so I got this tv in, and soon as I power on the tv lights up 1 sec then lights turn off but tv stays on, so I did the flashlight test and I still see the picture when I press menu, so I bought a used inverter off ebay and still same thing, so what could it be?
samsung ln40a500t1f, tv turns on, inverter shuts off
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Re: samsung ln40a500t1f, tv turns on, inverter shuts off
Pictures, pictures, pictures.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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Re: samsung ln40a500t1f, tv turns on, inverter shuts off
OK, this TV use balancer board to drive the lamps. There is small connector on toward the top of the board, there should be some labels like FB, LD, etc. We need the voltage reading on the LD pin. There are some more things to check on the balancer board also, it can be bad lamp.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=24809Comment
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Re: samsung ln40a500t1f, tv turns on, inverter shuts off
OK, this TV use balancer board to drive the lamps. There is small connector on toward the top of the board, there should be some labels like FB, LD, etc. We need the voltage reading on the LD pin. There are some more things to check on the balancer board also, it can be bad lamp.Comment
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Re: samsung ln40a500t1f, tv turns on, inverter shuts off
More likely a CCFL tube gone than a mainboard issue. Did you know--You can turn that Annoying 'melody' off in the menus!TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
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Re: samsung ln40a500t1f, tv turns on, inverter shuts off
What is the P/N of that power supply/inverte board combo? BN44-XXXXX?
How about the post 5 I ask for the voltage readings?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=24809Comment
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Re: samsung ln40a500t1f, tv turns on, inverter shuts off
It's a ccfl bulb I had a samsung just like this one and did the same thing. If you take the screen out and turn the tv on you will see the back light turn on and you will see which ccfl bulb is bad.Comment
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by Egidio85good morning, I have a samsung UE55F8000SZ tv that turns on, shows the logo and turns off after 1-2 seconds.
This defect happens continuously, hearing the classic click of the relay every time.
Power supply board BN44-00636B
disconnecting the mains and lamps from the power board always causes the same problem.
Is it normal that without anything connected this power supply turns on and off cyclically?
any suggestions on what to check?
thanks in advance
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