Windows 7 will not boot - not even to BIOS

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  1. Posts : 208
    Windows 7 64 bit
       #1

    Windows 7 will not boot - not even to BIOS


    Having to do this post using an old iPad

    Went to boot my desktop today and nothing......no boot, no BIOS. Power is on and all fans are running. HDD can be heard spinning for a few seconds, then stops. Cannot boot from Win7 rescue disk, drive spins and then stops. Screen is dead (like no signal) and I cannot enter BIOS.

    Machine has been running perfectly for several years. If I could even get as far as BIOS I could figure things out (maybe!)

    Could this be caused by a dead CMOS battery?

    Any other ideas will be very welcome and gratefully acknowledged.
      My Computer

  2.    #2

    Could be a dead mobo. Remove the RAM to see if you get beeps which indicate mobo life.

    Unplug everything except DVD drive and try to boot a disk.

    Nothing at all on the screen, even momentarily?
      My Computer


  3. Posts : 200
    Win-7 H-Prem-x64 Linux-M-Mate-x64
       #3

    sounds like a dead Motherboard to me, like gregrocker take ram out and see if system beeps, also does anything show on the screen at all even if for a split sec.???
      My Computer


  4. Posts : 208
    Windows 7 64 bit
    Thread Starter
       #4

    Thank you both for your kind replies.

    It is early morning here at the moment and I have an urgent appointment on the golf course :), so I will try your suggestions later today and report back. Off the top of my head, the motherboard is an old Asus MA78 Pro, so I should be able to pick one up someplace.

    Anyway, must dash........since I am club captain this year, probably best not to be late
      My Computer


  5. Posts : 208
    Windows 7 64 bit
    Thread Starter
       #5

    Sorry, forgot. There is nothing on the screen. It doesn't even blink. Just says "No signal" and returns to blank black.
      My Computer


  6. Posts : 78
    Windows 7 Ultimate x86
       #6

    first to check is the graphics card. the pc might be just fine but graphic problem made it unable to display anything to the screen. try remove then replug the graphics card.
      My Computer


  7. Posts : 6,330
    Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM
       #7

    If replugging the GPU and RAM doesn't help, try using the onboard graphics.
    It may be a failing PSU that doesn't have enough life left to power up with the GPU installed.
      My Computer


  8. Posts : 208
    Windows 7 64 bit
    Thread Starter
       #8

    Right, this is what I have tried based on all your kind suggestions.....

    Removed the graphics card and connected to onboard graphics. Nothing.

    Removed all RAM modules. No beeps from board, just total silence except for fans.

    Removed all HDDs and tried to boot from Win7 disk. Nothing.

    Removed and replaced CMOS battery. Nothing.

    I am now beginning to agree with Gregrocker that the board is dead. I'll see if I can source another during the next couple of days and, in the meantime will try anything else I can think of.

    Thanks again for all your helpful suggestions. I am most grateful.
      My Computer

  9.    #9

    If the mobo is within warranty period of one year, Asus Tech Support should replace it for you.
      My Computer


  10. Posts : 208
    Windows 7 64 bit
    Thread Starter
       #10

    I'm afraid it is well out of date - by about 4 years!! They seem to be very thin on the ground

    I should of course have said it is an ASUS M4A78 pro board, not MA78.

    I shall keep looking.......
      My Computer


 
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