My sub PC is usually online for 24 hours.
I switched off the power 3 days ago and turned on today but it did not start.
Moreover, when switching on …
Push power button
↓
Repeat until all the fans (power supply fan, CPU cooler, exhaust fan) turn around with the fern and stop
↓
Press and hold the power button
↓
Power off
This was my first symptom.
Looking at Google it seems to be a breakdown of the power supply unit.
Hmm … ATX power supply …
It is around 5,000 yen in the power supply 500 W unit …
Before buying a power supply unit, I had a suspicion.
I tried to doubt the button type battery set on the motherboard.
Previously I have the experience of exchanging button type batteries inside my main PC.
First, I removed the old button battery and discharged it for 1 day.
Next, I bought a Sony CR2032 battery.
Next, it installed so that fingerprints do not adhere to the button type battery.
And I turned on the power.
Push power button
↓
All the fans (power supply fan, CPU cooler, exhaust fan) do not start with Fern
↓
Press and hold the power button
↓
The power is turned off at the judgment of the PC
Hmm? I feel that symptoms have improved since last time.
I removed the power supply unit from an available PC. And I built it in this PC.
Power on with the cover fully open
↓
All the fans (power supply fan, CPU cooler, exhaust fan) do not start with Fern
↓
Press and hold the power button
↓
Power off
That means that it is not a malfunction of the power supply unit.
The next thing I thought was cleaning the memory unit.
Disconnect the power cord and press the power button to discharge.
I pulled out the memory from the motherboard, blown by air duster, and blown inside the slot of the motherboard.
Re-set and power on with the cover open!
↓
All the fans (power supply fan, CPU cooler, exhaust fan) turned around with Fern and beeps “beep”
↓
Since I pulled out the button battery, I got the setting request screen of the BIOS, but I went for a while at F1.
↓
A startup screen of Windows 10 appears and it seems to be executing “automatic repair”!
↓
It restored by automatic repairing for about 5 minutes.
Well, I learned that dust in the memory slot will cause failure.
