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Ext monitor connected to hdmi port on laptop stopped working...

Q: Ext monitor connected to hdmi port on laptop stopped working...

I have been using an HP Z display as an ext monitor, connected to my Pavilion 15 notebook using the hdmi port. Following an update 2 days ago, the monitor no longer receives a signal from the hdmi port. (I know the monitor and cable are ok as they work on another laptop). Any help or suggestions how to resolve this issue will be great!

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I've recently purchased a Samsung T23A750 monitor and to my disappointment when I try to watch a movie the built in speakers are not functioning. I have a Sony Vaio Z216GX connected via HDMI to the monitor (HDMI-DVI) port. I can definitely see the video, but no audio is playing from the speakers. The built in speakers are not at fault- I did a self-diagnosis of the monitor and the speakers seem to work fine. I also set the monitor as the default for the audio and even when Win 7 says its functioning properly, the speakers still don't work. Conversely, setting the default to my PC speakers work fine. I'm sure its not the HDMI cable- I used the same one to hook my pc to my tv with everything working fine. Any ideas??

A:Monitor Speakers not working when connected via HDMI to laptop

make sure you have the latest drivers for the hdmi can check by going to the windows start bar and right clicking on computer and choosing manage then click device manger and open the tab were it says sound,video and game controllers if you see somthing related to hdmi and has a yellow triangle then right click on it and update software if no yellow triangle is there try it anyways if that doesn't help then post here again, hopefully someone who knows more about hdmi can help also because i never had hdmi but ive had audio problems with my speakers before and this is how ive fixed it before

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I have a Dell Latitude 7280 Laptop with two Dell SE2417HG monitors.
The contrast on the monitor connected via VGA through an adaptor to the USB-C port is fine. The colour  on the Monitor connected via HDMI looks grey instead of black. 
I tried swapping the connections, the result is that the monitor connected via HDMI the colour seems "washed out" while the monitor connected tot he USB-C is fine. It is therefore NOT the cables or the monitor. I did a further test with an USB-C to VGA & HDMI adaptor. Connected both monitors via the USB-C port one via HDMI cable and one via VGA. Contrast on both were the same and sharp!
This would therefore seem to be the solution, however, this configuration (having both monitors connected via USB-C) only allows one monitor to extend the desktop and not both and I need all three screens to work individually.
Id there a way to set the contrast on the HDMI port? - Changing the settings on the monitor does not work!

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My panasonicTV screen is blank when PC is connected in HDMI  but  it all works ok on a differant TV

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Hi, I have this problem with my laptop. It was working couple of weeks back but now when I connect the cable the laptop screen goes black and nothing else happens. Tried to update to the latest driver from the Acer website but didn`t solve the problem. Any ideas? Many thanks 

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Please hope you can help! About a week ago the external monitor (connected through HDMI) stopped getting signal, when reinstalling the driver it started working again. Now it happened again, and I tried reinstalling again, but nothing. I have tried the cable/monitor and they work fine, its the computer/hdmi-port. I'm pretty sure it's not a hardware problem... The Intel Driver Update Utility doesn't help either, neither does Lenovo Solution Center. What to do, I'm desperate! Help is tremendously appreciated!! /Fredrik  

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I generally use a second monitor via an HDMI cable while working. However, it stopped working today.I checked these:Windows cannot detect a second monitor when HDMI cable is connected to the second monitor.HDMI cable which I use works if another device is connected to the second monitor.My computer detects my HDMI-to-VGA converter through HDMI port.My computer runs Windows 10 Home with latest updates installed.I suspect this is due to a driver error. How can I fix this problem?

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HDMI port stopped working about a year ago. It had always worked on Windows 7 64-bit.  Also it worked on Windows 10 64-bit for quite some time.  I have HP Compaq PC with 3 TB HD with 2 new flat screen monitors each able to run as VGA or the
other way.  Had both monitors working fine.  Tried switching monitors, and everything else.  Plugged in, etc....,
I would like to simply download the correct drivers for the HDMI port, at leas for the monitor and graphics, install correctly, anin compatibility mode, I assume, and all I ask is that you please not lie to me and say I have to buy something. I'd appreciate
your expert help.  Everything works...need to install correct drivers in compatibility mode.  The correct ones.  In the correct places and know what to do if there is no "HD video, audio, and game controller" section, for example,
or "Graphics" section in device manager.

Thanx, Miguel

PS, my login email is not my correct email, but not allowable to change, so I cannot.

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HDMI port seems to have stopped working. I usually connect to HP Pavilion 23xi screen but my HP Envy does not now detect it. Tried HP Envy on other screens and it does not detect them either. No idea why it stopped working. Not a computer buff so need simple solution ideally!

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I've been using my HDMI port with a HDMI->VHS adaptor for about a year with no issuesDriver is AMD Radeon HD 8610G two days ago I took my laptop to a meeting, then when I returned home I plugged in the HDMI cable as normal and could not get the second display to work I've reinstalled the driver mentioned aboveI've replaced the HDMI->VHS adaptorI've tested with another HP monitorI've tested this monitor with another computer and it works fineI've shutdown, removed battery, held on button on the laptopI've shutdown unplugged and held on button on MonitorI've tried several other sequences of startupI've used the Project image to extend, duplicate, second screen only   etc..I've checked status of HDMI port in devices, it says it is working fine...... any help would be appreciated to get my dual monitor setup working again

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Bought this new HP Laptop and also an LG monitor to have a bigger screen. When connecting the laptop to the monitor via HDMI, volume does not come out of the monitor.I did see all the older posts on this issue and I still was not able to fix it after > going to sounds and remove the laptop sound and have sound default from monitor, etc.Any other suggetion> greatly appreciated Rox

A:HP Laptop no volume when connected to LG Monitor via HDMI

roxharley wrote:.... When connecting the laptop to the monitor via HDMI, volume does not come out of the monitor. ...Hi, What is the model of your LG monitor ? Does it have speakers ? Regards.

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New to this forum. Hope you can help.

I have been using an external monitor (Samsung PX2370) with my Toshiba laptop (about 2 years old), connected via an HDMI cable. Up until today it has been working fine. This morning the audio stopped working. Now the laptop does not find the external monitor at all when connected via HDMI. I can connect fine with the VGA cable. I have tried a new HDMI cable but it doesn't help.

Any ideas would be most welcome



A:HDMI connection to second monitor has stopped working

Is there anything blocking the HDMI ports on the computer and the monitor? you may want to clean them with compressed air.

If that doesn't help try connecting the laptop to another monitor or TV via HDMI so you can determine if it is the HDMI on the computer or the monitor.

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I have a lenovo b570e laptop and am running Windows 8.1.

I recently bought a new monitor (ASUS ve248h) to use as a dual monitor along side my own laptop however upon connecting the HDMI cable with the monitor it doesn't appear to work. I have tried updating the drivers and the hdmi port does work while I am connecting to my LG tv using the hdmi port. I have used various cables including the one that connects it to the tv however so far without success.

I am a bit clueless as to why it would work with the tv and not the monitor also my brothers laptop (which has Ubuntu) does successfully connect to the monitor.

Any help would be much appreciated and Thanks in Advanced

A:HDMI port not working/detecting external monitor

Welcome to the forum!

Are there any settings in the monitor menu that might affect it?

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Hi,I have a Zbook G3 which has and HDMI port to connect to an external display. The monitors I have are EliteDisplay E241i which have display port connectors (as well as RGA and DVI, but I'd rather not use those). Can you please point me in the direction of a good connector that will allow me to display my Zbook on the above monitors?Thanks in advance,Phil

A:HDMI (laptop) to Display Port (Monitor)

Hi, Except for VGA, from HDMI to DisplayPort or DVI is digital signals and you should get same result on your current monitor. Any standard HDMI to DVI or HDMI to DP cable will do the job. Regards.  

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I have a Toshiba satellite L305-S5875 I have it connected to my Vizio HDMI HDTV to watch netflix with. It has been working fine except for the past week. When I unplug the laptop to skype and then plug it back into the tv when I am done I get a, "NO RGB signal" message from the tv. I don't know why it is doing this, I have been able to use system restore to get it working again, but it is no longer working. Any ideas?

A:laptop connected to HDMI tv was working now keep getting no RGB signal

Try this:

Hold down the input button on the right side of the Tv. This is the bottom button
With the tv off, press and hold the bottom button (input)

When the TV powers up and you see the input menu, release and press the button
to change the mode to your preference.

Hope that helps.

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I'm sorry, I'm somewhat technologically impaired. I've been connecting my tv to my laptop via HDMI cable for several years and it's always worked fine. Today when I tried, the screens just turned back. My TV stopped saying no signal as if it recognized the computer, and the computer screen went black as if it were switching to the TV, but neither of them actually worked. I tried to go into my display settings to connect to a projector which I have had to select in the past, but it says no additional display was detected. When I tried to tell it to do it anyway, the laptop screen started turning on and off every few seconds so it was black, then back to my desktop, then black again.

The really wonky part is that when I tried starting up the computer with the HDMI cable already attached, it showed the windows startup and password screens on the TV as if it were working properly--but as soon as it loaded up the desktop it started turning the screen on and off again until I disconnected the HDMI.

I haven't changed any settings on my computer recently--the only new thing I've installed are some games off Steam. Something crazy's going on with my computer that has never happened before, could someone please help?


PS: This image should have the info for my computer please let me know if you need any other information

A:laptop HDMI to tv stopped working

Verify the screen resolution and refresh rate.

Aside from that, try manually updating or reinstalling the laptop video drivers. The drivers should be available from the laptop manufacturers website (and are the only recommended drivers which should be used).

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Suddenly my HDMI 2 connection with the LG TV has stopped working.

When I switch in Input to HDMI 2 it comes up on screen Connecting as usual but then reverts to no signal.

I?ve taken the lead out and in again but it still won?t connect.

I note when researching this problem some people are suggesting graphic driver updates and I did start with a Microsoft thing but cancelled cos I was worried in case it was not legit or virus etc.
I'm an oldie and nervous of this stuff.
I haven?t changed anything ? it was working earlier but just didn?t work when I switched as usual to HDMI 2
I do hope somebody can help me
Many thanks

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The usb 2.0 port on my pavilion laptop has stopped working and I'm getting a failure ID PK1KT1-7J285U-MFPWL1-8D7103.  HOW CAN i GET IT TO WORK AGAIN?

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I have a Toshiba Tecra R950 laptop and my HDMI port stopped working after a Windows 10 update. I have tested the cable on another laptop and it still works fine. I have read a lot of posts on Microsoft forums and this seems to be a very common problem without a straightforward solution. I'm not brave enough to roll back updates, uninstall display drivers or fiddle with graphics cards as is suggested by various forum participants. Customers suggest that manufacturers such as Toshiba may be able to liaise with Microsoft to find a solution for what seems to be a significant ongoing issue. So here I am.

If anybody does have a fix for this problem, I would be delighted to here from you.

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My XPS 8700 doesnt have a NVidia HDMI port. What  are my options to fix this if I want to connect to my monitor using an HDMI cable (without using adapters of course)? Is there a way to connect to my monitor via the HDMI port located in the middle left of the model? What is the latter HDMI port used for if it cant  connect to a tv/pc monitor? 

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Hello I have been fighting issues with my external monitor not turning back on after sleep. I have it set to hybrid mode, I understand the other fix is to set it to discrete mode but my other laptop of the same type does wake up after moving the mouse in hybrid mode. I tried multiple things. 1.) Updated Intel Management Drivers and Software 2.) Updated Thunderbolt Software 3.) Used Graphic Driver Uninstaller and to no avail.  I also installed every update for Windows 10 on their web site. The other fix is to enable and disable the NVIDIA driver in the and that wakes up the HDMI port it seems, but that should not be the case, I would like it to just turn on with the flick of the mouse or button like my other laptop. Is it a failing graphic card of Nvidia or Intels end? I do notice after the monitor sleeps the NVIDIA drivers control panel settings go missing. I already uninstalled completely and reinstalled the drivers but my computer is still having this problem. Are their any suggestions on Lenovo's end or fixes? I bought this laptop from Amazon and I also joined a 3 year support service from them.

NVIDIA.png ?109 KB

A:Lenovo P50 - HDMI External Monitor Not Working After Sleep (My Other Laptop of the Same Kind does)

Have you compared the Power Option settings on the two laptops to see if they match as well?Do the two systems share the same monitor, and if not, how is your monitor configured, does it have an option to set the input source to HDMI vs. automatically detecting the source?When in the mode where the screen does not turn back on, what happens if you press the following key combination Windows Key + Shift + Ctrl + B  (forces a reset of graphics cards) do you hear a beep and your screen wake up?     That key combination sometimes works to wake the monitors, and while not a solution, it may be a work around until you find a permanent one. Best of luck, 

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Hello,I have a refurbished T420 running Windows 10 Pro 64-Bit.  When connecting a projector via the "Display Port" using an HDMI adapter, I cannot duplicate the display.  It allows to extend the display but I like to have the image on my PC too and it doesn't do that.  Also, when extended it doesn't allow me to run operations on the projection screen. I have read aa few tips on reseting the video portion of the BIOS and I have checked, it is set on the NVDIA driver, the computer also has the Intel video driver.  I am using  MS PowerPoint 2010. This is very frustrating any help appreciated.

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Nothing is showing up on the TV. I selected the Extended screen option & nothing. I looked in Display Settings & no second screen is being detected. Even though on the TV itself. It reads that a HDMI is connected to the specific HDMI port. Windows 10 says my Drivers are all updated & my Displey Driver is AMD Radeon R7 200 Series

A:HDMI connected to Monitor & the other end connted to TV

If the title of your post is accurate.....then that will never work. You have to connect the TV to the PC with an HDMI cable and then do the same thing for the monitor. You need 2 cables. No other way around it.

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I get no sound when I connect my hdmi monitor my laptop

My monitor has no sound

How do I keep the sound on my laptop?


A:No sound when hdmi monitor connected

Try clicking the speaker icon in the lower right corner of your monitor, click playback devices, your monitor should be listed there and you need to set it as default.

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I currently want to connect a 2nd monitor to my computer. My graphics card has one VGA output, which is what my main monitor is connected to, and an HDMI output too.

The other monitor I have only has a VGA input, I'm wondering if there's a cable or converter I can get so that I can connect my 2nd VGA monitor to the HDMI output?



A:VGA monitor, but HDMI port

I think,as your 2nd monitor is not hdmi compatable then your hdmi out form your computer may not give hi def capabilities.
You can get a converter transcoder here http://www.amazon.co.uk/HDfury-1080P-HDMI-Converter-Transcoder/dp/B000SOPWS8 that might do the trick. Could be right for your situation.
Please hang around here and see if anyone else can chip in with suggestions.

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Hi! I have this monitor http://www.newegg.com/Product/Product.aspx?Item=N82E16824014146

and this cable


Connected to a normal TV and HDMI to DVI cable to my lcd monitor at the same time it gave me an option at startup to switch to my HDMI source, but when I did all I saw was black on the LCD screen.

I was able to go into Display settings and switch it to HDMI manually but when it swaps to my lcd monitor its nothing but black again!

Do HDMI to DVI cables work for PS3s? My lcd monitor does not have a HDMI plug in. Only VGA and DVI

I'm hoping theres a trick to get this working or at the very least an adapter that wouldn't degrade the quality as much.

A:Playstation 3 and HDMI to DVI Cable connected to LCD Monitor

oh nvm my monitor dosent support high def outputs =\

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I have an LG monitor but i dont get the monitor icon/option in the Audio Devices. I only have speakers that matches with my headphones and the realtek digital output. Any ideas on how i can i find the monitor? (Yes, i have tried to show disabled and disconnected devices and still didnt get it.)

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I have an external monitor with no speakers I use as a dual display along with my laptop monitor. No sound comes out of my laptop speakers nor when I hook up external speakers to it while I have the external monitor hooked up by the HDMI cable. Is there anything I can do to get this to work?

A:HDMI monitor no speakers-no sound from anywhere when connected?

Right click on the volume control and then Properties,

When you connect the HDMI it becomes the default output device, even though it has no speakers.

You need to change this back to "Speakers" and set as default.

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I've successfully added a second monitor to my new HP Pavilion using an HDMI-VGA adaptor cable.The problem is I have no sound, either through the on-board speakers or using an external audio system plugged into the headphone jack; if I remove the second monitor, I have sound, so it seems, on the face of it, I have to make a choice between the second monitor with no sound or sound without a second monitor.Does anyone know of a configuration setting that I can apply to make both work together; alternatively, is there another way of connecting a VGA monitor that doesn't have this limitation?Thanks 

A:No sound when additional monitor connected using HDMI to VGA

Hi, HDMI to VGA won't have sound and your machine thinks you send sound to HDMI connection but VGA won't work that way. Now you have 2 options: 1. Buy a new monitor which has HDMI port and speakers or 2. Disable HDMI sound   (a) Right click speaker icon,  (b) Select Playback devices  (c) Right click HDMI sound and select disable. Regards.

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Hello, I built my new computer about a week ago and was running it off a single 19" Tevion TV while I waited for the HDMI cables to arrive so I could setup my second monitor.

They arrived yesterday and when I plugged in my 32" JVC LT-32DA30J there was overscanning and the bluriness. I fixed the overscanning in the TV's menu and now the size is correct but even at native resolution, the JVC monitor is still quite blurry and is a strain to look at and concentrate on.

Plugging the HDMI cable into my Tevion monitor made that go blurry as well so it could be the HDMI cable or the motherboard ports (when I first got the PC, the VGA port had the same problem but once updated it looked normal)

Does anyone know of a fix to this ? Or can at least suggest what part is going wrong so I can try and fix it ?

What I have tried:
Changing the resolution - all the different resolutions all show the same blurriness
Changing the refresh rate - problem persists through all refresh rates
Changing monitor settings - As above, changing these settings didn't help with anything

Any help is very appreciated , I've been trying to fix this problem for most of yesterday

A:HDMI connected monitor is blurry and seems out of focus

you dont seem to have changed the 2 most important things!!

1) update the display/gpu drivers.
2) change the hdmi cable.

if neither results in it working then report back!

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when connected to lg monitor with hdmi cable i get no sound

A:when connected to lg monitor with hdmi cable i get no sound

The issue here is that HDMI cables, as the name indicates, carry audio signals to the monitor. Therefore if the monitor has no built in speakers then there will be no sound. If you have external speakers you can plug them into the audio out slot on the back of the monitor and the problem will be solved. However, if the screen does have built in speakers you need to go Control Panel>Hardware and Sound>Manage Audio Devices and set either your headphone jack or the screen to be the default device. And then you ca pick which device the sound will play from. Either yourlaptop speakers or whateer speakers are plugged into the laptop or the Monitor and whatever speakers are plugged into the monitor

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I have the same issue in windows 10 home 64 bit-
HDMI monitor no speakers-no sound from anywhere when connected?

When I right click on the volume control, the options it shows are:
open volume control
playback devices
recording devices
volume control options

It does not give me a properties option.

Then I went to control panel and searched for sound. Then I saw the screen below. There was a Digital Audio as well and I clicked 'Don't use this device(disable)' on it by mistake and clicked OK.

Now, I only have Speakers option. How do I get the Digital Audio option back in here? I think that will solve my original problem.


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Hi, I just got a new XPS 8920 from Costco that was connected to my older Dell monitor via HDMI to DVI adapter.
The monitor comes on when I start the computer, but will not wake up automatically from sleep mode unless I push the power button on the CPU slightly. 
Is there something I can do, or is it just a problem because of incompatibility with the older monitor.
Thank you! Kim

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Hello, I am weighing up my options between purchasing an Ideapad 500s or a Thinkpad L460. I do a bit of video editing, and when I'm doing that kind of work I want to hook the laptop up to a 4k screen, (the extra pixels allow a much more efficient workflow). To connect to a 4k monitor at 60Hz I have read that I need a DisplayPort output (which I note that the 500s does not have), or an HDMI 2.0. I suspect that the Ideapad 500s does not have an HDMI 2.0 output, but I would be happy to be contradicted. Could someone please confirm this one way or ther other? Preferably if you could point me to some official documentation about the product which answers the question that would be great! If it does have an HDMI 2.0, I wonder if anyone has any idea how the nVidia chip would handle the 4k screen. I wouldn't be gaming or even doing and 3d modelling or rendering - just some HD video editing - so I expect it would be fine? Many thanks,Tom

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Hi, I have a P51 with Win 10, it is connecter to external monitor and sound detects and play sounds on monitor.But after a sleep mode from win 10, sound is no longer playerd in external monitor and the external sound device isn't detected.The solution is a power off/ power on. Can somenone help please ? MAny thanks

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Hey guys.. so I connected my other SA350 monitor from my other broken computer to my main one, and it shows a black screen. They're the same monitors, and the power to both are on. I'm on Extended, the other monitor's input is HDMI and the output port on the computer is DVI (Amazon Basics). Main monitor is VGA to VGA. What should I do? Updated system specs for your convenience.

A:Second monitor connected by HDMI to DVI shows black screen

Solved. Sorry, it seems the monitor is just Pfftt. It's dead, and it's going to the Samsung Service Center ASAP.

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Using ACER K272HUL 31 inch monitor, connected via HDMI to my Y700-15ISK Laptop (ideapad). I am still in warranty according to my support account. (I did however swap out the default hard drive for another one purchased elsewhere) Here's what is happening: certain parts of the monitor with motion will remain colored while static parts will gray out. Here's a reddit thread I submitted to /r/techsupport. In hopes of utilizing two communities. So far, Bad HDMI port seems to be highest contender. I had a Y50-70 before this Y700 whose HDMI port was rather poor in quality; did not seat well, breathing on it wrong disconnected from monitor. It would not surprise me if that is the root problem.

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I have Lenovo B540 All-In-One (Windows 8) whose monitor is cracked and the screen is black. I'm trying to still use the computer or at least access the hard drive by attaching a second monitor through the HDMI Out connect slot in the back. So I purchased the "DVI-D to HDMI (or vice versa)" cable (Dynex brand) for $40 from BestBuy and made the connection to my DVI monitor.

Well, Lenovo turns on but is not recognizing the second monitor! Should it automatically recognize the second monitor or are there some steps involved like pressing down on certain function keys (like you would in laptops)? I've perused Lenovo's hardware support manual but they don't explain proper steps.

Does anyone know what the proper steps are when the original monitor is not working? I know for sure the computer itself is working; it's making all the right Windows start-up noise. No, the computer is not passworded so it should go in straight.

Would it be easier to connect to the TV via HDMI? Would I then need HDMI cables?

Thanks everyone for any suggestions you might have to offer.

A:How to have my All-in-One Recognize External Monitor (via HDMI Port)

To switch between monitors press the "windows key" + "p". repeat this a few time and see if at any point anything shows up on the external monitor.

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I have an i5-based DG67BL intel motherboard computer that has a DVI and HDMI ports with one DVI monitor connected to the DVI port.

I added an GeFORCE 210 graphics card to it that has a VGA and a DVI ports and connected additional two monitors to it.

So far computer is working fine with three monitors configured in windows as extended desktop.

This motherboard has just one PCIeX16 slot. It has 2 PCIeX1 and a PCI slot that are vacant.

I need to connect yet another DVI monitor. I took a HDMI<->DVI cable, connected it to the onboard HDMI port. the monitor was not detected.

I tried various combinations of monitors and bios settings in vain. Under no circumstances the HDMI port drove the DVI monitor.

The cable is working fine elsewhere.

What did I do wrong ? Is there something I need to buy/replace for this to work ?

Thanks !

A:How to connect additional DVI monitor to HDMI port

you 'need' to connect a 4th monitor? I recommend getting graphics card(s) to support your endeaver, but up to you.

Why don't you get a dvi to vga or maybe its a vga to dvi cord and connect the dvi monitor to the graphics card vga port?

Does it have to go into the HDMI port? HDMI carries sound as well as the video signal, dvi only carries video, and vga carries a lesser quality video

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I have an Asrock ION 330 HT BD with a Sony Bravia 720p attached (HDMI to HDMI). When I start up my PC, the screen remains black. Only after I plug in a second monitor, both screens work just fine. When I pull the second monitor out, the Bravia also stops getting a signal. Seems a bit weird.. How can I get it to work with just the Bravia attached?


A:HDMI to HDMI only working with second monitor attached

Hi and welcome to the forum.

Have you made sure your graphics card driver is up to date?

Have you tried starting your PC up in safe mode and seeing if the problem still persists?

Please ensure you have done both of these and then post back; it would also be helpful if we knew your system specifications which you can fill in under 'User CP'.

Also does the task bar appear on the primary monitor or secondary monitor?


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I just got TB16 to replace  my TB15 and I'm noticing that my Dell W3415U which is connected to my TB16 HDMI port goes blank for few seconds comes back every few hours. Like the video signal suddenly stopped or something. Not sure what's causing it but it's bothering me since it's happening while in middle of my use. TB16 is connected to my XPS 15 9550 running Windows 10 Pro via Thunderbolt 3 port.
If you know how to resolve this I would appreciate any help.
Thank you.

A:TB16 HDMI connected monitor goes blank for few seconds every few hours

Hi,Welcome to our community. Please make sure that the ports are intact and there is no lose connection. The screen going blank intermittently might be because of the lose ports.

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Hello Community-  I recently purchased a Lenovo X1 Carbon along with a Lenovo Thunderbolt 3 and two monitors. I have tested out the monitors individually with another computer, and they work fine.  Currently, I have one monitor connected via VGA to the Thunderbolt dock, and I have 1 monitor connected via HDMI to the Thunderbolt dock, which is connected to my Carbon x1. I only have connectivity with the VGA connected monitor, and do not have connectivity with the HDMI connected monitor, although I hear the system "connection sound" when I plug in the HDMI cord.  What is the issue here?  My goal is to have two monitors connected via Lenovo Thunderbolt 3 docking station to my X1 Carbon laptop. Thank you

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I have an HP ZR22w monitor with three inputs: VGA, DVI, and DisplayPort. I want to hook up a computer to the DisplayPort, but my video card id HDMI out. All the cables are sold as DisplayPort source out to HDmi monitor in. Are these cables reversible?
Can you recommend the right way to hook this up? Is there a cable that exists for this situation? Do I need a combination cable/adapter?

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if I connect external Monitor in HDMI port and check my sound device on right coner of the screen it will show 2 selection only 1) HP speakers and 2) Intel Display Audio and No HDMI option. 

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