Solved PC turns immediately off

December 30, 2016 at 07:42:08
Specs: Windows 10 Pro x64, 2.793 GHz / 4096 MB
Started happening yesterday. When I turn on my PC the fans start up and than turn immediately off. The motherboard light remains on BTW.

I should mentioned that I have had 4 failed hard drives in the past 1 year. This all started when I changed my PSU. The PSU that I have I got from a shopkeeper really cheap as I was short on cash and it was used. No stickers or anything on it.

Now PC is causing this issue. It sometimes does start up and runs normal but when I turn it off it starts this giving this issue or turning off right after the fans start up. I made a video to explain it clearly. I should mention that I have taken out ever thing and put it back after cleaning it up.
Video link:
https://youtu.be/MuSzKMamSYo

Computing Tech Net

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#1
December 30, 2016 at 07:46:49
✔ Best Answer
You seem to have made it clear that everything points to you fitting a poor quality PSU.

Overheating can also cause this symptom but for it to happen so fast it would have to be something quite severe. An example would be if the heat sink has become detached from the CPU.

Always pop back and let us know the outcome - thanks

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#2
December 30, 2016 at 08:15:51
Like I mentioned Derek. I removed everything and cleaned all the dust using an air blower. Took off the CPU heat sink. Put on new thermal paste and put it back. Everything is in order.
Also when I does start up after some tries the CPU temp remains just normal.

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#3
December 30, 2016 at 09:41:32
The problem is obviously the cheap power supply. You don't have to pay big bucks for quality, but you do have to know what to look for when selecting one - 80 plus efficiency rating, single +12v rail, active PFC, decent warranty, etc. The Corsair 430W regularly goes on sale for about $20 & it is a very good unit. It gets recommended in these forums all the time.

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#4
December 30, 2016 at 12:10:47
Thanks guys for the help. Going to get a good PSU next week. Actually the guy said that its a good Antec pSu he has lying around. Didn't have stickers but he said they got removed. I believed him and figured it should be good. Antec has some good psu's but unfortunately i was ripped off.

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#5
December 31, 2016 at 04:15:36
Hi Agalpha,

am concerned about the FOUR failed Hard Drives in a year.
What were the failures, and could the hd's no longer be used, if so, why?
.
If the psu is responsible for this, it suggest spiking higher voltages (anyone else have thoughts?) and should be binned soonest.

However, make sure you have adequate backups when the new psu is fitted 'just in case'.

Good Luck - Keep us posted.


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