No Booting When Power On The Set - LG OM7560 Service Manual

2. NO BOOTING WHEN POWER ON THE SET

The set doesn't work when press the power button on the top board or the remote control.
2-1. IC501
2-1-1. Solution
Replace IC501 on MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Check the +12 VA (CN202) and 3.3VA (IC503) in standby mode.
  If there is no 12 VA, check the SMPS and if doesn't appear 3.3 VA, check IC503.
2) Check +12 VA, +5.1 VA, 3.3 VA, DVCC_5V and DVCC_3.3V when power on the set.
- If the set doesn't work regardless of what the KEY1 changes high to low while pressing the power button.
X500 and X501 work normally but, if you can not power on the set, replace the IC501 with a new one
on the main board.
2-1-3. Service hint (Any picture/ Remark)
KEY1 KEY1
(R518) (R518)
ONE POINT REPAIR GUIDE
X501 X501
(32.768 kHz) (32.768 kHz)
< MAIN board top view >
< MAIN board bottom view >
X500 X500
(24 MHz) (24 MHz)
PWR_CTRL PWR_CTRL
R559 R559
3-4