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Old 05-04-2018, 10:15 PM   #25
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Join Date: Feb 2010
City & State: S.F. Bay area
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Default Re: BenQ Q22W6 Capacitor Replacement

If the board has four lamps, one pair for top edge, and another pair for the bottom edge then you will disconnect one of the two pair of the lamp and put the test lamps and fire up the board to see if the lamps will stay on, if it does then you know that one set of the original is good.
There is possibility of have one bad lamp in each pair of lamp assembly, so you will need 2 pair of test lamps or you can try using combination of lamps hookup to narrow down but that takes too much time for me, I have many test lamps so it is not a problem for me to use all 4 test lamps first to verify that the power supply/inverter board is good or bad.
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.

Voltage Regulator (LDO) testing:

Inverter testing using old CFL:

Tear down pictures : Hit the ">" Show Albums and stories" on the left side

TV Factory reset codes listing:

Last edited by budm; 05-04-2018 at 10:21 PM..
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