I haven't worked on an ATX PSU before only LCD PSU and motherboards.
So my dad brought an E-machine in for repair, I don't know what the complaint was, but I figured it out real quick.
I was in the kitchen at the time and my dad plugged it in and all the lights in the house started flickering, and I heard battery backups in two different rooms kick off. I thought we were having another rolling brown out. It stopped and I walk out in the living room and ask my dad if he saw what I saw. He said it came from the machine he plugged in and that he unplugged it immediately.
I was intrigued and look at that back and went down to smell it to see if it had gone bad or something. But noticed the receptacle on the back of it was damaged. I asked him if he felt a tingling sensation or shock when touching the case or when he plugged it in he said no.
I plugged it back in, no flickering of lights or battery backup kicking off, and I powered on the computer and it works fine.
My first thought was why didn't the breaker trip?
My second thought was what would cause this?
I have AFCI combo breakers in my panel so it should have tripped if there was a fault of some sort. I push the test function on each of them and they work fine. About two weeks ago the same circuit that this computer was plugged into tripped due to bad extension cord, replaced the cord and everything was fine. So I know AFCI is working normally.
I was curious, I opened the PSU and inspect the damaged area and noticed 2 polyfilm caps grounded!? one on hot and one on neutral.
What purpose does this serve?
It's an FSP GROUP ATX-250PA.
P.S: I plan on repairing this, flattening out the case and salvaging receptacle from one of the scraps I have here.
*I may not, it's only 250W and has alot of capxon caps in it.
So my dad brought an E-machine in for repair, I don't know what the complaint was, but I figured it out real quick.
I was in the kitchen at the time and my dad plugged it in and all the lights in the house started flickering, and I heard battery backups in two different rooms kick off. I thought we were having another rolling brown out. It stopped and I walk out in the living room and ask my dad if he saw what I saw. He said it came from the machine he plugged in and that he unplugged it immediately.
I was intrigued and look at that back and went down to smell it to see if it had gone bad or something. But noticed the receptacle on the back of it was damaged. I asked him if he felt a tingling sensation or shock when touching the case or when he plugged it in he said no.
I plugged it back in, no flickering of lights or battery backup kicking off, and I powered on the computer and it works fine.
My first thought was why didn't the breaker trip?
My second thought was what would cause this?
I have AFCI combo breakers in my panel so it should have tripped if there was a fault of some sort. I push the test function on each of them and they work fine. About two weeks ago the same circuit that this computer was plugged into tripped due to bad extension cord, replaced the cord and everything was fine. So I know AFCI is working normally.
I was curious, I opened the PSU and inspect the damaged area and noticed 2 polyfilm caps grounded!? one on hot and one on neutral.
What purpose does this serve?
It's an FSP GROUP ATX-250PA.
P.S: I plan on repairing this, flattening out the case and salvaging receptacle from one of the scraps I have here.
*I may not, it's only 250W and has alot of capxon caps in it.
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