]I cleaned my PC 2 days ago..... cleaning means nothing just opened the casing and cleaned the dust using a small brush.... did not removed RAM or any other component.... After I cleaned my PC it switched on as usual and I was able to perform successfully. On the next day It successfully switched on but there was no DISPLAY on the monitor...... And after about 15 seconds, it Restarted and there was NO BEEP sound as well.... I\'m not that much Technical and I need help.. What can I do for this ????????????????
Switch off the power supply, open the case, and look for a disconnected wire. You could have knocked one loose (or intermittently touching) when you 'dusted'. Especially look around the lower right portion of the motherboard where the small wires from the case's front panel devices connect.