1, static before moving: analyze and consider where the problem may be before starting the operation;

2. From the outside to the inside: first check the external power supply, equipment and lines of the computer, and then open the chassis;

3, first soft and then hard: start with software judgment, and then start with hardware.

Second, the specific operation of the fault:

1. No power display on the computer host or monitor: check the external power cord of the computer and the power plug of the monitor;

2. No display on the monitor or no sound in audio: you can check whether the video card or sound card is loose or whether the plug is plugged tightly;

3. Host horn ringing: Errors can be judged according to the number of sounds, such as CMOS( 1 ringing memory refresh error, 2 ringing memory check error, 3 ringing 64K basic memory error, 4 ringing system clock or memory error, 5 ringing CPU fault, 6 ringing keyboard fault, 7 ringing hard interrupt fault, 8 ringing video memory error, 9 ringing motherboard RAM and ROM check error or graphics card error, 65438+. AWARD's BIOS (normal system 1 rings, CMOS setting error or motherboard RAM error 2 rings, graphics card fault 3 rings, keyboard error 4 rings, motherboard RAM and ROM error 10 rings, memory, graphics card or power failure keeps ringing), and then enter CMOS to find the wrong setting and modify it, but it still doesn't work. Only open the chassis to check the hardware.