What should I do if the computer boot display shows no signal?

time：2025-07-12 09:01:06 Smart Hardware

What should I do if the computer boot display shows no signal?

How to troubleshoot the failure of the computer without display when it is turned on (check whether there is a bulging capacitance).

Step 1: First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated.

Step 2: If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, whether the capacitors around the CPU are damaged, etc.

Step 3: If not, then clean the dust off the motherboard and check if the computer is OK.

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