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HDMI port not working - 'not plugged in'

Q: HDMI port not working - 'not plugged in'

Hello,I've been trying for hours to connect my external monitor via HDMI cable, but neither the laptop nor the Monitor sees eachother.I updated monitor's firmware to the latest and no result. Still, my computer displays that there is nothing plugged in the HDMI port when I insert HDMI cable. The monitor sees that I have plugged in something in the HDMI port, but doesn't receive any signal from my laptop.Would you please advise if there is any solution to this specific situation?Also, be advised that even with the latest video driver downloaded from your website, I am still unable to play on OpenGL video mode. I am looking forward to your reply. Many thanks in advance,

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Preferred Solution: HDMI port not working - 'not plugged in'

I recommend downloading and running DAP. It can help sort out any driver and firmware related issues on your system

It's worked out well for many of us in the past.

You can download it direct from this link http://downloaddap.org. (This link will open the download page of DAP so you can save a copy to your computer.)


Hello            i have hdmi plugged in the hdmi port on laptop and other end to my Network Video Recorder M2-Box, but i have a message in Sound saying the HDMI is not plugged in and a red arrow pointing down.... can any one help....

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Purchased a new M715Q mini and upon connecting using the display port and HDMI for video was not being recognized. I then looked at the the USB mouse and found that it was not being recognized either. Tried all USB ports and none of them recognized the mouse. I have a 3 other lenovo products M900 series and 2 laptops and they all work with monitors and mice. I also found the unit getting extremely hot where the fan kicked on 3 times and turned off. Has anyone else had this issue?

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I plugged my laptop into an integra 30.4 receiver via HDMI port (multiple ports) and with the receiver on the right device port and connected to a tv or a projector and I get no audio out of the HDMI port only Video. Video works great!

The laptop is an alienware laptop on Windows 10 (upgraded from windows 7 purchased November of 2011). The HDMI would transfer audio and video in windows 7 intermittently for a year or two. However, I had to turn the tv, receiver, and computer on in a specific order and eventually, approximately 1 hour of doing this each time I wanted audio I'd get the audio over the HDMI cable until I shut down....

I've been on windows 10 now for a while and never have gotten the HDMI audio to work. I kinda gave up but would like to use my laptop now to play movies to my new epson 4k projector and am unable to get audio to work at all. Video is phenomenal.

The HDMI port shows up in the device manager under sound devices. However, constantly shows "Cable not plugged in" whether the cable is or is not plugged in.

It's an older Geforce card - wanna say it's a Geforce 555. Also has an intel graphics adapter as well. I've done all the nvidia updates, windows updates, I've gone so far as removing the sound adapters and rebooting, removing the graphics adapters and letting them reinstall. The HDMI audio port always comes back with "Cable Not plugged in." It's staring me in the face constantly.

I kinda gave up and switched to broadca... Read more

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Basic Specs

Brand New Toshiba Satellite C855
Win 8 64-bit

Display Adapter: Intel(R) HD Graphics (2000)
Driver: Intel

Playback Devices
Show Disabled Devices - checked
Show Disconnected Devices - checked

High Def Audio Device displays as not plugged in

Cable is plugged inCable has been tested on backup laptopCable connected to HDTVVideo is fineNo Audio

I have spent hours installing and uninstalling drivers from the Toshiba and Intel sites. Tech support said to return it but I have just spent 2 days installing software. I never took a break to watch Netflix. Any suggestions will be greatly appreciated!

A:Audio Over HDMI Cable Not Working - HDMI Cable Not Plugged

The video is apparently not detecting the HDMI cable. Assuming you have a good HDMI cable it suggests a hardware problem in the new PC.

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Hi everyone, the wifi connection on my Ideapad 500S-14ISK stops working when I connect to any external monitor via HDMI. I've had this problem eversince I've gotten this laptop.The wifi works fine, only when a monitor (either the TV or my external monitor, using different cords) is plugged in I lose my internet connection, even though it still shows full wifi connection. It works very briefly if I disconnect the wifi and connect again. Starting the computer while the monitor is already plugged in does not help. All drivers are up to date. Thanks in advance for all replies, I appreciate it.

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i got this laptop for christmas from my wife started using it and started using the hdmi port to stream thru my tv and after i updated to windows ten the hdmi port stop working. edition windows tenos build 1607product id : 00325.80569-42003-anoemprocessor: intel(r) pentium(r) cpu n3540 @2.16ghzram 4.00 gmsystem type 64-bit opreartingx64 based processor please help

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Hi guys, new here. I recently purchased a used HP Pavilion G4 from a friend and tried to plug it into the TV using e HDMI port. When I plug in the HDMI port the computer doesn't say or even recognize that there is a cord plugged into it. The tv also shows no signal. I think it is a driver issue, that a driver isn't installed on the computer. But I have no idea what driver to install. Any suggestions?

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I'm trying to display my PC to my TV but when i connect the HDMI to the PC and TV nothing happens on the computer and it doesn't recognize anything when i go to the display setting and try to set it to the TV. I know the HDMI works because it's the one i use for my PS4, I also know that the TV is on the right source setting. I have updated all of my drivers too. Is the port just broken or what?

Tech Support Guy System Info Utility version
OS Version: Microsoft Windows 8.1, 64 bit
Processor: Intel(R) Pentium(R) CPU N3530 @ 2.16GHz, Intel64 Family 6 Model 55 Stepping 8
Processor Count: 4
RAM: 3977 Mb
Graphics Card: Intel(R) HD Graphics, -2043 Mb
Hard Drives: C: 454 GB (416 GB Free);
Motherboard: Dell Inc., 0F2A20
Antivirus: Windows Defender, Disabled

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After Win 10 upgrade the HDMI port is not recognized.

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The tv worked for all of 15 seconds, then stopped. I have downloaded the recommended drivers with no resolution to the issue.It is as if the HDMI port no longer exists. I cannot find it anywhere in the device list.HP, is this the kind of customer service you want to be known for? I see many comments on this thread for the same issue, yet you have not provided a solution.Quite interesting how this issue occurred shortly after my warranty expired.

A:HDMI Port not working

Hi @Ssniderwin,
Thank you for showing your interest in HP Support Forums. It is a great place to find the help you need, from other users, HP experts, and other support personnel. 
I came across your post about the HP notebook, and wanted to assist you! I have looked into your issue about your HP G62 notebook and HDMI port not working correctly. Try running the Windows update tool - Click here
For more assistance, please go through the support document for HP PCs - Troubleshooting HDMI Display and Sound Issues (Windows 10, 8, 7) - Click here
I hope this helps. Let me know how it goes for further assistance, I'll be more than happy to help.
Keep me posted,
If the information I've provided was helpful,
give us some reinforcement by clicking the solution and kudos buttons,
that'll help us and others see that we've got the answers!
Good Luck.

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hi there, I was using my HDMI port to connect to my TV on my HP G62 Laptop, and in the middle of it playing, the port just stopped working... Very upsetting as we use it all the time. Any tips on how to fix this?

A:HDMI Port not working

Can you post the exact Model number of your notebook and the current operating system it is running on? Is the HDMI port not working at now?

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Please can someone help me.
I have an acer predator laptop which has windows 10 installed. My HDMI port used to connect an additional monitor stopped working and I can't figure out why. The Intel HD graphics as well as the NVIDIA graphics are all up to date but it is still not working. The HDMI port is functional as it works when booting into a Linux OS.
Can someone please advise as to what could possibly be the problem

Kindest regards

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Hi all,

I've just recently got myself a new laptop (specs at bottom of message) and took it around a friends house and plugged it into their HD TV via HDMI - all worked well, the laptop recognised the TV straight away, optimized the display and away we went.

A few days go by and I decided to upgrade my own TV from an SD to an HD TV (Bush BLED24FHDL8) yeah I know cheap as chips, but it's going alright so far ... well except this problem pmsl.

Within 5 mins of setting up the TV channels I decided to plug my HDMI cable into the laptop and then into HDMI 1 slot on the back of the TV, I changed the input of the TV to HDMI 1 and.... nothing.

Going into the display settings of my laptop didn't show a 2nd display, so I changed various settings trying to get it to recognise the tv, but nothing, still no signal showing on the TV, and nothing showing on the laptop.

So I changed over the cable to the HDMI 2 slot on the TV etc and still nothing on the laptop, I fiddled with the settings again and still couldn't get the laptop to recognise there was a 2nd display, nor get any signal on the TV.

As a last resort I unplugged the HDMI cable and tried the VGA cable I have - and this decided to work, although no sound as I didn't have those cables plugged in.

When I plugged the VGA cable in, the TV and laptop recognised each other straight away and I didn't have to do another thing.

But I've still got this HDMI problem --- I've even gone out this a... Read more

A:HDMI port not working on TV or something else?

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HI All

I have moved to Windows 7 from Vista, finally

Computer - HP 8710w, Intel Centrino vPro, Nvidia Quadro

I connected my HDMI cable to TV Hdmi port and PC Hdmi port but no signal on TV at all. With Vista it was plug and play (just needed to adjust audio settings on PC).

I have tried downloading updated drivers but to no avail. While connected pressing the Fn key and F4 hey does nothing, the computer has no idea that something is in that port. I think the port is somehow inactive or physically damaged.

How may i check to see if the port is working and how do i check if its software related?

Many thanks

A:HDMI port not working

Are you running more then one monitor at a time? If you are then you need to right click on your desktop and select "Screen Resolution". Then find the TV on the display device drop-down menu. Then check the box "Make this my Main Display".

Let me know if that works, if not I can help troubleshoot the problem some more.

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I recently unplugged my HDMI cable from my gpu (980ti), once I plugged it back in, the monitor didn't detect any signal. My computer can't find any other monitor, only my main display. Already tried to switch between HDMI cable but still nothing. the HDMI port itself still looks pristine. I don't know why it isn't detecting the second monitor anymore.

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Model:17-g101dxS/N:5cd5380vjjMy HDMI port is not registering that there is anything plugged into it. I've tried switching cables and using different device on the cable, everything checks out but the laptop still does not register that there is anything plugged into it. 

A:HDMI port not working

Hi, Please try to hit f4 which tells your computer to send signals to an external device Regards.

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I had to change the motherboard of my new PC spectre 360 but when i got it back the HDMI port is not working at all

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One of my HDMI ports on my HP ENVY Desktop - 750-114 is not working for my dual monitor set up. Both of my monitors are HP25VX.In the device manager a yellow triangle shows on both the IDE Controller and on Display Adaptor. When I check the drivers I am prompted that both are working properly and that no updates are available.I am running Windows 10, and I contacted Windows, Their representative said that my problem is not the operating system and is not software and that the problem is hardware and advised me to contact HP for support.Thank you for any help that you can provide.

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Hi there,

My computer (windows 7 64bit desktop) at the office seems to be not able to connect to internet sometimes even though the cable is plugged directly into the internet port on the wall. Sometimes it works one day and then the next day when I come into office again, and it won't work.

Every time i need to do the ipconfig release and renew then it starts to work again.
I also heard that my coworker experienced the problem too when using windows 7, but the older computers running on xp never had an issue.

Does someone know is this some kind of problem that only windows 7 have?

Thanks for your help!

A:Internet connection not working even when plugged directly into port

Hi there That guy, as it is in an office environment, does your company have any type of IT-administration?
If so i would advice you to talk him/her about the issues, as they may have more information about the issue. Like if they use different DNS configurations on the windows xp ones or always assigns the ip automatically?
Hope this helps.

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Hi everyone I am trying to add a second monitor to my all-in-one computer but the monitor nor the computer seem to recognise that a HDMI cable is plugged in.  The screen I am connecting to is a Dell screen.  When the HDMI cable is in my computer it just flashes black and back tot he main screen again.  Also the second monitor does not receive a signal. Help please, searching and searching for an answer for days! Many thanks

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Hi Gang,

I brought this GT-610 Galaxy video card with 1gb ram on Ebay a few months ago. It was brand new. It worked fine until one day I had to unplug the HDMI cord that lead to the TV (using clone view). After I did this and plugged it back in there was no more picture on the TV. It had been working fine. The cord shows up as being listed on the TV as HDMI 2 but when I look for it on the PC I see nothing. I used to see LG TV. Not it is no longer listed.

I have tried rebooting, turning PC off, updating drivers, reinstalling the drivers and taking the card out and and putting it back in. Nothing works. What do I do?

A:How do I get my Nvidia hdmi port working again

Have you tried a System Restore to a date/time when it was working?

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I've got a new TV that has a HDMI port, I have a PC with a GeForce GTS 250 graphics card.

I tried connecting my PC to the TV using HDMI cable, it works while booting, works if I boot with Ubunto, but disconnects if I boot with Windows 7, it shows the "Starting Windows" message but it disconnects once it's about to show the user's log on page.

What's the problem out there? I'll appreciate any help.

A:HDMI Port Not Working On Windows 7


I had to run NVIDIA Control Panel then connect my TV to get it recognized.

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I have a Dell Inspiron 720 with an HDMI port in the back. I have been using it with my Samsung TV to watch movies on. Now it no longer works. I ordered a new cable but it keeps telling me to check power supply, cable connection, and the make sure it's on the right setting. I have 2 hdmi ports on the back of my TV but still come up with the same error condition when I switch them. It appears the port in the computer is not working anymore. I have tried everything but nothing works. I am running an ATI 4200 which is on the motherboard. Can this be fixed or would I have to buy a new graphics card to get it working again. I did swap the cables but still get the same results. Does anyone have any ideas because I have run out of them???

A:HDMI Port not working anymore

The only way to fix it is to buy a new motherboard, do yourself a favor and buy a new video card instead, Dells are not worth fixing. But if it`s under warranty well then that is a different story.

If that`s a laptop then your ONLY option is to replace the motherboard, very simple to do.

EVGA - Products - Graphics

MSI USA - Computer, Laptop, Notebook, Desktop, Mainboard, Graphics and more

What keeps telling you to check the power supply ???

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I recently bought an HP Envy m7, and I setup an external monitor. I recently had a BIOS update, which I think broke the HDMI port. I connected the port to a projecter, and it still does not get any input through the HDMI. I've tried multiple cables, and none of them work. My monitor I'm using is an LG IPS Flatron monitor. When I plug in the HDMI, it tells me it's not receiving anything to diplay. I've used Windows Key + P to switch it to extend mode, but it doesn't work.

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Hi all, I recently bought a HP Envy desktop 750-103a but can't get the monitor to work using the HDMI ports 0 and 1? I have tried to use the playback devices to recognise it but I don't seem to be able to get anything. Could someone please assist me, I'm not sure what to do. Thanks Rick

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Wanted to use the Envy 23 all-in-one (23-k106d) display as a secondary monitor.Connected my notebook hdmi output to the Envy hdmi input port via hdmi cable.Nothing appears on the Envy Envy 23 all-in-one display eventhough I pressed the hdmi button at the bottom.The cable has been tested and it is working.

A:HDMI input port not working

Hi, This is not going to work. It is designed to work with games consoles, not for laptops. Regards.

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Hello, I'm in IT where I work and we have a few Lenovo P50 laptops. They are all on the same image that I've created but one in particular has the HDMI port that will just not work. I've tried the Thunderbolt firmware upgrade but in order for that to work it says that you must connect it to an external monitor through HDMI and have it displaying which it will not do. Since we've had this one it used to display just fine on HDMI but now it does not. Any ideas for getting the firmware upgraded to see if it helps?

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Like there is something wrong with my port i put in all the drivers and it's not detecting my TV

Any suggestions?

Here is my Support Driver Page:

If there is a specific one im suppost to download please tell me

Model: L755-S5244

A:Solved: HDMI Port not working

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Will not display on any monitor. Tried multiple different monitors. Updated all the drivers, from Intel, NVIDIA, and HP. Nothing works. Funny thing is that NVIDIA recognizes the monitor, name, make, and resolution. But no where can I find NIVIDIA recognizing the built in display on this computer. Intel recognizes the built in monitor, but doesnt see the external monitor.In the NIVIDIA contorl panel under system topology it details the HDMI port, its connected. So I got my IT people involved. They couldnt figure it out either. They tried everything. They believe that since NVIDIA sees the external monitor, but "Multiple Display Cloning" is "Disabled" (Unable to enable it) that NVIDIA doesnt recognize the built in display, it thinks the built in display is the monitor. When the external monitor HDMI is unplugged, the NVIDIA control panel clears out as if no monitor exists at all. This is a brand new HP zBook that I have had for a couple months. Been fighting this issue ever since. Desperate to get my monitor working I recently went and purchased a VGA to DVI converter and DVI to HDMI converter. That doesnt work either. I feel defeated, crushed by an HDMI port.

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Hi there,Can someone help me?I've had my all-in-one for about two years and never tried to use the HDMI port. Only now that I bought an LG ultrawide monitor (to use as a second monitor) and it doesn't work. It doesn't even detect/recognize the monitor when I plug it in, but the monitor works fine with my laptop computer. What can I do?

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Hello HP community, I have a HP 15 TS Notebook PC and the HDMI port is not working. Yesterday (9/17/2016) it was working just fine. I had my laptop connected to my TV via HDMI and it working. Today my computer did an update and after the update my computer did not read the HDMI cable. I am not even sure what the update was for, but I turned it off this morning and it updated and then updated again when I turned it back on later today. After the update the computer does not read the HDMI cable. Everything else works fine. What should I do? Thanks!

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the Aspire xc-710 come with botg HDMI and DVI port. It was working fine with two monitor until today. The DVI port goes blank and had changed cable as well as swap the monitor, the problem lies with the DVI port at the graphic card not signal. What can I do? 

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I've got a Inspiron 5749 17" laptop.
I am trying to connect a 2e monitor to it but i can't seem to get it working.
When i try to detect the monitor i does nothing.
I've tried the following things:
* Update video drivers to latest (Intel and Nvidia)
* Update bios
* Tried serveral hdmi and displayport cables.
* Monitor is working on a other system.

What can I do more ??
Please help...

Regards Dennis.

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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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My display port to HDMI Converter is not working...I am not getting display of my Notebook on my TV/LCD...I have HP Elite Book 8470p with Windows 10 (32-bit) and display adapter AMD Radeon HD 7570M...All drivers are up to date...

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Just unboxed my computer from CyberpowerPC, GTX 720 graphics card, installed/updated all drivers with drivereasy (paid for just now) and I am still having the issue with HDMI port not working. I have tried to plug into a monitor and a TV, neither are working, I have also tried to use multiple HDMI cables, still does not work. My monitor has an auto-switch source availability and turned on, when I plug my computer into the monitor with HDMI it continually cycles, finds no signal and goes into sleep mode. Then rinse/repeats until I either turn off the computer, monitor or just unplug the monitor from the computer. Currently I am using a DVI(computer) to HDMI (tv) and its working fine. So I know its the port on the computer. Do I need to contact CyberpowerPC to send the computer back to get this issue resolved? Thank you for the help.

A:Brand new out of the box computer. HDMI port not working

Does the PC also have an integrated graphics processor (IGP) on the motherboard and the GTX 720 graphics card is an upgrade? If so, there might be a bios setting that will disable the IGP and use the graphics card instead.

Also, right click on the start icon, then click on device manager. Click on display adapters. Is the GTX 720 listed as the display adapter?

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I have a HP pavillion slimline 7720.uk, i have just bought a Nvidia Geforce 8400GS graphics card with HDMI output! I have a sony bravia 32" LCD tv with HDMI input! i have set up the graphics card fine as far as i know, and is working fine through DVI, although when i connect my computer to the tv via HDMI there is no picture at all, i was just wondering if there is any settings i need to change to make the HDMI port on the graphics card work any help would be very much appreciated!!

Stephen Doorbar

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I have been using an AOC monitor as a second screen attached to my laptop via HDMI under Windows 8.1.

The monitor is telling me that there is no signal from the HDMI port. I have changed the cable and changed the port on the monitor, but it still is not working.

Can you help?

A:Hdmi port no longer working on Satellite Pro R50-B

Could you provide more info:

What notebook model do you have?What system is preinstalled?Did you try to reinstall the graphic card driver?

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Is there a driver for the HDMI port for the Satellite R830?
It no longer connects to a TV.

I have tried different TV's but still nothing.
Also there is no HDMI under the device manager under the control panel, should there be?

Many thanks for any help or advice.

A:Satellite R830 - HDMI port is not working

I don?t know what Windows system you use on this notebook but the HDMI driver isn?t available since the HDMI port driver is part of the system and should be recognized automatically.

For HDMI sound capability you should install the right sound driver and should enable this in control panel -> sound -> playback device

In order the HDMI (digital out) would not be listed there, right click and choose:
show disabled devices, show hidden devices.

Usually the HDMI connection isn?t very tricky. Everything should run automatically.
Connect both devices using HDMI cable.
Power up the TV, then computer.
Now use the function key (FN key) video output combination in order to switch to video out (HDMI).

Note: the right HDMI channel should be chosen on your TV

That?s all

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My HDMI port is not working
I have tried to use my HDMI port to connect my laptop to various monitors and TV's. They do not even reconize that they are connected. I have used the same monitors and TV's to connect other laptops that I have so i know that they work fine. I have used the VGA port on my laptop to connect it to a TV and it works fine but not for the HDMI port.
Anyone have any idea on how to fix this so i can connect my laptop up to a TV.

A:HDMI port not working for Inspiron 15 (N5010)

Look up Connect a tv in windows Help for specific instructions. When connecting a monitor or tv you must  switch to external monitor. Don't forget to select the correct hdmi input on the tv, too.

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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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After installation of drivers which I get from Mr. Paul Tikkanen's link, this laptop runs windows 7 64bitmore or less satisfactorily. Many many thanks for your valuable support.But, one thing, all the ports (usb ports & sd card port) are functioning, excepting the HDMI portwhich was working properly when I had installed windows 10 on this laptop.I have installed-1)Driver-AMD Chipset-radeon-crimson-16.7.3-sb-sata-ahci.2)Driver-Audio-Realtek High-Definition (HD) Audio Driver sp71379.3)Driver-Graphics-AMD High-Definition (HD) Graphics Driver sp71253.4)Driver-Keyboard,Mouse & Input Device-sp72664.5)Driver-Network-a)Broadcom 802 11bgn WLAN Driver for Windows 7 sp70888.b)Broadcom Bluetooth Software sp71440.c)Realtek Local Area Network (LAN) Driver sp71268.6)Driver-Storage-Realtek Card Reader Driver sp71266.Is it a problem of driver or hardware (HDMI Port)?Please once again help me to solve this problem, so that I can connect my laptop with my LED TV.My email id [email protected] you.Yours-Debasish.

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I have a T470 (Win10) connected directly to a ViewSonic VG2030wm via HDMI - no docking station. The cable is known to be good, as I used it with the same monitor with a T460 without the following problem: Intermittently and sporadically the screen goes blank. It does not matter what order I turn on the devices or connect the cables. Randomly the screen will go black - sometimes the image comes back within a few seconds; sometimes the image blinks on and off for up to a minute; sometimes the image is steady and the monitor is usable for an hour or two; sometimes the image stays off for so long (about 30 seconds) that I get a "No Signal Detected" message from the monitor, only to have the image return (sometimes within seconds, sometimes within minutes, sometimes within hours). ViewSonic does not offer any updates to the driver. All other drivers on the laptop are up to date. It does not have anything to do with what I'm doing, such as a loose connection. I use an external keyboard, and the laptop itself is on a box that improves airflow, so the only vibration to the laptop is what little is communicated thru the desk, and somewhat insulated box the box. Nothing I do can 'encourage' the image to reappear on the laptop, such as disconnecting/reconnecting the cable, turning the monitor on/off, etc. Any questions/suggestions will be greatly appreciated.

A:T470 HDMI Port not working intermittently

Additional: I've removed the battery and pressed the power button for 30 seconds, then restarted the laptop w/out any change in behavior. 

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Mini HDMI port not working on my thinkpad S1 yoga. I cannot use this for my external monitor.  I Have tried different mini hdmi to hdmi cables with same result  I know the hdmi connection on the external screen is working.Can you suggest anything I can do to resolve this issue?

A:TP S1 yoga mini HDMI port not working win 10

Hi, did you manage to fix this problem?  My mini HDMI post doesn't seem to output video anymore... 

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