One of the cuases is due to some dirts on LGA socket, so if you fixed your pc or removed your cpu recently you my find some dirt or dust on the LGA pins which can prevent some CPU connectors from touching the pns. This is happened with me where the screen was blank and there was not any sound at all even I removed the RAM just to listn to the fualt sound but there wasnt any.
i am a student of diploma in electronics and telecomm
can anyone suggest me projects related to the below domains:-
electrical and electronics