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Computer has power but won't turn on!

by =tango= / November 5, 2009 2:30 AM PST

Hi peeps,

So my computer was working fine yesterday, I got up this morning to find that it wouldn't boot up.

It cannot be a problem with the PSU as the motherboard lights are on. I've checked all the connections to make sure nothing is loose, everything is fine. I have also tried unplugging everything but still nothing. I've even tried discharging the CMOS data by changing the CCMOS jumper and removing/replacing the button battery and ATX power connectors. Nothing seems to work.

Any ideas would be greatly appreciated.


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It's a dead PSU
by Jimmy Greystone / November 5, 2009 2:39 AM PST

It's a dead PSU. Just because you get standby power lights illuminated on the motherboard does NOT mean that the power supply is still good.

I can't count the number of PSUs I've replaced in the past year, and at least half the time the standby power light is still on, but darned if the computer won't boot until I replace the PSU. At which point it fires right up.

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by =tango= / November 5, 2009 3:03 AM PST
In reply to: It's a dead PSU

Ok, I didn't realise that! I'll replace the PSU and hopefully, fingers crossed, it will solve the problem. Thanks for the advice, I'll let you know how it goes.

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Found the problem...
by =tango= / November 5, 2009 6:37 AM PST
In reply to: Ok

Yes you were right, it was the PSU that has failed, I only got standby lights on the motherboard and no fan movement. I tried to boot with nothing attached and it didn't work. To confirm it was defiantly the power supply I opened it up to find a blown capacitor.

Thanks for your advice! Happy

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