I have a Vizio VX552XVT and I recently started hearing clicking sounds from the power supply board. It is a constant clicking noise and it makes the picture flicker on and off repeatedly. There is a red led light that flashes on the backlight inverter board as well. When the picture stays out the red light on the inverter board stays lit. The more and faster it clicks, the more the picture flashes and more likely the screen will go black. Does this mean my power supply board is going bad? I visually inspected it and dont see any blown caps. What do in need to determine where the problem lies?
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Re: Vizio VX552XVT Screen Flashing on and off
Can someone please Help me? -
Re: Vizio VX552XVT Screen Flashing on and off
Does the problem occur immediately upon power on, or only as the set warms up?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
Does the flickering get worse over time slowly, or is it more or less constant until it finally fails?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
OK, do you have a digital multimeter?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
No but I will go get one right now. What do I need to test?Comment
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Re: Vizio VX552XVT Screen Flashing on and off
There is a signal the main board produces called BL ON, ON/OFF, ... it will tell the backlight inverter/LED driver to light the panel. If it is changing rather than being steady, it is the main board that is at fault, whereas if it is static it is the power board, inverter board or LED board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
OK. Is it labeled on the main board or do you have a schematic. If not I will send you a picture.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
It will usually be labeled on one of the boards, if not it can usually be figured out from how the inverter board circuit is laid out. Yes pictures would help greatly. A cheap digital multimeter will be all you need. Do not get an analogue meter.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
Is it Vizio VF552XVT, not Vizio VX552XVT?
I cannot find VX, here is the VF POWER SUPPLY. Is this the one you have?
http://www.shopjimmy.com/vizio-0500-...upply-unit.htmLast edited by budm; 09-30-2013, 04:44 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: Vizio VF552XVT Screen Flashing on and off
Sorry i took so long but here we go. Here are some pics if you can direct me as what to test. When it is flashing the power board voltages vary going out but seem to be steady on the main board. What part exactly needs to be tested as i dont know where the BL on/off circuit is. Thanks again. And the power boerd in the link posted earlier is the same as mine.Attached FilesComment
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Re: Vizio VX552XVT Screen Flashing on and off
On this connector
https://www.badcaps.net/forum/attach...1&d=1380592429
we need to be able to read the individual labels next to each pin. If you can't get your camera to take a good photo there please list off the labels directly.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
Ok Im home from work and ready to check some voltages if someone is available to help! Which pins need to be tested?Last edited by agent11927; 10-01-2013, 03:30 PM.Comment
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Re: Vizio VX552XVT Screen Flashing on and off
Does anyone know what pins i should test?Comment
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Hello,
YouTube video of the problem encountered: https://youtube.com/shorts/q7TLNv36LUo
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HI all,
hope someone point to the possible issue before I start buying replacement parts.
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Backlight stays on all the time,
Sound works fine.
screen keeps changing form black to full picture in about 1sec intervals.
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I have disconnected backlights and flashlight test confirmed that picture is still doing the same.
Disconnecting left and right ribbons on...
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