Philips 15LCD35 Service Manual page 45

Troubleshooting
General Features
No. Symptom Cause
1 No screen Input error of inverter connector 1) Bend the pin legs of P802B connector ->
P502 and Pin 21 connector
being slipped out
Cracked components and
soldering at tuner board
2 Dark screen 1) Defective LCD lamp
2) Defective inverter
3) Input error of inverter
3 Broken OSD Defective the font ROM of
display IC501
TV and external input
No. Symptom Cause
4 No sound Defective Reset IC of IC902
- Speaker Defective MSP3410D of
- Earphone IC901
Defective B+(8V,5V) of
IC903,904.
5 Video color Soldering IC201 and IC502,
beat noise IC501 or masking it short.
6 Video Jitter P501B Pin20 connector
defective.
connector
Check Point
recheck them
2) Check and repair the IC806,807
SI4925,IC801 SI786,IC803 SI4808.
1) Check and fix P503B connector
2) Check and fix the components at P502
LCD module and at main board.
3) Check Pin50.
1) Check and repair tuner board and main
board
2) Solder Q101.
1) Replace the inverter
2) Replace the LCD lamp
3) Check the connector input.
Check and replace the font ROM of IC508
Check Point
1) Check volume and speaker
- Sound comes out only when being inputted
into Audio L/R
2) Check after replacing IC902
3) Replace IC901
4) Check and replace B+ of IC903,904.
Check and re-soldering.
Check the P501B Pin20 connector and repair.