LG BPM55 Service Manual page 49

NO BOOTING WHEN YOU TURN THE UNIT ON
When you turn on your set, it will blank/ no displaying Main Menu on Television/ Monitor,
and it will not boot-up.
3-8. IC501 (MPEG IC)
3-8-1. Solution
Replace IC501 on main board.
3-8-2. How to troubleshoot (Countermeasure)
1) Please check 1.2 V of C505, C506, and C507 on main board.
Please check 3.3 V of C517 and C518 on main board.
Please check 1.5 V of C515 and C516 on main board.
2) If it doesn't work even though IC150, IC151 are no problem, IC501 MPEG IC could have problem.
3) After changing it, if the set is still no booting, check main board refer to item 3-9.
3-8-3. Service hint (Any picture / Remark)
C515, C516
(1,5 V)
ONE POINT REPAIR GUIDE
C505, C506, C507
IC 501
C505, C506, C507, C515, C516, C517, C518, IC501
< Main board top view >
3-36
(1,2 V)
C517, C518
(3,3 V)