Booting When Power On The Set - LG CM9750 Service Manual

3. NO BOOTING WHEN POWER ON THE SET
The set doesn't work when press the power button on the FRONT_CTRL board or the remote control.
3-1. IC501
3-1-1. Solution
Replace IC501 on MAIN board.
3-1-2. How to troubleshoot (Countermeasure)
1) Check the 5.6 VA (CN106) and DVCC_3.3 V (IC505) in standby mode.
  If there is no 5.6 VA, check the SMPS and if doesn't appear 3.3 V, check IC505.
2) Check 5.6 VA, +12 V, FL+, FL-, an +39 V when power on the set.
  If the set doesn't work regardless of what the KEY2 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.
3-1-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
< MAIN board top view >
R522 R522
PWR_CTRL PWR_CTRL
< MAIN board bottom view >
X501 X501
(32.768 kHz) (32.768 kHz)
KEY2 KEY2
(R526) (R526)
(24 MHz) (24 MHz)
3-4
X500 X500