Old PC starts and shutdown randomly within 2 seconds to 1 hour

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amish

amish

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So as I have been discussing in some other thread. I am planning to purchase new PC.

But before that I am just testing the old PC which I almost NEVER used. (harddisk used only for 45 hours in total)

I started this PC after like 8-9 years. But it looks completely brand new.

It has 3 fans in total. CPU Fan, Cabinet fan and PSU fan.

Here is what happens - randomly:
  1. I press power button, all fans start and switch off in 2-3 seconds (without beep sound)
  2. I press power button, all fans start and switch off after 5-10 seconds (after beep sound)
  3. I press power button, all fans start and OS boots (and then switches off from 2 mins to 1 hour)
  4. After switching off, it does not restart by pressing power button OR pressing reset button
  5. To restart either I have to turn off/on wall switch OR press power button for 7-8 seconds, release it and then press it again.
I was able to install Linux yesterday and then it stayed on for almost 1 hours (or may be little less) and then switched off directly.

I believe it is SMPS problem but just wanted to ask if there could be any other reason, like motherboard going bad etc.?

Thank you.

Photos attached - in case someone wants to have a look.
cabinet.webp
smps.webp
 
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Oh you mean the wall socket. I thought you meant socket on motherboard.

No its not the socket problem because i connected PC to 3 different sockets in 3 different rooms and it gave problem everywhere.
 
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Try a different power cable coming to the PC. I had a similar problem once. The problem was with the PC end. All h/w guys disagreed with me but after changing that 25/- buck cable all was well. A friend had a similar problem but in his case it was the data cable from hdd to Mobo which was the culprit. Other two problems could be as others mentioned 1) SMPS or 2) RAM (clean contacts of ram with an eraser).
 
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👍🏻Ok so that's out that leaves the other three suspects. SMPS, RAM & data cable from HDD to Mobo.
Actually I meant the socket on the PC end where we connect the power cable.
 
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Its not data cable to HDD because if I remove it... it still happens.

RAM - i dont know as right now I dont have spare RAM to test.

But I am not sure that faulty RAM can switch off the machines, instead it will corrupt the data.

Assuming RAM is good - i think its SMPS or motherboard.
 
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@Smh - I took it to repair center and they changed some chip on motherboard.

I tested it for 1 day. Then got busy with other things and old PC is just sitting there unused.

I plan to restart it soon.
 
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