Hi folks,
   Have this machine where DVD section accepts a disc but doesn't spin - gives a code F498.
   As some folks justly complain when known faults are not revealed -
    
   'No disc - laser not lighting' - checked IC5201 where pins 3/5 were low, and A+5 was low at 1.3v. The +5v comes from the unregulated +6v which was OK, Q33011 was O/C.
   I my case, checked Q33011, and the 5v was OK.
   Any thoughts - Chris.