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Old 11-25-2016, 08:56 PM   #15
budm
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Join Date: Feb 2010
City & State: S.F. Bay area
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Line Voltage: 120V 60Hz
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Default Re: Hitachi LE55A6R9A - No backlight

You need to find out if your meter is good and working or not first, wrong data will not help troubleshooting the problem.
If the meter is good then we need to find out if the LED driver circuit is getting the BL-ON signal to turn on that power section on or not and go from there.

Hitachi 850118727 Power Supply
http://www.shopjimmy.com/hitachi-850...wer-supply.htm

BTW, your meter does not have that high of the frequency bandwidth to measure high frequency AC Voltage.

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Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809

Last edited by budm; 11-25-2016 at 09:17 PM..
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