I have never encountered this phenomenon. No, it’s not phenomenon – it’s anomaly that defies logic.
My computer was left for 1 week in a mixed standby hibernate state. I think it’s S4, don’t remember. It was plugged in to UPS. When I wanted to wake it up from standby, it didn’t. Then I pressed on power button on my case and it made no difference.
Tried testing PSU alone, cooler was spinning. Used multimeter to test voltages and all was within normal range. Sent my under warranty motherboard to PC repair shop, they checked, said it works and updated BIOS as a bonus. Received motherboard back and same thing.
This time I took motherboard, CPU, RAM module and PSU to a local PC repair shop. Yes, that’s second PC repair shop! They tested, all was working but when I tried to turn it on at home, again it didnt. Plugged power cable to UPS, disconnected UPS from mains to make sure PSU runs from UPS battery and it didn’t work. Tried different power cable, it didn’t help. Tried in different rooms but to no avail.
I am going crazy. Nothing makes sense. This is unreal.
CPU: AMD Ryzen 5 3600X
Motherboard: Gigabyte B450 Aorus Elite
RAM: 2x8GB Corsair Vengeance LPX
PSU: Corsair TX650M