Laptop freezes tightly, how to determine the cause?

Question

Iron

I have a used laptop. Often, at different intervals, it freezes tightly - neither the mouse nor the keyboard reacts. If a sound was played at this time, then it loops and the only solution is to reboot. From the well-known repair - the connector for the PSU was repaired, because there was a bad contact. How can I diagnose what exactly is the problem and which component is not working?

Answer 1

First of all, check if the fan is working to cool the laptop - at different times - most likely a different load and departure after heating, the percentage overheats ... as an option - which OS? What are you listening :) ?

Answer 2

Try load testing like AIDA64.
You can see if it's overheating.

Answer 3

I have a cow, such a gray one, sometimes it does not give milk, how to treat it? :)
Please add more data to the question, the laptop model is complete!