One. The machine is unresponsive, the power lamp is not on and the power is not on.

1. Check whether the power supply line is normal.

2. Check whether the wiring heads on the motherboard are well connected, such as 6pin wiring, 20pin power supply head, etc.

3. Check whether the motherboard has material burning

4. If there is a power indicator on the motherboard, see if the indicator is on.

5. Trigger the switch to see if the motherboard can start

6. If the main board indicator lights are not on, connect the green and black lines of the power supply to see if the power supply is available.

Normal, finally replace the power supply to test whether the motherboard is normal

Two. The motherboard can power but has no memory self-checking sound.

1. Check if the CPU power supply is well connected.

2. Remove the heat sink of the North-South Bridge and touch with your hands to feel if there is a heat, including power chips, I/O chips, clock chips, etc.

3. All peripherals of the motherboard are unplugged, including board card, VGA line, KB line, hard disk line, leaving only the necessary power supply line of the motherboard. Then unplug the power in memory to see if the motherboard has an alarm sound, like 3680, insert a buzzer test.

4. If you unplug the memory without alarm, clear BIOS to see if the motherboard has alarm sound.

5. Remove the CPU radiator or fan and touch the CPU with your hand if it has temperature.

6. Re-insert the motherboard

7. Re-insert CPU

8. Replacement of CPU

9. Press North Bridge, CPU and South Bridge gently by hand

Three. The display does not respond after the motherboard is turned on, but it has memory self-checking sound.

1. Check whether the power and signal lines of the display are connected properly.

2. Check whether there is material falling off beside the main board display chip.

3. Turn on BIOS and press the Num Lock lamp on the keyboard to turn on and off normally.

4. Clean BIOS

5. Touch Beiqiao with your hands and feel if it's unusually hot.

6. If the screen enters the system without display during boot-up self-check, check whether the host screen is cut, press Ctrl+Alt+F1/F2/F3/F4 by hand, or boot F8 into safe mode or VGA mode into the system to see if the motherboard displays normally.

Four. Host can't enter the system

1. Boot in BIOS to see if you can find a hard disk under BIOS

2. Check if the hard disk cable is well connected

3. Listen to whether the hard disk rotates properly

4. Sweep the hard disk with MHDD to see if there is a bad way.

5. Rewrite master boot record with DiskGen

6. Determine whether the system is viral

7. Rebuild the system

8. Rebuild the system after replacing the hard disk

Five. Host boot screen

1. Turn on F8 and press F8 into safety mode to determine if the incorrect installation of the driver causes it.

2. Rub the golden finger in memory with an eraser

3. Clean the memory slot with sandpaper and insert several more memory tests without sandpaper.

4. Replacement of memory

5. If you change the memory motherboard or the screen, you can judge that it may be a motherboard problem. Replace the motherboard and test it.