LG NP8540 - Page 39

3-16
No 3.3 V
Is the Vin 18 VA
supplied to IC900, L900?
Around the IC900 parts OK? (RLC)
Check the 18 V.
Replace the weird one.
Replace the IC900.
YES
YES
YES
NO
NO
ELECTRICAL TROUBLESHOOTING GUIDE
No 3.6 VA
Is the Vin 5.2 VA
supplied to IC904, L907?
Around the IC904 parts OK? (RLC)
Check the IC903.
Replace the weird one.
Replace the IC904.
YES
YES
YES
NO
NO
POWER SUPPLY ON MAIN BOARD