After the computer is turned on, the display screen does not respond, and the motherboard does not sound a warning after unplugging the hard disk, but there is a warning when unplugging the memory graphics card. Is the hard disk broken? That's not true.

Non-replaceable hardware testing generally adopts the minimum system method (Baidu! ! ! )

After unplugging the hard disk, you can boot into the BIOS, so the CPU and motherboard are fine.

After unplugging the hard disk, the boot can enter PE, which works normally and the memory is fine (there are many problems with the hard disk).

After the computer is turned on, the display screen does not respond. If it can be judged that the motherboard and CPU are working, it is mostly the problem of graphics card, display screen, power supply and display screen line. If you can't judge, you can only use professional tools or change the hardware test factory.