Computer repairing & assembling

How to repair VGA input with no signal?

Before i started to cleaned up the system unit i logged off first the PC and then the UPS. I using vacuum to clean and removed the dust inside the system unit. I disconnect first the SATA 3 connection to hardisk drive and the power supply as well. When i am about to finished to clean up the system unit i reconnect the SATA 3 into hardisk drive and the power supply. Then i begun to turn on the PC but unfortunately there was no signal and its going to sleep and the green LED become red and it beep 5 times.

How to repair VGA problem???

Okay the 5 beeps is your computer telling you that there is something wrong with it somewhere.
If you can access the internet go to your computer manufacturers web site and look for information about error beeps.
If you have no luck there then you will need to go to the motherboards web site and try and find what the beep codes mean
These beeps you are hearing are built into the BIOS and are there to tell you where to start looking when you have problems with your computer
Good luck

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