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That's unusual. It usually worked well for me and my friends. Probably an issue with the CPU and power supply unit. Does the machine start but not display any signal, or does it completely fail to turn on?
It functions properly, all lights activate and spin smoothly. However, there is no signal detected. I've already checked my GPU on an older system and it operates correctly, so the issue isn't there.
The GPU functions properly, and during my previous troubleshooting effort, connecting an older configuration resolved the issue. This confirms the GPU is in good condition.
The motherboards from ASUS USA include an ASUS Q-LED feature for CPU, DRAM, VGA, and boot device LEDs. Do any of these activate or flash?