LG LHB976 Service Manual page 104

MAIN SET ONE POINT REPAIR GUIDE
When you turn on your set, it will display "PLEASE WAIT" on front panel, and it will not boot-up
normally.
1-3-9. Main Board
1-3-9-1. Solution
Replace MAIN board.
1-3-9-2. How to troubleshoot (Countermeasure)
1) Please remove IC500, IC502, IC503, and then check the Impedance between each signal
(DATA, ADDRESS, and so on.).
2) If there is some Impedance ( a few ohm or infinite ohm) especially power source trace,
PCB via might be broken. You'd better change main board.
1-3-9-3. Service hint (Any picture / Remark)
< MAIN board top view >
2-89
IC503
IC500
IC502