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How to test if your mobo is fried

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Name: deacons323
Date: January 18, 2005 at 17:55:05 Pacific
OS: xp
CPU/Ram: 1gig
Comment:

I've had alot of responses but I need better assistance. How do you know if your mobo is fried and second question is, is it more possible for your psu to have a shortage in it or that your mobo is fried?



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Response Number 1
Name: ham30
Date: January 18, 2005 at 18:41:25 Pacific
Reply:

Swapping or take them to a computer repair shop and have them teated.


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Response Number 2
Name: tom529
Date: January 18, 2005 at 21:36:03 Pacific
Reply:

yeah, only way to know for absolute sure outside the manufacturing center is to take known working goods and putting them into a suspect system board. beware though. conventional wisdom says a bad component can destroy otherwise good units. when reposting could you give a quick summary of other posts and the things you have tried and failed?


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Response Number 3
Name: elric
Date: January 19, 2005 at 04:27:16 Pacific
Reply:

G'day,

Heed tom529's words well. Just swapping things in and out can result in the same problem being created.
What affects are you noticing? ie do any of the drives spin? Do LEDs light up? Is there any sign of life (sorry, but I didn't read your original post)?
Solving these problems on your own is difficult if you have don't have any electrical experience or any test equipment.
For the power supply, you would need to load it to its rated output (amps) and then check the supply voltages. This would require low value, high wattage resistors connected to the outputs (+12V and +5V mainly)and then you would probably want to "soak" test it for about 24 hours.
The motherboard is a little more problematic: you would need a power supply with a current limited output, so that you could set it to a safe value and then increase it until the voltage drops. The resulting current would then need to be checked against the expected load of the motherboard.
Of course, half the battle is won if you observe what is happening and check the components for obvious signs of damage (ie black marks on the motherboard, cracked ICs, damaged tracking- particularly ground returns- funny whining noises from the PSU and localised heating or hot spots)or wear.
Have you also ruled out IO cards and drives?
Good luck,
Elric


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