Can you theoretically open a switched-on Ps4 pro to hear whether a defect has or can be repaired, I think my Ps4 has coil whine, when I start a high-resolution game it starts rattling continuously, I could open it there and at least find out where exactly the noise comes from because I'm not quite sure.
If it could be repaired that way, I wouldn't have to bother to send it in for repairs, I wouldn't want to wait that long or lose memory data in the process.
Theoretically you can do that. But you have to be careful not to touch anything otherwise you could get electrocuted
I would therefore not recommend it to you
You can theoretically open a switched on Ps4 pro to be able to hear
Yes you can.
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open and at least find out where exactly the noise is coming from because I'm not quite sure.
Most likely from the power supply or the graphics card.
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If it could be repaired that way, I wouldn't have to bother sending it in for repairs
Neither you nor the repair service can fix it. Coil whine is completely normal.
Unless you poke around in the power supply with a screwdriver or pack it in, that's no problem.
The power supply itself is separate from the motherboard of the PS4, it has a plastic cover. There are only harmless voltages on the motherboard itself, so you should be more careful not to ruin your PS4.
"Safe voltages" also cause electric shock
No. 3.3v (not used on the PS4), 5v and 12v are low voltages. The reason why higher voltages in combination with higher currents can be dangerous is that higher voltages can transport electricity more easily. A person has a certain electrical resistance, which low voltages below 24-60V can't overcome.
For example, if 5v were dangerous (or could cause an electric shock), Lightning (the charging port on most Apple mobile devices) would not be compliant because Lightning has open electrical contacts. Cigarette lighter in cars would then also not be in accordance with the regulations, since these are also known to have open contacts.
