ASUS P8Z77-V LX no video or usb after BIOS update

My computer was working, next day I was having problems with the boot it saw the devices but couldn't start windows, so I decided to update the BIOS version to 1502.

The update was successful, but when the system restarted there was no Video output and none of my usb devices show sings of been powered.

I took the following steep to test the system:

-cleared CMOS
-removed the Video Card GTX 560 TI and connected the cable to the MOBO
-disconnected everything but the power for the MOBO and CPU and cleared CMOS
-tried different combinations of the RAM 2, 1 and 0 sticks, resenting the CMOS. I didn't see RAM led turn on any case
-removed the battery and cleared the CMOS for 10+ minutes

So far I haven't see any changes, please help.
23 answers Last reply
More about asus p8z77 video bios update
  1. Try flashing the BIOS again using the flashback. Rename the file to P8Z77VLX.CAP
    You can find instructions in the manual for how to.
  2. alexoiu said:
    Try flashing the BIOS again using the flashback. Rename the file to P8Z77VLX.CAP
    You can find instructions in the manual for how to.


    Pretty hard to do when he cant see the output


    Does it have a built in video? If so check to see if it just defaulted to that output.
  3. It's not hard as that's the flashback for. No need for output. Actually no need to start the board also. Only the PSU has to be connected and on. Pretty cool...
  4. Yes it has a built in video, one of the first steps I did was remove the GPU and connect the DVI to that one, with no change, is also has a VGA output Ill try to use that one.
  5. alexoiu said:
    It's not hard as that's the flashback for. No need for output. Actually no need to start the board also. Only the PSU has to be connected and on. Pretty cool...


    I thought that got zeroed with a CMOS clear.
  6. A CMOS clear can't fix a corrupted BIOS.
  7. alexoiu said:
    It's not hard as that's the flashback for. No need for output. Actually no need to start the board also. Only the PSU has to be connected and on. Pretty cool...


    It appears that the P8Z77-V LX doesn't have the USB BIOS Flashback feature
  8. It seems so. I've checked only the manuals list http://support.asus.com/download.aspx?SLanguage=en&p=1&m=P8Z77-V+LX&hashedid=wUVREuJSCNu0ys0i and there is a Z77/H77 BIOS Renaming Rule for USB Flashback.
    But indeed, the feature is missing for your board.
    Do you have a spare power supply?
  9. alexoiu said:
    It seems so. I've checked only the manuals list http://support.asus.com/download.aspx?SLanguage=en&p=1&m=P8Z77-V+LX&hashedid=wUVREuJSCNu0ys0i and there is a Z77/H77 BIOS Renaming Rule for USB Flashback.
    But indeed, the feature is missing for your board.
    Do you have a spare power supply?



    I can get my hand on one
  10. Then I would firstly test with a different PSU. If still the same, it might be a BIOS issue.
  11. alexoiu said:
    Then I would firstly test with a different PSU. If still the same, it might be a BIOS issue.



    I tried a different PSU, is exactly the same, there is no change.
  12. alexoiu said:
    A CMOS clear can't fix a corrupted BIOS.


    I thought a CMOS clear restored the BIOS to factory Defaults. If he corrupted it with a bad flash that still should work.


    ACJ when you cleared the CMOS is there a button or a jumper to do that?
  13. jnkweaver said:
    I thought a CMOS clear restored the BIOS to factory Defaults. If he corrupted it with a bad flash that still should work.


    ACJ when you cleared the CMOS is there a button or a jumper to do that?



    There is a jumper, I tried a few times when I tried changing the configuration.

    Actually I tried the changing the jumper setting and removing the battery, and leaving it like that for 2 hours, then I changed the jumper and put the battery again connected the cable and still nothing.
  14. I see two options: buying a BIOS chip and replacing the board's one (if in US you can order one from ASUS eStore) or RMA-ing the board.
  15. I am looking at the manual now and are you sure your CLRTC jumper is in the normal spot (1,2)?
  16. alexoiu said:
    I see two options: buying a BIOS chip and replacing the board's one (if in US you can order one from ASUS eStore) or RMA-ing the board.



    I think you are right.

    Thank you for time and advise.

    you too jnkweaver.
  17. jnkweaver said:
    I am looking at the manual now and are you sure your CLRTC jumper is in the normal spot (1,2)?



    Yes.
  18. It isn't clear but it looks like you may need to use the MemOK function if it doesn't reboot after a Bios change.

    Also did you try the VGA onboard graphics output?
  19. jnkweaver said:
    It isn't clear but it looks like you may need to use the MemOK function if it doesn't reboot after a Bios change.

    Also did you try the VGA onboard graphics output?



    I didin't found a VGA cable, but either way thats just part of the problem, even if I get video by VGA my mouse and keyboard wont work, no usb device is working.

    Ill try the memOk, but the thing is even when I put no RAM I don't get the ram led warning.
  20. MemOK restars the system, and there is no change after.
  21. acj_cr said:
    I didin't found a VGA cable, but either way thats just part of the problem, even if I get video by VGA my mouse and keyboard wont work, no usb device is working.

    Ill try the memOk, but the thing is even when I put no RAM I don't get the ram led warning.


    OK I guess I misundertood. I thought you flashed your BIOS and now the video doesn't work. Can you see video??
  22. Did u ever figure this out........
    I have a similar situation. If I remove the GPU card I can get it to boot normally.
    as soon as I insert the GPU card i get the same thing u get.


    jnkweaver said:
    acj_cr said:
    I didin't found a VGA cable, but either way thats just part of the problem, even if I get video by VGA my mouse and keyboard wont work, no usb device is working.

    Ill try the memOk, but the thing is even when I put no RAM I don't get the ram led warning.


    OK I guess I misundertood. I thought you flashed your BIOS and now the video doesn't work. Can you see video??
  23. THIS IS WEIRD.......... i just 'fixed' it.
    UNFORTUNATELY, I was having the same symptoms with my OLD MB which I just RMAed.
    although it was also giving me spontaneous reboots.

    New System is an i7-3770K with W7

    Symptom: System runs fine with no graphic card (integrated graphics). Though I did have this symptom when I first booted it and it resolved itself. With graphic card inserted computer appears to boot windows 7 but there is no video output and my USB mouse doesn't work. The PS2 KBD does work.

    Note: I got totally confused because when I powered off, the system went into the boot problem dialog on the next boot and stops -- until I hit enter. When I realized that and hit enter it booted to the W7 tune.

    OK so it is a video problem for 1. I have a monitor with 2 inputs and the other is connected to an off computer. I turned that computer on and the monitor worked fine.

    I went in circles till I turned the off computer on, booted the new computer, THEN switched the input on the monitor. EVERYTHING was fine.

    SOMEHOW, it appears that when I turned the new computer on after installing the graphic card - it did not make a difference where the monitor was connected - the monitor input switched to the off computer and was therefore dead. Why the mouse didn't work is a mystery also.

    I say 'fixed' because I have no clue as to what is going on and if it will continue to work normally.

    If u have a clue let me know.
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