In the past few days, randomly my computer crashes and the monitors lose signal of the pc, but an awkward thing happens: the sound continues for a few seconds (15-30 seconds) after the monitors lose signal. Then I have to hard reset the computer.

I have already tried:
- update the nvidia drivers (proprietary, tested)
- checked the temperature
- reset alsa to the default settings

What can I do more to try to solve this?

If needed, please ask me for the log files you need I will be pleased to send them you, I have not posted any because I dont know what is needed