...look like that your VGA card had a problem...unplug the power cord from your CPU and then...if you know how to open the case of the CPU then you can try to take out your VGA card from the motherboard...cleaning the VGA pin with soft and smooth cloth...then put it back to the motherboard...and also try to take out your memory from the motherboard and use the same as you cleaning the VGA and put it bank in the motherboard...and then try to turn in on again...if it's still a problem then try to use your VGA card to other motherboard and test it...if the problem still persist then you have to buy a new VGA card...
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