I Have a Vizio VX552XVT and most of the bottom half of the screen is darker than the top half. It fades to a darker shade but still displays a picture. The backlight inverter board has a red light on it that flashes on and off continuously. The screen will flicker sometimes as well and the red light will go on and off with the screen flicker and make a clicking sound when it does it. Could this be a bad inverter board?
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Re: Vizio VX552XVT Inverter problem?
Here are some pics if anyone can help. The Clicking sound is coming from the board in the middle of the tv. I assume it is the panel that supplies the power.
Please help if you can. This is my first time taking apart a tv. I am also including a picture of what the screen looks like with the darkening effect. All of the capacitors look fine also.
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Re: Vizio VX552XVT Inverter problem?
This is an LED backlit TV, correct?
If so, appears that there is an issue with the bottom LED strip. (shorted LED(s))Muh-soggy-kneeComment
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Re: Vizio VX552XVT Inverter problem?
This is an LED backlit TV, correct?
If so, appears that there is an issue with the bottom LED strip. (shorted LED(s))Muh-soggy-kneeComment
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Re: Vizio VX552XVT Inverter problem?
Ah, That is strange. Actually it doesn't look like a backlight problem, but I don't know what could be wrong. There are some other members on here that will know more ...Muh-soggy-kneeComment
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Re: Vizio VX552XVT Inverter problem?
Is it normal for the red light on the inverter backlight board to flash red?Comment
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Re: Vizio VX552XVT Inverter problem?
Это именно та проблема, подсветки. Светодиоды часто перегретый в результате максимальной яркости. Эта работа является не столько сложно, как требуют в отношении точности. Обязательно используйте низкотемпературного припоя для пайки светодиодов. Но не имея опыта такой работы лучше не делать.Comment
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Re: Vizio VX552XVT Inverter problem?
This is exactly the problem the backlight. LEDs are often overheated as a result of maximum brightness. This work is not so much difficult as demanding as to the accuracy. Be sure to use low-temperature solder for soldering the LEDs. But having no experience of such work is better not to make.Comment
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I just got this tv today and it appeared to have no backlight on. After taking off the rear cover and checking again in the dark I can see that MAYBE one quadrant is lit.. But still it's quite dim. I was going to check the LEDs with my tester, and I found LED 1 and LED 2 + pins on the wire from the inverter, but I couldn't identify a ground. Nonetheless I tried using a mounting screw on the inverter board and also the chassis as ground but regardless my tester reads 300 which is what it reads when there is no voltage draw.
I don't know how exactly to test the inverter itself. Is it... -
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