LG CJS98F - No Booting When Power on the Set

3-4
ONE POINT REPAIR GUIDE
2. NO BOOTING WHEN POWER ON THE SET
The set doesn’t work when press the power button on the FRONT 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 5.6 VA(CN300) and DVCC 3.3 V(IC306) in standby mode.
 If there is no 5.6 VA, check the SMPS and if doesn’t appear 3.3 V, check IC306.
2) Check 5.6 VA, +12 V, F+, F-, an VH 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)
< MAIN board top view >
X500
X500
(24 MHz)
(24 MHz)
X501
X501
(32.768 kHz)
(32.768 kHz)
KEY1
KEY1
(R53D)
(R53D)
PWR_CTRL
PWR_CTRL
(R508)
(R508)
IC501
IC501