Booting When Power On The Set - LG OK99 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 5.1 VA (CN201) and 3.3 VA(IC202) in standby mode.
 If there is no 5.1 VA, check the SMPS and if doesn't appear 3.3 VA, check the IC202.
2) Check +12V, DVCC_5V and DVCC_3.3V when power on the set.
 If the set doesn't work regardless of what the KEY3 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)
X500 X500
(24 MHz) (24 MHz)
X501 X501
(32.768 kHz) (32.768 kHz)
ONE POINT REPAIR GUIDE
IC501 IC501
< MAIN board top view >
KEY3 KEY3
(R5B64) (R5B64)
3-4
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