago,  The problem is that the WIFI card and drivers are the newest , all updates are on the computer , The laptop was Formatted less than 2 weeks ago(You could say that is as virgin as it can be ) , and yesterday after I rebooted , I got a limited connectivity on WIFI on my W540 , I rebooted the router , I tried to use manual IP just for testing .. Nothing !! Now I running a cable though half the living room and into my room just to be able to Write this post , I removed the drives and re installed them Still Nothing , I am running out of things to try ,  On the T420 I don't know what started the problem, but it is also a 4 week formatted computer....  So Please If anyone has a solution to this I would be really really grateful ,  Thank you in advance  Le FEAR 40

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RELEVANCY SCORE 55.2

Hello I have tried to create GPS-connect but without success. I`m put the SIM-card (no in use) to the right place. I have checked the drivers and Device Manager but everything seems to be OK. I have no idea what else I can do? 

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RELEVANCY SCORE 55.2

Hi Folks,I recently bought a refurbished Lenovo T420 which is a very nice piece of Kit, I am Hard of hearing and mostly use headphones for audio. However, this T420 seems to have something else other than the 3.5mm combo socket in place, on the right corner panel, just before the CD tray. The company I bought it from indicated that it should not be there and they suggested I try to  "Pry it out with a needle"?.Obviously I'm not going to do that untill I know what this is and why its there? I cannot connect normal head phones because there is no 3.5mm socket. Can anyone identify what this is please?3.5mm socket should be here

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RELEVANCY SCORE 55.2

Hello,I have a Lenovo T420 laptop 4236AR2 (integrated graphics Intel HD graphics 3000).Can you tell me what version of DisplayPort supports this machine: 1.0, 1.2 or 1.3 or something? Thank you in advance

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RELEVANCY SCORE 55.2

Hi Folks,I recently bought a refurbished Lenovo T420 which is a very nice piece of Kit, I am Hard of hearing and mostly use headphones for audio. However, this T420 seems to have something else other than the 3.5mm combo socket in place, on the right corner panel, just before the CD tray. The company I bought it from indicated that it should not be there and they suggested I try to  "Pry it out with a needle"?.Obviously I'm not going to do that untill I know what this is and why its there? I cannot connect normal head phones because there is no 3.5mm socket. Can anyone identify what this is please?3.5mm socket should be here

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RELEVANCY SCORE 55.2

Is it safe to change the ram frequency of my lenovo t420 i5 having ddr3, single channel ,FSB DRAm of 1:5 and my cpu is 2.50 GHz? It shows that it is running only with 664.MHz dram frequency. I am thinking if i can change it to 1600 MHz frequency...any help?
 

A:t420 lenovo windows 8 help?

DDR double-clocks, yours is running at 1333MHz.

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RELEVANCY SCORE 54.8

LENOVO G50-45 upgrading wifi card is impossible because of whitelist in bios!whitelist must be removed because there are only slow and old cards!in my notebook i want install what i want!

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RELEVANCY SCORE 54.8

Hi I have a Lenovo G510 i7-4700MQ laptop and I want to upgrade its exisiting Wifi card with a more enhanced Wifi card, that is, Intel Dual Band Wireless-AC 7260 + Bluetooth 4.0.  Is my laptop able to support this new Wifi card and is it in its wifi whitelist. Please elaborate and help me upgrading the wifi card. I am anxiously waiting for a kind response. Thanks in advance.  

A:Lenovo G510 and Intel Wireless-AC 7260 Wifi card

hi mfniazi,
 
Welcome to Lenovo Community Forums!
 
Welcome to Lenovo Community Forums!
I'm afraid that the upgrade youre plannig is not an option for the system.. 
This system is limited to these WLAN and are not equip witrh Dual Band 5ghz speed.
 
WLAN, Intel 135 1x1BGN+BT Intel 135 1x1BGN+BT  20200486 PCIE HMC WLAN (G400/G410/G500/G510)18 WLAN, WiFi 1x1 BGN Cbt BCM94313HMG 1x1BGN  20200102 HMC WLAN18 WLAN, WiFi 1x1 BGN Liteon HB125 1x1BGN HMC  20200223 WLAN18 WLAN, WiFi 1x1 BGN+BT4.0 Cbt BCM943142HM 20200222 1x1BGN+BT4.0 HMC WLAN18 WLAN, WiFi 1x1 BGN+BT4.0 Liteon WB225 1x1BGN+BT4.0 HMC WLAN 20200224
 
 
Regards
Solid Cruver




Did someone help you today? Press the star on the left to thank them with a Kudo!If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.Follow @LenovoForums on Twitter!

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RELEVANCY SCORE 54.4

My laptop LCD has been out for awhile and I've been using with an external monitor, but I decided to fix the LCD so I ordered a new LCD screen for it. The lcd screen arrives, install it and picture still doesn't show up. I then thought maybe I just had a bad cable from motherboard to LCD so I replaced that.. still no luck.

I can see a faint image in the background, but it's very dark. Same with my original screen.

What's odd is before my original laptop would show a just scrambled picture of black and white-- which is why I originally thought it was LCD.

What would the next step be? To order a inverter? Do the symptoms above sound like it's a bad inverter?

A:Lenovo ThinkPad T420 Bad Inverter?

This may or may not answer your question.
How-to: Lenovo Laptop Dim LED Screen Backlight Fuse Repair

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RELEVANCY SCORE 54.4

Hello everyone I bought one LCD screen with the resolution 1366x768 for my Lenovo t420 but the back light don't work pleas can someone help me  ps: sorry for my bad English 

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RELEVANCY SCORE 54.4

Hello, It seems I installed a wrong software and I can't now start my wondows.So for the timebeing the boot screen are rebeeting over and over without reaching windows.Thinkvantage button/ F11 doesn't work. I can only access the boot/setup menu Is there any way to restore my system without reinstall the windows again? Thanks.

A:Lenovo T420 startup issue

Try using the step provided below.http://windows.microsoft.com/en-MY/windows-vista/Using-Last-Known-Good-Configuration




*Non Lenovo employee*I have a Y2P (i5) ... Feel free to ping me if you want me to test some applications with your Y2P if you have the same model. I don't mind keep doing recovery on it if needed .... =)

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RELEVANCY SCORE 54.4

Dear all,

I went through the different steps mentioned in "clean-up-factory-bloatware" article, apart from last point which consists of re-installing my machine! But still I have BSOD and it drives me crazy.

I attached the DM Log Collector results. Hope you'll be able to find what causes this.


Thanks for your help
Isma

A:[BSOD] Lenovo Thinkpad T420

Similar errors from NVIDIA,








  
Quote: Originally Posted by Arc


Though there are other issues, like some unnecessary nvidia services ...

Code:
BugCheck 7F, {8, 80050033, 406f8, fffff88004d5103f}

*** WARNING: Unable to verify timestamp for nvkflt.sys
*** ERROR: Module load completed but symbols could not be loaded for nvkflt.sys
Probably caused by : dxgmms1.sys ( dxgmms1!VidSchDdiNotifyInterruptWorker+ab )

Followup: MachineOwner
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....


You could try an older driver version.


Code:
Microsoft (R) Windows Debugger Version 6.2.9200.20512 X86
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Users\admin\Downloads\LT-IT39-27_10_2014_134204_61\102714-6988-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

Symbol search path is: SRV*c:\symbols*http://msdl.microsoft.com/download/symbols
Executable search path is:
Windows 7 Kernel Version 7601 (Service Pack 1) MP (4 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7601.18409.amd64fre.win7sp1_gdr.140303-2144
Machine Name:
Kernel base = 0xfffff800`02c4b000 PsLoadedModuleList = 0xfffff800`02e8e890
Debug session time: Mon Oct 27 17:10:16.177 2014 (UTC + 6:00)
System Uptime: 0 days 0:13:32.859
Loading Kernel Symbols
...............................................................
................................................................. Read more

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RELEVANCY SCORE 54

Hi guys, I just spilled a glass of water on m Lenovo T420 laptop. I immediately turned it off and kept it upside down for a while and haven't turned it on for 8 hours now. Is there something I should do to avoid damage? E.g. how long should I wait and  should I do something to dry it more? Help appreciated! Thanks,Joel

A:Water spillage on Lenovo T420 keyboard

Hi Lenoovoo,
 
Welcome to the Community Forums.
 
I would rather that you remove the battery and take it to a service center for general cleaning informing them of the immediate concern about the water spill. Do not attempt to power it on as tools may be needed to safely dry it up internally avoiding other issues.
How to Locate a Repair Center or Service Provider
 
If you have such skill and tools then you can use the hardware manual here a reference guide.
 
Hope this help answer your query.
 
Regards

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RELEVANCY SCORE 54

Hi, I have Lenovo T420, my HD includes bad sectors, i'd like to replace it with a new one.My current HD should include win 7 installation files and lenovo recovery as it came from the factory.How can i make the same on the new one without copying from the old one? Thanks, 

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RELEVANCY SCORE 54

Hi, I have a T420 running Windows 10 with LSC 3.2.002 injstalled. The Solution center does not show the system tab and hence I cannot do anything with it. Any suggestions? 

A:T420 Lenovo Solution Center 3.2.002 Not showing Sy...

Did you ever find a solution to this?   Not a good sign that they're ignoring your question.

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RELEVANCY SCORE 54

Hello, I rescently bought a lenovo t420 from a vendor thats not lenovo. It was find for a while, but then it got a malware virus. i did a removal of the malware. I then powered it on again but it displayed the thinkpad logo and the next screen was just black with a blinking underscore in the corner. I downloaded a diagnostic program to a usb and ran it. This is what the log says-> http://paste.ubuntu.com/p/P8H5BrGqmc/ Any help would be appreciated.

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RELEVANCY SCORE 54

I just got a refurbished Lenovo PC-Thinkpad T420.  I think my 420 is stoned.  When I try to face chat (or whatever you call it) I can't hear them but they can hear me.  Where do I go on my device to check to see if something is wrong with receiving voice?       

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RELEVANCY SCORE 54

Hi all,i am new to this forum,i bought t420 last mounth from USA. Yesterday i spilled liquid on the clicks on touchpad. The right button works but it freezes sometimes, left doesnt work at all. Because i am in Europe now,the warnity does not cover.Do you have any idea how it can be fixed. Also the ultranav buttons dont work. With external mouse it works.Could you send me a link from a trackpad or some ideas.Thanks in forward.













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A:Touchpad buttons not working on lenovo t420

I guess the only thing to do is to take it apart and clean it;http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/0a60007.pdf 





_______________________________________________________T420s, i5-2520M @2.5, nVidia 4200m, 8GB DDR3, OCZ Vertex 3 Max IOPS 240GB SSD, Hitachi 320GB @7200rpm ulrabay, 8Pro x64T61, Centrino Duo @1.8, GM965, 4GB PC2-5300 DDR2 @667MHz, OCZ Agility 120GB SSD, 7Pro x64

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RELEVANCY SCORE 54

The free upgrade to win 10 pro failed several times.  I checked the web for problems and as a result uninstalled malwarebytes, antivirus, some drivers and some Lenovo stuff that popped up.  Finally the upgrade using the Media tool was successful.  Win 10 pro is now working on the T420.  However, only the Lenovo Companion is installed.  I bought a Yoga with Win10 pro and it came with Lenovo Companion, Settings and Account.  I have been trying to find a way on the Lenovo site to download the Settings and Account programs, but no luck.  Any suggestions?  (Probably a simple solution and I am just missing something obvious....)

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RELEVANCY SCORE 54

Hi I am new to this community, so I would like to applogise if I mist a simillar subject (I did check some but non resolved my problem). I have a thinkpad t420, I bought a used one. It worked great, and I bought it from a friend, that I trust. I installed a ssd drive, was usnig Linux, and everything worked for one month. But then I bought a HDD caddy, and replaced the CD rom. After that my thinkpad worked for a day (although it didnt recognize the second HDD). The next day I tried searching BIOS for some settings, and after restarting my laptop it was stuck on Lenovo splash screen, rebooting in a loop. I tried:- removing and replacing the caddy with the CD rom,- replacing my SSD drive,- replacing RAM (both slots),- reseting BIOS,- running a diagnostic CD (but it will not boot, neither can I boot from an USB) My google search showed that it could bi a problem with one of the USB pins inside of one of the ports (short circuit or something like that), but I could not finde any damage. So I am thinkig that the motherboard could be damaged, but I can access BIOS, but that is the only thing I can do with it. I would be wery thenkful for any advice or help, before I go to an official Lenovo service for help. Thnak you! Z.













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A:T420 stuck on Lenovo splash screen

Hi Zjaz123456,
 
Welcome to Lenovo Community!
 
As per the query we understood that you are facing issue with not booting to OS on your ThinkPad T420.
Is both HDD &SSD detecting in BIOS?
 
Check with removing CMOS battery, make sure you have disconnected the system from AC adapter and battery is removed.
 
Remove both the drive & battery from the system, disconnect the power adapter. Press and hold the power button for 15 to 20 sec perform this step for 2 to 3 times and then connect only the drive which is having OS installed in it. Use only power adapter to switch ON the system.
 
Hope this helps. Do post us back for further assistance!
 
Best regards,
Hemanth Kumar





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RELEVANCY SCORE 54

Hi have had this problem with the laptop since i got it. Have tried updating all drivers and the system bios, which has seemed to reduce the frequency of the freeze and shutdown, and searched for solutions on the net but I seem to be going round in circles. Please assist me in finding out what the problem is and how i could fix it. I have attached the necessary files.

A:Lenovo T420 random freeze and shutdown

Antivirus Software:
Code:
egui.exe c:\program files\eset\eset nod32 antivirus\egui.exe 6000 8 200 1380 3/2/2012 3:39 PM 4.2.71.2 2.12 MB (2,219,184 bytes) 1/12/2011 3:41 PM
ekrn.exe c:\program files\eset\eset nod32 antivirus\ekrn.exe 2508 8 200 1380 3/2/2012 3:38 PM 4.2.71.2 791.16 KB (810,144 bytes) 1/12/2011 3:41 PM
Your most recent .dmp files were from October. Make sure you have your system enabled for generating dump files. Dump Files - Configure Windows to Create on BSOD OPTION TWO part 2. will configure them properly. Also, avoid using any disk cleaning software (CCleaner, Windows Disk Cleanup, etc.) after a crash occurs.

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