What is the problem with the computer?

Question

Iron

Hi everyone, PC won't turn on for the second time. However, he worked for many years without interruption.
I turn it off, but I can’t turn it on anymore:
There is no image on the screen, the coolers are spinning, for 40 seconds and the PC reboots again and then 2 minutes and reboots again - then it’s normal, but there is still no picture.
I reset, disassemble, reset the BIOS, and after a few reset attempts (or maybe it's not about it at all, but about trying to turn it on), it turns on.
There is no sound from the speaker of the system unit at this moment, even if you pull out the RAM, video card, i.e. mother does not respond at all.
Now I was sitting, working, for an hour everything was hanging, there was a hum in the speakers, the power button, even if you hold it for a long time, does not respond.
The PC turned on again from 10 times, but at the same time it did not reboot at startup, but there were no sounds from the Motherboard either.
Assumptions:
1. PSU capacitors
2. Motherboard
capacitors There are no swellings, I looked at both the PSU and the mother.
At the same time, closing the PSU without a mother, everything turns on and does not turn off for a few seconds.
AIDA 64 shows whether I don't know if this is normal or not:

COUID:

Maybe someone knows, has this happened? Thanks in advance!

Answer 1

On the AIDA 64 graph, there is a drawdown of 12 volts. It is in working order, and at startup there is a load, respectively, the drawdown is even greater and therefore the inclusion is unsuccessful.

Answer 2

It looks a lot like problems. With the PSU, it's more likely that the capacitors "dry up". I advise you to change all the output capacitors, they cost a penny.

Answer 3

Yes, it is very similar to capacitors. As for swelling, this is not the main sign of their defect. The main one is the so-called. ESR (equivalent series resistance). If it is large, then even with a nominal capacity, the capacitor must be replaced.
You cannot measure the ESR with a multimeter, you need to purchase such a device (it is universal, it will come in handy in a thousand other cases): It is
sold here , as well as in other constructive forms (for example, with a ZIF connector) and from dozens of other sellers, you can find cheaper.
And then - solder the capacitors and measure the ESR. If it is less than one ohm (for high-voltage - less than 2 ... 3 ohms) - solder back. If more, replace with a new one.

Answer 4

And what kind of nonsense is this on the + 12V line? If this is true - change the PSU. Well, or as they advise here - solder the conders if you want to tinker.