yust take the memorychip which is in slot 2 out of the computer, boot, and see what happens
if the problem is solved, the memorychip you have in hand is dead.
if its not solved replace the remaining memorychip in slot 1 with the one you took out of slot 2
if the problem is solved, the memorychip you have in hand now is dead.
if problem still occurs it is
or: both memorychips are bad
or: some other problem...