System doesn't post, no bios and no beeps

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guyhammett

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Sep 6, 2013
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10,510
I have a system running XP that has suddenly stopped posting at all. Power is on, PSU fan runs as does the CPU fan, CMOS battery is good, motherboard LED is on and the hard drive spins up but there's no video output and nothing else happens.

To turn it off I have to cut the power because it's not posting so holding the power button has no effect, not does the restart button.

I have tested the board with 2 other PSU's that are definitely good and no change. I have removed the RAM all together , nothing, 1 stick, still nothing.
So I got another identical model motherboard and chip from Ebay which I installed thinking it must be that and guess what..... no change! I have tried starting with everything unplugged but the monitor and still nothing so I'm stumped.

The hard drive is good as it's currently plugged into this computer dragging off the family photo's as we speak.
It's not the PSU
Unless I was really unlucky and bought a MOBO and CPU with an identical issues it's not them.
The graphics are onboard only so it's not a graphics card issue and as said I've tried another board to no avail.

Stumped, any ideas gratefully accepted and mulled over before binning it.

Cheers
Guy
It's not the monitor
 
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guyhammett

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Sep 6, 2013
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I've tried 2 other monitors and different cables. There's nothing on screen at all. I have also tested the power button as well and it's not that - boo but thanks for the thought.
Guy
 
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guyhammett

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Sep 6, 2013
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Alas it was 2005 so there's no comeback or warranty however I'm not sure it is an issue with the motherboard as to avoid having to reinvent XP I did buy and try another motherboard of exactly the same model and that gave the same outcome so thinking it's maybe not the MOBO after all.

The MOBO came with a working chip already installed as well so that's another item off the list of possibles.
 
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JustSimple

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Sep 5, 2013
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Try changing the RAM if possible, and leave 1 RAM in there while testing take out any peripherals and test it with the bare minimal. Another words no SATA connections just the main power and put the power chord in update me.
 
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guyhammett

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Sep 6, 2013
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Already tried that, have taken out and or disconnected everything bar one stick of RAM, I have 3 to choose from and have tried all separately. All give the same result.

Apart from breadboarding it I can't think of anything else to try. I have a limited amount of patience and time as I've a triumph to service and err some leftover work to do too.

Thanks for your help so far.
Cheers
Guy
 
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guyhammett

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Sep 6, 2013
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I don't understand how as they system's been running absolutely without issue for ages. I have made no changes, added nothing but suddenly .............. nothing works.

Must do weekly shopping now, living the dream as always.

Thanks again for support so far.
Guy
 
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