PC Computer Solution The display screen is dark but the fan is on

condition when the power is turned on, the psu fan and processor turn on but the display on the monitor is dark or blackscreen. Tried testing the RAM and hard drive but it turned out to be still normal. The next step was to check the PSU or power supply as a result the voltage was not strong
So the solution to this problem is to replace the PSU with a stable voltage so that it can be strong enough to lift the display on the PC monitor
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