PC not detecting HDMI connected monitor.


I am trying to connect my Samsung S24B300 monitor to my PC (graphics card: AMD/ATI Radeon HD 7850 2GB) using an HDMI cable. Previously I had connected it with a VGA cable using a VGA to DVI adapter, and this worked just fine. However, what I am attempting to do is set up dual monitors. My plan is to connect my main monitor (S24B300) to my PC using an HDMI cable and my secondary monitor (Samsung Syncmaster S22B150) using my old method of a VGA to DVI adapter. But, as stated in the title, connecting the monitor to the PC with an HDMI cable does not seem to be working. I have tried switching the display from analog to HDMI, but it just shows a blank screen and then goes back to analog, I have also tried restarting the PC to no avail.

This issue has left me completely stuck and so I reach out to you for advice/solutions. I am also welcoming advice on setting up dual monitors and if there's anything I should know.

Thanks in advance!
Reply to MarkramUK
31 answers Last reply
More about detecting hdmi connected monitor
  1. hello... first test the monitors hooked up by themselves... to determine if you have some other problem... Once they both work as individual monitors, you must enable dual monitor usage in the operating system software. Your choices will be to "Clone" or "Extend" and which monitor will be your primary or secondary display... and the Display resolution for each.
    Reply to Ironsounds
  2. Hey, thanks for the reply.

    I have tested both monitors and they do indeed both work on their own. When I try to enable dual monitor usage (right clicking the desktop and then going onto Screen Resolution) there is only one monitor detected, and the second is not coming up after I manually press detect. I have also tried detecting it from the AMD VISION Engine Control Center but again, it is not being picked up.
    Reply to MarkramUK
  3. hello... I use Nvidia cards software and Windows7... and have complete success with my Dual monitor setup at first attempt... what I'm saying is it could be your AMD software version or your Windows OS... what versions you using of each? but my experience with AMD is very limited and someone else might help ya better... does plugging into one of the video card connectors disable another? try different connection combinations?
    Reply to Ironsounds
  4. Hey,

    I just tried linking a laptop to the same monitor with the same HDMI cable and it worked, so I've ruled out hardware issues on everything other than the PC, and I've tried different combinations but again, no luck.

    I'm using Windows 7, and the following is a table of all the versions of AMD (wasn't sure which you needed, I'm guessing 12.10)

    Driver Packaging Version 9.002-120928m-149042C-ATI
    Catalyst Version 12.10
    Provider Advanced Micro Devices, Inc.
    2D Driver Version
    2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS/{4D36E968-E325-11CE-BFC1-08002BE10318}/0000
    Direct3D Version
    OpenGL Version
    AMD VISION Engine Control Center Version 2012.0928.1532.26058
    AMD Audio Driver Version
    Reply to MarkramUK
  5. Hello... does both monitors show up in your Device Manager as Connected? available? Generic PnP monitor?
    Reply to Ironsounds
  6. No, only my main monitor shows up as SyncMaster SB300_S24B300HL/S24B300EL (HDMI). The second monitor is not listed at all.
    Reply to MarkramUK
  7. hello... click to update device manager list... Thats the reason why it's not working because it is not listed as a device option yet.
    Reply to Ironsounds
  8. Hi, there does not seem to be an option to update the list. The only one I can find is 'Scan for hardware changes', and upon clicking that nothing changes.
    Reply to MarkramUK
  9. I tell people all the time that ATI drivers are buggy. This is why.
    Reply to ram1009
  10. Hello... a monitor is a passive device... thus a *.inf can be installed to tell windows the name of the device and it's resolution abilities... get from their website.

    what does the second monitor say with it just plugged in the Device manager? and the main monitor not hooked up with starting windows? unknown device? or PnP monitor?

    Maybe there is a hardware update for Windows for that device... Run Windows update and look at what the hardware recomendations are.
    Reply to Ironsounds
  11. Hi,

    When only the second monitor is plugged in, it comes up in the list as 'Generic PnP monitor'. I right clicked it and clicked 'Update driver software', and after automatically searching it came up and said the best driver is already installed. Is it possible that there actually is an update available? What does 'generic pnp monitor' mean?
    Reply to MarkramUK
  12. hello... like I said they are a passive device... don't need a driver... and windows cannot read any infomation when using that device... it's no big deal being called an "Generic PnP monitor"... mine say that... and the Device manager list two of them in mine. But you can download a *.inf file from the manufacture do get it to read what ever you like and in the past would let you use non-standard resolutions in Windows.

    But all this has to go thru your video card... maybe the 2 monitors are confused as 1 monitor... try to see if there is a *.inf file for your monitors to stop the confusion?

    1: You can manually install or add a second "Device" Generic PnP monitor to your "Device Manager" list and use the Samsung driver download.

    2: Un-load your Video drivers/programs and re-install with both monitors plugged in?

    3: Try a different/earlier/Older version of Catalist?

    4: Run Windows update... for hardware drivers... This will answer your previous question.

    Always restart the computer after any driver/program change.
    Reply to Ironsounds
  13. Hi,

    I installed the drivers but there still seems to be no change. I could not find any *.inf file you mentioned :??:
    Reply to MarkramUK
  14. Hello... your one line feed back is so vague... What drivers did ya install?

    the *.inf file will be in the Samsung driver downloads for each monitor... click on the Blue "Driver" beneath the Black "Manuals" for the S24B300.
    Click on the Blue "Driver" to the right of the Black "Manuals" for the S22B150

    " .inf " is a file extension and stands for an"Information" file used in most Windows Hardware driver programs... I may be getting too techy for you...

    I listed your links for your monitors above... they call them drivers... and will be used to "Update your Drivers" for your monitors in the "Device Manager"... one at a time plugged into windows to get rid of the "Generic PnP monitor" description... or to see if Windows identifies there are 2 different "Samsung Monitors" connected... not just one...

    If Windows see two monitors it will work then... you will be GOLDEN!!!!

    The above proceedure is #1

    I listed four items above for you to try... that involve drivers... or procedures...

    Which ones are completed?
    Reply to Ironsounds
  15. Hi,

    Right, I'll start from scratch :D

    I installed the HDMI driver for S24B300. I just restarted my PC and it initially worked; the monitor displayed the Windows logo. However, I did not get further than that, it just went back to a blank screen, however progress has been made! I then plugged the VGA cable in (with the DVI adapter), switched back to analog and proceeded to be able to log in and get to the desktop. However, the resolution only went up to 1600 x 1200, and no monitors at all were detected in the device manager. I went to Device Manager, selected 'scan for hardware changes' and it successfully came back to the proper resolution (1920 x 1080) and the monitor is now known as SyncMaster SB300_24B300HL/S24B300EL (HDMI) in the device manager, but again HDMI does not work. I can only view it using analog.

    This is the stage I am at now.

    As for the four stages:

    1) I could not find a way to manually add a monitor.
    2) Didn't work.
    3) Didn't work.
    4) No change/didn't work.
    Reply to MarkramUK
  16. Extra information (couldn't edit):

    Upon attempting to install the driver for the second monitor (SyncMaster SB150_S22B150N), it just replaces the one I currently have rather than be added on as a second one.
    Reply to MarkramUK
  17. Hello... I have been editing my 2 above replys... to make them clearer... so time to time look back...

    the HDMI could be different problem and method to solve...

    First we have got to Have Windows see 2 monitors plugged into it...

    so plug them both in and tell me what the device manager says to me...OK?

    Don't over write any more... you need to add another device... Device type "Display Adapters"... and use the correct driver for the monitor not detected...
    Reply to Ironsounds
  18. When both are plugged in it still says SyncMaster SB300_24B300HL/S24B300EL (HDMI). Both are currently plugged in using DVI-VGA adapters (as the HDMI does not work) if that makes a difference. The second DVI port however does not seem to work when one monitor is plugged into it... only the top port works.

    Sorry if I'm being slow, but what do you mean by use the correct monitor and not the detected driver?
    Reply to MarkramUK
  19. Hello... clear mind... I'm Sorry if i'm being too Techy... and blogging my thought as time passes... : )

    With both monitors pluged in... and windows restarted... what is listed in your device manager when you click on monitors?
    Reply to Ironsounds
  20. With both plugged in and windows restarted, the device manager lists SyncMaster SB300_24B300HL/S24B300EL (HDMI) under monitors. Nothing else.
    Reply to MarkramUK
  21. Ok... click Action... Add Legacy Hardware... Next... Install the hardware that I... ... Next... Show All devices... Next... Have Disk... ( point towards file)... OK

    let driver install and restart windows...

    We want to get windows to see Two Monitors in the Device Manager.

    If this doesn't do it's got to be the cards drivers not telling Windows there are 2 monitors plugged in... and also not turning on the HDMI port either...

    Thats why I went Nvidia... my experience is alot of extra steps needed with the ATI's/AMD software to get things to work... in Windows.

    Like i said before, i'm not the best with advice about AMD Video cards and/or software.
    Reply to Ironsounds
  22. What file am I trying to point at? I don't have a disc and the drivers I downloaded can't be found.
    Reply to MarkramUK
  23. I'm afraid I didn't understand that last sentence... what is it I need to do if I cannot find the file to install?

    Oh I see what you mean. :D I thought ATI/AMD was meant to be easy for this sort of thing, or that's what many people say.
    Reply to MarkramUK
  24. Hello... Download the file to a location you can find it!!! from the website I listed...
    double click on the file ...they my need to extracted first... run the file
    Reply to Ironsounds
  25. Hello,

    what I mean is that even when I extract them, the only thing that shows on the list is the .inf file, and if I try to use that an error appears saying it 'doesn't contain a compatible software driver for your device.'
    Reply to MarkramUK
  26. OK...you did good!!!

    it's the Software driver then to your video card... and repost using your video card model and problem.. sorry i could't help ya... best wishes.
    Reply to Ironsounds
  27. I will do. Thanks for trying anyway! Didn't get far but got further than I did on my own.
    Reply to MarkramUK
  28. hey, did u find a solution to it by any chance?
    Reply to sarwar_r87
  29. I found this link to be explaining display connectors useful. Maybe it could help? https://www.youtube.com/watch?v=v9c1SLX7Vog&list=PL6A03...
    Reply to Omgee555
  30. Hi pals,

    I had the same problem "PC not detecting HDMI connected monitor" and I resolved it by changing my monitor's settings NOT my PC settings. There was this error message on the screen that "There is no cable connected"! You need to change the monitor's setting to HDMI. The make of my monitor was BenQ and I pushed the ENTER button on the right hand side of the monitor several times until HDMI appeared. I think other monitors might need to be set up to HDMI when they are connected by an HDMI cable to a PC or laptop. Try this before you spend money on upgrading your graphic card.

    Hope this helps.
    Reply to kambizbr
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