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PC wont boot- no video output

Discussion in 'Hardware' started by dongs, Sep 21, 2008.

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  1. dongs

    dongs Thread Starter

    Joined:
    Sep 21, 2008
    Messages:
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    We have an Aspire T310 desktop with a P4 CPU

    When I power on, the fan revs up to max and the HD LED flickers but the machine does not provide a video signal and from the sound of the HD, Windows is not booting. There are no HW beeps signalling an error.

    I swapped out the power supply and tried both the HD and the memory in another machine. All are fine. I also reset the CMOS memory using JUMPER JP1. I also tried booting without the HD and CD connected to the motherboard but the Acer logo does not appear on the LCD screen which works fine on another machine.

    I guess there must be a problem with the CMOS (corrupted), the motherboard or the P4. Can you help me narrow down the problem without swapping out the P4? Is there a test point I can use to identify the problem?

    Many thanks

    Checks:
    no splash screen, no BIOS screen, no beeps
    Fans- both, rear spining fast
    LEDS- power on, flashes twice
    HD and CD-ROM LEDs flash, CD drive can be opened
    Reseat- reinserted memory
    Changed PSU
    Reset CMOS memory (jumper JP1)
     
  2. Triple6

    Triple6 Moderator

    Joined:
    Dec 26, 2002
    Messages:
    52,922
    First Name:
    Rob
    Its rarely the CPU, but there's no way to test the board or CPU without swapping in another CPU or testing the CPU somewhere else.

    Have you also disconnected al headers such as the audio and USB ports and card reader that are connected inside. Also disconnect all devices connected externally except the monitor. You can even disconnect the front panel LED's and switches and use a screw driver to short the two power switch pins on the motherboard to turn the computer on in case it's a broken switch.
     
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