Re: LG 42PA4500, Stand by only.
Post some clear pictures of you boards and what voltages do you have before it goes into shutdown.
Post some clear pictures of you boards and what voltages do you have before it goes into shutdown.
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Willing to help but I'm no expert. -
Re: LG 42PA4500, Stand by only.
Hi guys,
I made a rookie mistake and need some help with identifying a cap on the main power supply. I removed 2 caps that I thought were the same value....ya, you guessed right, not the same. This set, 42PA4500, uses PCB:EAX64276601. I need to know the value of C351 and C502. They are located near VA TP and VA ADJ. I hope you can help! Thanks!Comment
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Re: LG 42PA4500, Stand by only.
c351 is 10v 3300uf
c502 is 80v 330ufComment
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My goal here is to be able to use boards on hand to swap into faulty sets when the faulty board is not obvious.
I will start by asking what is the format of the output from the mainboard and is it generic in any way or does it vary by manufacturer and/or model ?
And as far as I know a tcon and panel must be a matching pair because the timing of the signals and the voltages required to drive the panel are specific to the panel itself. (That may be a blanket statement that isn't true in some cases where the panel creates its own sub-voltages on its panel boards?)...01-06-2024, 01:32 PM -
Visio E601i-A3
Tv powers on and input is able to be selected/used, but the on screen menu closes as soon as it is opened and the there are some periodic "glitches" of the on screen menus in relation to position and size. I have tried all the system resets,but because the menus are not usable, i was unsuccessful. Does this seem like a panel issue? Odd that it only affects the menus and not the main input picture. I have already tried disconnecting front panel buttons assuming one was stuck down causing the input to continually be scanned or similar.
https://www.youtube.co... -
Hi All,
Need help.
I have a samsung un60j620dafxza led tv. When I plug it in it has no display, no sounds, and no standby lights.
So I opened the tv and disconnected the power to the mainboard and the backlight powered up. This according to many people says that this is a mainboard
problem. I checked the voltage coming from the stb and I read 1.3 volts on pins 1,3,5 and 7 which are low volts instead of 13 volts which i think the lcd panel
might be drawing too much power from the power supply that it prevents the right voltage going to the mainboard.... -
I came across a 50inch TU8000 that wouldnt start up properly (blinking stand-by light, backlights would cycle on and off).
When i opened it up and removed the power to the mainboard the backlights powered up and everything looked uniform.
When reconnected the mainboard but disconnected the flex cable to the panel i heard the TV startup with the intro sound.
Later I checked for shorts on the panel PCB boards but could not find anything.
When I took a look with the FLIR i noticed the 2 resistors... -
49UJ6500 LCD panel has a lighter band on top when first powered on. Goes away (or gets much fainter) after TV on for a few min. After powered off for awhile and power back on, same band appears. If powered on immediately after powering off, no or much fainter band. Running the latest firmware.
Disassembled the TV and lifted the LCD panel during testing. Band is on the LCD panel (can see the band on the panel as I lift it slightly) Backlight is perfectly even at the top edge. Double checked LCD panel alignment in the frame and is perfect but since band moved with the panel, its on...
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