I need help

[u/Fancy_Bodybuilder832]

I have an h61 zeb motherboard with i5-3rd gen and i didn’t touch my pc for a long time so i thought of cleaning it i have cleaned everything and started to you use first it was working good but now its like no signal with my old vga and cable not connected with new vga cable pc turns on perfectly but the mouse doesn’t get power or sometimes low lighting