Philips HP L1502 - Repair Flow Chart; No Display; Front control key does not work

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HP L1502
Repair Flow Chart
Front control key
does not work
Check
Front control panel
(Key & SW)
Yes
Check
Signal connectors
Check main panel
Yes
No Display
Check Mains cord
& LED of monitor
Check
Power board
Input
Yes
Check
video signals input
interface
Check inverter
panel
No
Video source
Yes
Check
Inverter panel
No
OK
Check fluorescent
lamp
Check main panel
No