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Can't boot from USB at T420

Q: Can't boot from USB at T420

Hi guys, I have a big problem: I have tried to install Windows 10 on my ThinkPad T420 from an USB-Stick, but I can't boot from it. The T420 has no OS and no DVD player. I tried an installation with a windows stick and an ubuntu stick, nothing works. Also I have set the BIOS options Legacy Mode to "Both". Unfortunately I can't disable the secure boot because there is no secure boot option!? :/There are any ideas?Cheers Michel

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RELEVANCY SCORE 200
Preferred Solution: Can't boot from USB at T420

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)

RELEVANCY SCORE 51.2

my T420 running windows 7 refuses to boot linux from a flash drive; the same drive allows other windows 7 machines to boot just fine on startup, I use F12 to attempt to select the media to boot from, but the machine only seems to recognize:1) the hard drive2) the CDROM3) the network card. i have enabled USB boot via bios as far as i can tell. what am i missing? plz help. - karla

A:T420 usb boot woe

Plug in your flash drive.  Enter Bios and go to the Startup->Boot section. Check if Usb Hdd is excluded from booting (lower part of the screen).If it is excluded, highlight it and press "X". Press F10 to save and exit. Press F12 and it should appear now as an option.

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After pressing power button, charge light blinks 3 times, stops for 1 second, blinks one more time, then  nothing.I have replaced the battery and charger, with the same results.

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RELEVANCY SCORE 49.6

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 36.4

Just purchased a reconditioned T420, and was happy to find the memory slot on the back of the notebook open, but when I opened the back up I noticed these two wires just to the left of the open memory slot. [IMG]http://i68.tinypic.com/epnec0.jpg[/IMG]I know it is not the best picture (its a screen capture if an instrctional video on adding memory), but you can see the part that I am talking about.[IMG]http://i65.tinypic.com/28k1s7b.jpg[/IMG] How to you attach images?Hopefully you can follow the links to see the pictures I am talking about. 

A:What can go here - T420

Hello and welcome,
 
Have a look at page 75 of the Hardware Maintenance Manual - ThinkPad T420, T420i
 
That slot can take a WWAN card (those are the antenna cables) or an mSATA SSD.  I run a 256GB SSD in mine with an HDD in the normal drive slot.  It's a nice combo.
 
Z.

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RELEVANCY SCORE 36.4

Ok, I see this topic has been discussed a lenght, I'm still uncertain if I can move from 8 Gb to total 16 Gb in my T420, help a bit of a novice if you will. Model T420 type 4178Processor: i7 2620MOS: Win 7 64 bitBIOS: original is installed, Lenovo 83ET59WW (1.29) 6/1/2011 Thanks!Bill 

A:T420 to 16 GB ram?

Yes.  2X8GB works fine

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RELEVANCY SCORE 36

Hi I have a T420 won't power on at all. I have taken the battery out and tried plugging the laptop in and nothing. Not a kick out of it. In Summer 2016 I noticed it used to get very hot underneath where the charger is plugged in, then it gets hot even when the charger wasnt plugged in. It gottop the stage where the laptop was so hot that the laptop itself slowed down and it had to be shut down completely to let it cool down, then turn it back on but within a half an hour it was raging hot again. I took it to a computer shop to be cleaned out and since then it has been perfect, no issues at all, until now. I last used the machine on Wednesday morning and shut it down correctly, then on Wednesday night I went to use it and it wouldn't power on. There is no lights, sound, nothing when I press the power button. Is there any hope for it or is it completely dead and time for me to get a new one? I bought it in 2013 as a refurbished model so I'm guessing it's just died from use.    

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RELEVANCY SCORE 36
RELEVANCY SCORE 36

Hallo,das Bios für meinen Laptop T420 (Win 10 Home 64 Bit) ist Lenovo 83ET76WW (1.46), 05.07.2013.Es scheint so, dass Lenovo hier kein Update bereit hält - und das mit Spectre und Meltdown im Hintergrund.Eigentlich ein Problem für sich - gibt es hier für den T420 (BJ 2011) Lösungen?.Was ist zu tun, um das Gerät sicher zu halten  und um die Kompatibilität mit Win10 nicht zu gefährden?- mit dem Gerät an sich bin ich sehr zufrieden und möchte es nicht austauschen.Vielen Dank im Voraus für eure Hilfe. Hello,the bios for my laptop T420 (Win 10 Home 64 Bit) is Lenovo 83ET76WW (1.46), 05.07.2013.It seems that Lenovo does not have an update here - with Spectre and Meltdown in the background.Actually a problem in itself - are there any solutions for the T420 (built 2011)?,What needs to be done to keep the device safe and not to compromise its compatibility with Win10?- I am very satisfied with the device itself and I do not want to exchange it.Thanks in advance for your assistance.

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RELEVANCY SCORE 36

Hi,I am a newbie here and having  audio issues on my T420. A liitle background the notebook is running Windows 10 Pro 64 bit upgraded from Windows 7 Pro. The notebook was running fine until my Avast virus software falsely detected VBS Malware a couple of weeks ago.  Avast quarintined suspected files and deleted a bunch upon bootup. Since that time my audio stopped working. I see a red diagnoal X on the speaker symbol and it says, "The audio source is not running". I get an error message when I run troubleshoot. I went to device manager to uninstall and reinstall the audio drivers. I am unable to open Smart Audio in Control Panel.  Any suggestions or advice would be appreciated.  Also is it possible to still go back to Windows 7. If so and I can get my audio back I would not mind. Thanks in advance, 

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RELEVANCY SCORE 36

 Hello All, my 5 years old Thinkpad t420 does not power on. the power button blinks and then does nothing. After reading about the same issue on forum, i found out that system board might need replacement.  Is it possible to fit any other system board in this laptop (i am looking for a cheaper option like:63Y1989 FRU instead of 04W02049 FRU which is installed in my system). or would it be better to go for a new laptop? pls advise. PS: i had bought 2 years extended warratny and got its LCD, keyboard and hinges also replaced during the same time. I have plugged in  quite a bit of money in it. but i am fearful of putting anymore money in this thing. It seriously lacks the relaibility for which i had purchased it.

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RELEVANCY SCORE 36

Recently started using a new T420 having had a T410 for about a year or so.  I am a regular user of Webex to host sessions or present stuff from my machine and had no issues with my 410.  I just tried to host for the first time using my new T420 with the Nvidia NVS 4200 souped up card and when I share either a specific application or my desktop all the audience sees is basically a black screen. Anyone else encountered, and hopefully resolved, this?

A:T420 and webex

hey markbat420,welcome to the forum.i have not seen this issue before, but i'll try to help. First up, could you uninstall the graphic driver from your unit.let windows install its generic driver and then try the webex again. see if it works with generic drivers.later go to http://support.lenovo.com and download the graphic driver for your unit, install and test webex again.any difference ?Also, check with Cisco Webex (i think this is the developer) if they have any issue with the Nvidia NVS 4200 card.





WW Social MediaImportant Note: If you need help, post your question in the forum, and include your system type, model number and OS. Do not post your serial number.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"! Follow @LenovoForums on Twitter!Have you checked out the Community Knowledgebase yet?!How to send a private message? --> Check out this article.

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 I am guessing one of these chips is not compatible with my T420.  I have them both installed and 6GB are recognized no matter which bay they are installed in.   So I assume 2GB on the board, and one of these is good (which?).  So assuming I will have one of the slots available, how large a chip can I get and what spec am I looking for?  (sorry I thought I knew this stuff, but apparently not)  

A:T420 - Wrong Ram?

There is no RAM "on-board", so one of the DIMMs is bad or is a 2GB DIMM, regardless of what the label says.  Try them one at a time in the slot under the keyboard.

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Hi All, Been reading around and I was wondering if I can exceed 8GB of RAM on the T420? I have read that someone was successful upgrading to 16GB of RAM.  I'll most probably be running Windows 10 Pro 64 Bit. On a fresh SSD. Has anyone achieved this? Thanks,M

A:T420 RAM Upgrade

T420 runs fine with 2X8GB=16GB total

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RELEVANCY SCORE 36

I hope this is the right place for this. I'm a long-time ThinkPad fan who really needs help choosing a successor to my exhausted T420. Been chasing my tail, reading reviews for days -T460, T460p, T460s, T560, or maybe zig-zag to X??I'm a free-lance researcher/ writer in moderately technical medical/ scientific content. VERY important: my hobbies of genealogy (lots of documents) and photography (nothing complicated, point and shoot, editing in Photoshop; simple video editing).Of course I'd love a sexy, razor-thin whatever that flips every which way, but realistically, durability and ruggedness are the priority- I often shlep my laptop locally between clients and home, a few times a year by air, but not so much that a few ounces or even a pound either way matters.I'm pretty tech-savvy, have changed my own fan and keyboard on occasion. I'm not interested in a touch screen, very comfortable with Windows 7, vaguely afraid of Windows 10.I need to get back to work - please help!(If this is the wrong place for this please direct me....)Many thanks, Rosemary

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Hello:I have a ThinkPad T420 with an i5-2520M processor. However, in the Lenovo parts list for this machine, it list several different CPUs. One of them is an i7-2620M. Does this mean that I can replace the old i5 with an i7?Thank you.

A:T420 CPU Upgrade

Since the processor is socketed (PGA) and not soldered on to the board, you should be able to upgrade it. Make sure to update your BIOS prior.

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RELEVANCY SCORE 36

I'm replacing the HDD on my T420, hopefully with one of identical capacity, but the capacity of mine is 460GB, and that's not one of the choices on all the various lists I've seen. The forum consensus also seems to be that it has only 1 port, so it can't be a combo of a 320GB drive and a 160GB drive. Can anybody tell me why the numbers don't work out?

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Hi, having just purchased a new T420 with 4GB of RAM I would like to immediately upgrade it to 8GB as right now the cost is pretty low. However, I would appreciate some advice on which option to choose. The Crucial Memory scanner gives me quite a few options. Should I buy 1 x 4GB to compliment the existing memory or 2 x 4GB and replace the existing memory? Also there are a few different typesDD3 PC3-12800 CL11 Unbuffered Non-ECC DD3-1600DD3 PC3-10600 CL9   Unbuffered Non-ECC DD3-1333either are available at 1.5v or 1.35v options. There isn't really any price difference between them, but a single 4GB stick is half the price if I was to keep the existing memory. Any help in choosing the best option is much appreciated











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A:T420 RAM Upgrade

craig-t wrote:
 
Should I buy 1 x 4GB to compliment the existing memory or 2 x 4GB and replace the existing memory?
 
Also there are a few different types...

PSREF says the T420 uses "PC3-10600 1333MHz DDR3." You can use faster memory like PC3-12800 but it won't have any effect on performance.
 
I would buy a single 4GB SODIMM to add to your existing module. A matched pair will theoretically perform faster but the difference is single digit percentage. You won't be able to perceive it in practice.
 
As for voltage, I'd Google the part number of the SODIMM you now have then buy a second SODIMM that's rated for the same voltage.

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RELEVANCY SCORE 35.6

On light browsing, my CPU is running at 89°C with a fan speed of 7485 RPM. How can I bring that down? The fan is getting loud to the point that it's annoying.

A:System Overheating (T420)

It's not a desired or reccomended soulution, but I ended up putting new thermal compound on the CPU/GPU on my W530 because the temps were high and the fan wouldn't stop spinning at high speeds. 
 
Its also possible that the fan vents have dust in them, so cleaning them out with canned air can help if that is the case.

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RELEVANCY SCORE 35.6

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 35.6

My T420 is overheating whenever I have AC plugged in or am on battery. The switch is 91 degrees and fan speed is 7488 RPM. I don't have issues when I take out the battery and use AC power only, but then wireless will be very slow. I recently replaced my battery after my original died. What should I diagnose next?

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RELEVANCY SCORE 35.6

I have tried to do every moves I found from here and other places in the net. There is no connect to satellites. Drivers are OK and Device Manager seems to be fine also....I have put the SIM-card to the right place (no in use). What else can I do?

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RELEVANCY SCORE 35.6

Hi there, I am thinking to upgrade my T420 from windows 7 Pro. to Windows 10 Pro.  I have checked on the Lenovo page but they dont seem to have the drivers for Windows 10 yet.  Also, the T420 model is not listed on the Lenovo Windows 10 compatibility list.  Does anyome have more info on this? Did some of you tried installing Win 10 on the T420 series?  PLease let me know, much appreciated. Chris

A:T420 and Windows 10 upgrade

The T420 isn't officially supported by Lenovo for Windows 10. It should still install and run fine, but you'll need to source your own Windows 10 compatible drivers from OEM sites.There are also driver aggregator sites out there like station-drivers (French, but the download button is obvious).

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RELEVANCY SCORE 35.6

According to the documentation to access the BIOS on a T420 you press the blue "ThinkVantage" key.   Pressing that still causes the unit to boot to Windows (10). I've also tried F2, Fb+F2, and F12. Is there a work around for a possibly defective ThinkVantage key?  (The password, now forgotten, has expired and I need to access Restore from BIOS)













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A:Can't access BIOS (win 10, T420)

Boot into windows 10 and force a full shutdown.  Hold the shift key while powering off.  Then hit F1 when you see the splash screen.

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RELEVANCY SCORE 35.6

 I recently purchased a refurbished t420 with windows 10. since my purchase i have upgraded the wireless card and gone from 8 to 16 g of RAM. now i want to add an I7 processor but heard i will need t update my system BIOS to run processor. does anone or can anyonr help with update or corrective actions to take

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RELEVANCY SCORE 35.6

I'm looking to get my first ThinkPad, and the model I'm currently looking at is the T420. I'm attracted to that particular model mainly due to the price (they can be obtained second-hand at low cost). I don't need a powerful laptop - after borrowing a simularly spec'd Dell for a while I'm perfectly happy with the performance of Sandy Bridge. However, one thing that I do want to be able to do is connect two external monitors to the ThinkPad. When both monitors are connected to the ThinkPad I won't be using the internal display, the ThinkPad will be away in a dock. However, both monitors are VGA only. There are various docks available for the T420 that have a VGA port on them, and the T420 also has a built-in VGA port. Will I be able to run two VGA monitors (not mirrored, extended desktop), one from each VGA port? Kind regards,Andrew

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RELEVANCY SCORE 35.6

I have a T420 but the Microphone doesnt seem to work.  I've read many posts about these issues but nothing I've found has solved my issue. I've tried three drivers: 1. Windows Default driver:  The microphone shows up in the CP recording tab however it doesnt record any sound at all2. conexant 20672 driver (8.32.23.5) from Windows Update and (8.32.44.0): The microphone doesnt show up at all in the recording tab Some have said to goto the advanced tab and disable "Enhancements" but I see no option.I've tried FN-F6 and tried many permutations with no difference.

A:T420 Microphone issue

Hi eng3,
 
Welcome to Lenovo Forums!
 
Try this, go to control panel / sound / manage audio devices
Go to the recording tab, click ?internal microphone", then properties.
Then in the "level" tab make sure the mic is not muted (even if the level is at 100 %)
 
Please let me know whether the above steps helped you.
Thank you, have a good day.
 
Did someone help you today? Click on the ?upper half star? at the left side of the post to thank them with a Kudo!
 
Regards,
Naveen.v

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RELEVANCY SCORE 35.6

I had a virus and had to wipe the laptop with a fresh version of windows 7 pro. It works but I've lost Ethernet, bluetooth, pci, and other adapter drivers.  How do i recover them. Thank you

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RELEVANCY SCORE 35.6

I just got my new T420 and love the laptop. But, there is no firewire port? I don't recall having an option to add the firewire port and from what I have read, the firewire port comes standard with all T420 laptops... Did I miss some fine print about the port being removed? 

A:T420 and Firewire Port

On my T510 the FW port is located on the left side, right near the front. It is to the right of the combo USB/eSATA port. It is a mini-FW - no power, intended for FW devices that have their own power, eg., digicams. http://pics.bbzzdd.com/users/Corky-G/510-FW.jpg

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RELEVANCY SCORE 35.6

Hi, the speaker on my tasklist does show the speaker symbol with an red x. When I move over then I get the message that no audio device is installed. When I do a click on the speaker symbol the automatic problem analysis is started and I get the message that I haveto restart the computer. But it does not work Here are some observations : -when I shutdown the TP at the end of the process I here a beep. So the speakers work. - at some point in time in the past ( I do not know exactly when ) I have seen this speaker symbol with the red x. When I did the actions as mentioned above after a reboot the speaker worked well. When I did a restart again the speaker didn't work. I could do this for some time. Then this also didn't worked. - Then I have re installed the TP ( I have an upgrade from windows 7 -> windows 10). I used my initial windows 10 backup right after the upgrade. After the system backup had been installed I had the same speaker problems. Then the automatic windows update downloaded new files. When I restarted the TP after this process the speaker worked well again. When I restarted the TP again after a while the speaker didn't worked. Now I have given up and write these lines Any idea ?

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RELEVANCY SCORE 35.6

Hi, I worked with quite a few external monitors connected to my T420 with no issues, but now I am trying to connect a 16:10 monitor (1920x1200) and it doesn't display properly. I am using a VGA (D-SUB) connection unfortunately. Win7, and the video card is the integrated from Intel. Anyone else can confirm they got a 1200 vertical resolution monitor to work on a T420 using VGA connection? Thanks.

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RELEVANCY SCORE 35.6

i have an insignia hd tv and im trying to connect my t420 and use the tv as a screen but its not working, any ideas on how to do this. also i went on intel hd graphics properties and went to monitor and display and nada

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RELEVANCY SCORE 35.6

Hello, I have a bit of a problem as the title states.Things I have tried:1.Installing various driver updaters2.Doing sysprep, yet that always errored(Yes, I did the solutions)3.Uninstalling Conextant(default lenovo sound device for T420),4.Troubleshoot, yet it never fixed it.Also, I have searched up the people with the same problem, yet mine still has the drivers installed....  http://imgur.com/a/cPukShttp://imgur.com/a/rQeKx 

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RELEVANCY SCORE 35.6

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 35.6

If I remove my WWAN card, in order to install an SSD card, I will lose my ability to acces the internet via wireless, is this correct? If I decide to do this, will this work? Samsung 840 EVO mSATA 500gb, SATA 3 And will I be able to boot from this device? Thanks! 

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RELEVANCY SCORE 35.6

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 35.6

After upgrading to Windows 10 I can't right click using either of the sets of mouse buttons and gestures do not work on the touchpad.

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RELEVANCY SCORE 35.6

Hi all, Trying to find an ISO of T420 recovery media, laptop is out of warranty and can't get one from support but the hard drive is dead. Regards,Alan

A:T420 recovery media

Hi Alan,
 
Welcome to Lenovo Community!
 
As I understand that you are looking for the Recovery media for your T420.
To order Recovery media for your device on chargeable basis please enter the Serial number of your model and check the availabilty.
 
I hope the above information helps.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 35.6

Awhile back I bought a us4ed T420-4177CT0 with 8G of memory, and its been a great machine. I decided to upgradeit to 16G and bought 2 8G sticks. When I just now opened it up, there was only a single memory slot (and I lookedhard, and had a friend who has built machines look also) (see pdf). Just to make it weirder, I looked at the 8G cardin it, and it said "8G (2x4G)". So Im wondering if the solution is just to buy a single 16G card, or if there issomething someone with expertise can recommend. Thanks!


























t420_memory.pdf ?475 KB

A:t420 memory slots

According to the User Manaul for you system (see Replacing memory information starting on page 123), there is a second SODIMM memory slot under the keyboard..     The Detailed specifications - ThinkPad T420 document, however, states that it only supports a maximum of 8GB of RAM, but I have found that later BIOS updates often allow for more RAM that the origional Lenovo specs, and have heard that others have successfully upgraded their T420 to 16GB. User Guide ThinkPad T420 and T420ihttps://download.lenovo.com/pccbbs/mobiles_pdf/t420_and_t420i_ug_en.pdf ThinkPad T420 and T420i Hardware Maintenance Manualhttps://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t420_t420i_hmm.pdf Cheers,

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RELEVANCY SCORE 35.6

Hello.I was using my t420 just fine, no symptomps or malfunctions, till today.I powered on the laptop and after the light and the caps lock led flashed, the wifi icon went on and nothing else happened. The screen reamained off (not just black, really off with no backlight). I've removed the two dimms (one first, then the other), i removed every drive and pci device, deattached the system battery for a minute, replaced the thermal thing between the cpu and the thing that cools the cpu (sorry I'm not english) and yet nothing. Then, when I've reassembled it entirely, it goes on, giving me the message "machine type and serial number are invalid", then goes normally to the desktop. After I power it off, it is dead again. Sorry for the long post.Can you help me? Is there something I can do, besides throwing it in the trashcan?

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RELEVANCY SCORE 35.6

bought a t420 benn allright until this suddenly happened.The power  icon flashes 3 times green then when you press power button it wont turn on.In order for it to turn on i have to remove the internal cmos battery which is beneath the keyboard then leave it for 5 minutes  then replug it back in plug the ac power supply in then it will automatically boot itself up any help would be much appreciated.

A:t420 wont start

It might be the power button on the keyboard.

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RELEVANCY SCORE 35.6

Has anyone found a way to successfully install intel wi-di on a t420 or t430 running windows 10? I have tried many driver combinations without success. From what I have read it seems that these machines used intel?s proprietary tech for wireless displays where the current gen is just miracast rebranded. Its seems intel is no longer developing for new operating systems for 4-year-old hardware.

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RELEVANCY SCORE 35.6

I have T420 Laptop (ThinkPad - Type 4178A3) ond Windows 8.1 64bit. In my windows device manager I have one device without driver. All windows updates (including optional) are installed.I also checked my laptop via Lenovo System update tool in support page (Drivers & Software tab) with a message "No drivers are required to update for your machine". The device with missing driver is in category Other devices / PCI Serial port.The location is : PCI bus 0, device 22, function 3Details:harware Ids:PCI\VEN_8086&DEV_1C3D&SUBSYS_21CE17AA&REV_04PCI\VEN_8086&DEV_1C3D&SUBSYS_21CE17AAPCI\VEN_8086&DEV_1C3D&CC_070002PCI\VEN_8086&DEV_1C3D&CC_0700 Could anyone help which driver I need? Thanks in advance 

A:T420 driver Windows 8.1

Reference this post:https://forums.lenovo.com/t5/ThinkPad-P-and-W-Series-Mobile/PCI-SERIAL-PORT/td-p/1653731

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RELEVANCY SCORE 35.6

Hey guys,My T420 4178lLaptop had gone unused for quite some time (it was at my parents place while I was out of the country), and the battery and power cord were both already struggling I'd left.I'd like to replace both - though the cord kiiiind of works, the battery doesn't at all - and I have no idea how to do this! When I search on the Lenovo product page I get a whole bunch of stuff about 55+ and 70++ batteries that I confess that I don't really understand.Can someone point me in the right direction? I don't want to spend hundreds, but obviously you need to break a few eggs to make an omelette.Thanks!

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RELEVANCY SCORE 35.6

What is the best SSD to use in the Ultrabay caddy in a Thinkpad T420?

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