NowI have just moved the desktop from the floor back to its location and it won't power on. I've moved it back to the floor where I could open it, and I observed that when powering on the PC, sometimes the PSU fan spins for a split second and the GPU LED blinks for a split second, but then both turn off again and nothing happens.
Theproblem: The computer sometimes only turns on after a delay. After I press the PC's power button three scenarios can happen: The system turns on normally and boots up. The system turns on after several seconds of delay (3 to 20 seconds) and boots up. The system does not turn on. I have read many messages about BIOS POST etc and power supply
Howto check if system will power on AC adapter alone. To check if the system can power on with just the AC adapter, remove the battery and disconnect it carefully. Connect the AC adapter and power on the system. If it works, inform the technical expert. To reconnect the battery, plug the cable onto the motherboard and secure the bottom panel