Re: TV won't turn on high pitched noise from power supply board
What is your TV exact model number?
What is your TV exact model number?
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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: TV won't turn on high pitched noise from power supply board
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(EDIT: sorry, jumped the gun here. My bad.)Last edited by WildPuppy; 04-12-2018, 03:01 AM.Comment
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Re: TV won't turn on high pitched noise from power supply board
That board attached to the power supply is the LED driver circuit for the local dimming array system. Most likely putting the board into a TV with a bigger panel requires more current.Did I leave the soldering iron on?Comment
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Re: TV won't turn on high pitched noise from power supply board
He indicated that the noise if from this board:
https://www.badcaps.net/forum/showthread.php?t=64328Never 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: TV won't turn on high pitched noise from power supply board
Yes, it is they called "intelligence sensor", but why the sound is coming out from there?
Actually, it's a smaller panel for mainboard, but yeah, it is suppose to be smth about current insufficiency.
Is there any way to be sure whichever is the source of the issue?
@budm Its model: LG 47LX6900
Mainboard came from 55LX6900Comment
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Re: TV won't turn on high pitched noise from power supply board
Hmm, shopjimmy has no info for that model for me to find out what are on that board. I can see one part, BU1, so can you push on the inductor with plastic or wooden stick to see if the noise will change?
https://www.badcaps.net/forum/attach...1&d=1523494009Last edited by budm; 04-12-2018, 09:21 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=24809Comment
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Re: TV won't turn on high pitched noise from power supply board
Yes, i did and it turned out that sound directly coming from that sucker
From its tiny hole (you can see in the picture)
When i pushed other capacitors on this board, sound also changed.
What do you think it can be?Attached FilesComment
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Re: TV won't turn on high pitched noise from power supply board
It could be caused by resonance in a coil. I would attempt to resoolder all coils and resolder BU1 to see if it helps.Did I leave the soldering iron on?Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
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Anybody...
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