Power On - Shuts Off

2005 Media Center PCm7170n, Pentium D 830 3.0GHz
- Had some wakeup, power on issues but always was able to get it up and running
- Added 4G memory, upon closing it up and restarting no power at all, power button pushed and nothing happened
- Took it to a solutions shop and they diagnosed bad power supply (possibly causing older wake up issues?)
- Brought it home, ordered new power supply and replaced
- Now it turns on and startes up for 7-8 seconds then shuts down
- No beep codes
- Checked for arching, unplugged and removed all accessories and still same result, checked new supply voltages-OK,
put in old supply- back to no power at all, back in with new supply still shuts down after 7-8 seconds.
Any Ideas?
I have a second machine so I've been able to recover all my files, trying to use this as a learning tool on computer hardware, to make it a little less like magic!
thanks

HI
I got the issue,
when you pusing power button it shows power for 7 to 8 seconds and then shutdown,
and like your Machine fans turn on for 7 to 8 secnds then turn off automatically,
its because you have some issue with your motherboard, like power capactors etc. if it can repair with cheap cost then make it repair otherwise change your motherboard with new one, its the only solution.
I have seen this issue so many times with many Machines, only i could fix it via repair the motherboard or chaning the motherboard to a new one.
Hope this helps!
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MarkusLarockus wrote:
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