I have a Element ELEFW327 LED with no backlight. I only see one board in the whole TV. I read where chip U11 can go bad giving results like this so I replaced it and still the same. I can see the picture using a flashlight just no backlight.
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Re: Element LED No Backlight
Please read these and report the Voltage readings:
https://www.badcaps.net/forum/showth...327#post510582
https://www.badcaps.net/forum/showth...327#post466043Never 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
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Re: Element LED No Backlight
Your readings do not have the result as these:
https://www.badcaps.net/forum/showpo...97&postcount=4
What did you use for GND?
Also what do you get on the diodes?
https://www.badcaps.net/forum/showpo...40&postcount=1Never 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
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Re: Element LED No Backlight
OK, how about the reading of that link to post #1 for the voltage son those diodes? i wonder if you may have the same problem as shown in that link.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
Comment
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Re: Element LED No Backlight
The readings are high, that white connector with two pair of wires ( red, gray, red, gray) that go to the LEDs, Can you take the reading at each pin? So far it looks like you have open LED or open connection in the LED string (LED are connected in series like Christmas lights so if one goes open circuit then the whole thing will not light up.
And what are the Voltage rating of those two caps, one is next to the LED connector, and another one is close by?Last edited by budm; 07-23-2015, 10:28 PM.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
Comment
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Re: Element LED No Backlight
Originally posted by CraigR View PostZero volts on all the connectors for the LED's Big cap is 10uF 450v and the other is 33uF 200v
We will need good clear pictures of the bottom side of the board.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
Comment
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Re: Element LED No Backlight
The Cathode of the Diode that I marked in the picture is part of the Boost Converter circuit (youi can see SMD power MOSFET and the inductor right next to taht diode), so if you are not getting any DCV at the Cathode with ref to GND, then you have dead boost converter problem or it is not getting any input to feed the Boosted circuit, you will have to trace that out.
This is not going to be an easy tracing due to the board is double sided.
Pictures provided by SHOPJIMMY. http://www.shopjimmy.com/catalogsear...ement+ELEFW327Last edited by budm; 07-24-2015, 10:07 AM.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
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