- Jan 8, 2016
- 18
- 0
- 4,510
One day I pushed the ON button and nothing happened., nothing at all. Green lite on MOBO, that's it. No prior indication of trouble. Jumpered the green/black wires on 24 pin connector and fan turned. So I metered the PSU and found half the power circuits were dead.
Bought a new MOBO and PSU, put everything back together.Computer started to power up but quit, then repeated power up 2x and that was it.
My computer history: My case is an X-large tower that is 17 years old into which I keep replacing parts. Complete rebuild Jan. '16 except PSU. Reset switch & wiring is new, power-on switch is old. fans are all new.
My first step was to replace MOBO with same Asus H-97 Plus. No Joy, so I next replaced the PSU and this may be indicative. Computer stqrted to power up- all fans came on and HD chirped, and then it shut down and repeated this 2X, then stopped altogether.
I broke one of the soldered wires off the power switch but soldered it back on - seems to function ok but when I metered it found that it is only a momentary switch, not on/off. That is to say, current only passes between terminals when button held down. IS THIS THE WAY SUPPOSED TO BE? If not, then its the problem.
I have tested with every thing except 3 HDDs disconnected & removed.
This is weird as I should have found the problem by now but sometimes we just overlook the obvious. What do I do next if I breadboard (assemble outside the case) and still nothing happens?
Now comes the part I don't want to talk about. When I first removed the CPU from old MOBO, laying on top of the socket was a tiny piece of metal that looked like one of the CPU pins and there appeared to be one missing. I can't see all that well. The thing is, sockets don't just damage themselves while in operation as I can't explain how this came to be. I did not discover this until I removed CPU & transferred to new board, The question is, could this in any way have damaged the CPU?
My final question is whether a faulty CPU or peripheral can prevent the basic power-up? I understand that it prevents the POST but in my case I'm not even getting full power-up.
Bought a new MOBO and PSU, put everything back together.Computer started to power up but quit, then repeated power up 2x and that was it.
My computer history: My case is an X-large tower that is 17 years old into which I keep replacing parts. Complete rebuild Jan. '16 except PSU. Reset switch & wiring is new, power-on switch is old. fans are all new.
My first step was to replace MOBO with same Asus H-97 Plus. No Joy, so I next replaced the PSU and this may be indicative. Computer stqrted to power up- all fans came on and HD chirped, and then it shut down and repeated this 2X, then stopped altogether.
I broke one of the soldered wires off the power switch but soldered it back on - seems to function ok but when I metered it found that it is only a momentary switch, not on/off. That is to say, current only passes between terminals when button held down. IS THIS THE WAY SUPPOSED TO BE? If not, then its the problem.
I have tested with every thing except 3 HDDs disconnected & removed.
This is weird as I should have found the problem by now but sometimes we just overlook the obvious. What do I do next if I breadboard (assemble outside the case) and still nothing happens?
Now comes the part I don't want to talk about. When I first removed the CPU from old MOBO, laying on top of the socket was a tiny piece of metal that looked like one of the CPU pins and there appeared to be one missing. I can't see all that well. The thing is, sockets don't just damage themselves while in operation as I can't explain how this came to be. I did not discover this until I removed CPU & transferred to new board, The question is, could this in any way have damaged the CPU?
My final question is whether a faulty CPU or peripheral can prevent the basic power-up? I understand that it prevents the POST but in my case I'm not even getting full power-up.
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