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Power Problem, Compaq Presario


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#1 a_yts0718

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Posted 11 July 2012 - 06:28 PM

Hello,

My grandmother has a Compaq Presario SR5210NX, it doesn't power up but Compaq was nice enough to include a troubleshooting light on the back of the power supply (no light=bad power supply, flashing=bad peripheral, solid, not flashing=all is well). The light was flashing with everything plugged in so I unplugged everything and light stayed on, I one by one plugged in each peripheral and light remained solid each time until the motherboard. So I unplugged everything again and plugged the motherboard up first, the light flashed. Just wanted to see if you would agree it would most likely be the motherboard. Would like a second opinion before buying a new motherboard.

Thanks In Advance

Adam

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#2 dpunisher

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Posted 11 July 2012 - 07:11 PM

Two main problems on those, power supplies and motherboards.

I this was me, I would throw another cheapie used ATX PSU at it to absolutely verify a motherboard concern. Examine the motherboard. Any swollen/bulged/blown caps? Look around the CPU. Any blown/melted mosfets/vregs? If yes to either, you can assume the mobo is faulty. Caps can be replaced cheaply if you have rudimentary solder skills. Remanufactured/surplus mobos usually run~ $35-45 shipped from Hong Kong.

Don't forget something silly. Some screw or extra/miscellaneous piece of metal might have come loose, and shorted something. Turn the case upside down, anything fall out? You might loosen all of the motherboard screws, move the board away from the backplane and see if it will post. Or better yet, remove the board from the case, hook up the power supply(or a replacement supply) to see if it will post.

Wish I had better diag advice. HP/Compaq desktops run darn near 50/50 on power supplies vs motherboards as being faulty.

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#3 coxchris

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Posted 12 July 2012 - 11:44 AM

PSU are FRU's I would replace the PSU first before the motherboard because PSU are standard and checl that isn't a motherboard issue

the motherboard is going to tough to replace it because HP/compaq installed windows version as OEM so it going to be difficult to find exact motherboard or similar type of motherboard. It may be even discontinue

FRU's = Field Replacement Units

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