Philips TFT LCD Colour Monitor Service Manual page 32

32 190B4 LCD
Repair Flow Chart
No Light output
Check
No
Power board
12VDC
Yes
Check
No
video signals input
interface
Yes
Check
OK
Inverter board
720VAC with load
No
No
Replace inverter board
Front control key does
not work
Check
Front control panel
(key & SW)
Check
Signal connectors
CN402, CN900
Check IF Board
BAD power PI
Board
Video source
Check fluorescent
lamp
Check IF Board
Yes
Yes