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11/06/2009 at 10:23AM PST, ID: 24878829
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9.0

Motherboard Fried? Green LED no response when powering up

Asked by prsbyrd in Hardware Components, Computer Motherboards, Power Supplies / UPS

Tags: motherboard fried power supply hardware failure emachines e machines T2885 no power

I am trying to repair an E-Machines T2885 desktop.
Original Problem-
Machine will not power on. No response whatsoever when power button pushed.

The obvious solution... I replaced the power supply since the original one would 'hiss' when plugged in.
Replacement power supply was installed. Power supply works on a different machine just fine. Power supplied only to 12 volt aux, processor fan, and 20 pin power supply on the mobo. Only VGA cable plugged in.
Processor fan will spin momentarily upon plug-in, green LED appears on mobo, still no response when power button pushed. I tried a different power supply with same results, except processor fan will not spin at plug-in.
I have tried reseating CPU and changing the power LED connectors around in case they were moved. I could not locate CMOS Clear pins. I however do not suspect the case has been opened since I broke the VOID label when I opened it this morning so everything should be intact.

Considering the steps taken, I feel the motherboard is bad. Can anyone confirm the signs of a bad mobo or suggest any other troubleshooting? I've read a few forums that mention EMachine mobo burnouts when power supplies go bad.
 
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[+][-]11/06/09 10:29 AM, ID: 25761673

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[+][-]11/06/09 10:31 AM, ID: 25761694

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[+][-]11/06/09 11:07 AM, ID: 25762067

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[+][-]11/06/09 11:14 AM, ID: 25762148

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About this solution

Zones: Hardware Components, Computer Motherboards, Power Supplies / UPS
Tags: motherboard fried power supply hardware failure emachines e machines T2885 no power
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Solution Provided By: cwhess
Participating Experts: 3
Solution Grade: A
 
 
[+][-]11/06/09 11:17 AM, ID: 25762173

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[+][-]11/06/09 11:59 AM, ID: 25762507

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[+][-]11/06/09 12:00 PM, ID: 25762519

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