Solutions to the problem that the monitor shows no signal after the computer is turned on: 1. Check whether the motherboard light is on, whether the CPU fan and power supply fan are rotating; 2. Clear the CMOS; 3. Remove the memory stick and wipe it with an eraser , and then plug it in; 4. Press the BIOS chip on the motherboard tightly to make it tightly connected; 5. Replace the host power supply.
#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
What should I do if the monitor shows no signal after the computer is turned on?
The computer display shows no signal in the following situations:
1. Pay attention to whether the motherboard light is on, the CPU fan is not turning, and the power supply fan is not turning. If there is no alarm, it is estimated that the motherboard may be more damaged;
2. If the CPU frequency set in the CMOS of the jumper-free motherboard is incorrect, it may also cause a no-display fault. This can be solved by clearing the CMOS;
3. The memory stick is not oxidized. Remove the memory stick and wipe it with an eraser before inserting it again. The general problem can be solved;
4. Press the BIOS chip on the motherboard tightly to make it tightly connected; if the fault persists, eliminate it;
5. Try replacing a reliable host power supply; if the fault persists, it is the motherboard. There is something wrong with the bus and it needs to be sent for repair.
Related content:
Fault example: The motherboard does not start, there is no display when booting, and there is a graphics card alarm sound (one long and two short)
Cause of failure: Generally the graphics card is loose or damaged.
Solution: Open the case and re-insert the graphics card. Check whether there are small foreign objects in the AGP slot, otherwise the graphics card will not be inserted into place; for motherboards that use voice alarms, you should carefully identify the content of the voice prompts, and then solve the corresponding fault according to the content.
If the alarm still persists after the above measures are taken, it may be that the chip of the graphics card is broken. Replace or repair the graphics card. If you hear a "beep" sound after turning on the computer and the self-test passes, but the monitor is normal but there is no image, then insert the graphics card into another motherboard and it works normally, then the graphics card is incompatible with the motherboard and the graphics card should be replaced.
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