This Tv came in with no backlights, audio was fine and with the flashlight test it showed the image was fine. Took measurements at led connector CNB801 and nothing. The backlights came on fine using a backlight tester so I pulled the combo PS/Main and put the board under the microscope and found a blown resistor at R8310, blown cap at C6316 and after replacing both she fired up fine. Before you assume it's the backlights look very close especially in this section.
Insignia NS-55D510NA19 backlight problem
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Re: Insignia NS-55D510NA19 backlight problem
That is R/C snubber for the MOSFET, good find.Never stop learning
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 -
Re: Insignia NS-55D510NA19 backlight problem
What is the voltage for the CNB801 going to the backlight lights. I have 45.5 volts Dc.
Also what voltage do i need to test each strip #303T C550033Comment
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by grbo92Hi,
i have one acer Nitro 5 without backlight on my desk.
Mainboard model: LA-L031P GH53Z REV 1B
Attached schematics and boardview are REV 1A, slightly different as REV 1B.
11411_LA-L031P-Acer_Nitro_5_AN515-45_AN517-41-GH53Z_Rev_ (1).zip
Repair history: customer cleaned dust and changed thermal paste, shortly after that there was no light
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