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Power Supply Dead?

L

Lepke

Weaksauce
2FA
Joined
Jun 24, 2002
Messages
121
The house took a hit by lightening yesterday. PC was on, and of course, it immediately powered down along with all of the other equipment in the office. Dead - PC won't power on via my box power switch. I reset my bios to no avail. I removed the 24 pin connector from the motherboard and jumped green to black ground, and the power supply fires up along with my case fans. So, thinking that the power supply may still be partially smoked, I run out and buy an ATX power supply tester. When I hook the tester up, the PS and case fans power up. All of the LEDs on the tester are on with the exception of the -5v LED. It remains off. I can only assume that the -5v LED should in fact be on. My questions are:

Can anyone confirm if the tester should show -5v LED on?
Can anyone enlighten me for what the -5v circuit is used?

I could just run out and buy a PS, but would rather determine the failed part first. I hope the motherboard is alright, but I fear that is my next venture.
 
Lepke said:
The house took a hit by lightening yesterday. PC was on, and of course, it immediately powered down along with all of the other equipment in the office. Dead - PC won't power on via my box power switch. I reset my bios to no avail. I removed the 24 pin connector from the motherboard and jumped green to black ground, and the power supply fires up along with my case fans. So, thinking that the power supply may still be partially smoked, I run out and buy an ATX power supply tester. When I hook the tester up, the PS and case fans power up. All of the LEDs on the tester are on with the exception of the -5v LED. It remains off. I can only assume that the -5v LED should in fact be on. My questions are:

Can anyone confirm if the tester should show -5v LED on?
Can anyone enlighten me for what the -5v circuit is used?

I could just run out and buy a PS, but would rather determine the failed part first. I hope the motherboard is alright, but I fear that is my next venture.
Click to expand...

-5V stopped being used as of the ATX 2.0 spec, so it's perfectly normal for a modern PSU to not have a -5V rail.
 
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