few days ago my pc stops booting. (3 beeps). i removed all the ram and cleaned them and inserted on the slots. it started work again.
but now there is a red LED near memory marked as cr1my is turned on. (refer attached pictures)
i went through all technical manuals and there is no indication what this LED refers or indicating.
i have not overclocked and all 4 slots of memory is populated. please help me about this issue. 
