JVC LT-22HG45E - Troubleshooting Guide; Power Does Not Turn on

TROUBLESHOOTING GUIDE
(LCD SECTION)
POWER DOES NOT TURN ON
Is F501 broken?
Is there voltage C502
305VDC?
Change F501.
No
Yes
Check D507, D508, D518, D510
and peripheral circuit.
No
Yes
Check IC501 and peripheral
circuit.
No
Is there voltage at pin6
of IC501 21VDC?
Yes
Change R510 and peripheral
circuit.
Yes
Is there voltage Q501
169VDC?
Yes
Is there voltage at pin5
of IC501 21VDC?
Check IC501 and peripheral
circuit.
Yes
Is there voltage at pin 8
of IC501 169VDC?
Check D505 and peripheral
circuit.
No
No
Is there voltage at
pin1 of IC501 5.7VDC?
Check R516, R534 and
peripheral circuit.
Change POWER PCB.
Yes
Yes
Yes
Yes