Question about Televison & Video
I just bought a Vizio 47" model VO47LF. Randomly the picture freezes and sound goes off. There is no response to the remote or the switch panel. I have to unplug it and plug it back on and it comes back on with a very good picture. This has happened about three times but I am concerned since the set is not even a month old.
It sounds like a main board failure but it could be the power board as well, to find out your going to need to test the power supply voltages when it quits
Posted on Nov 27, 2017
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Posted on Jan 02, 2017
the LCD TV is overheating. Solution A) allow air circulation. B) set up a small fan behind the TV C) once the set is cooled down save your preferences
Posted on Apr 05, 2009
this could be one of two problem. first, check if you have back light. If you do then the problem is with the M/B. Second, if you don't have back light then the inverter is bad and needs to be replace.
Posted on May 20, 2009
There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
Please post back what you find.
Posted on Nov 14, 2009
SOURCE: vizio 47" lcd, no picture,
Power on the unit in the dark room then shine with the flashlight directly in the screen, you will barely see the images. This is because your backlight is not functioning. The following reason is the caused.
1. Power supply - missing B+(supply voltage) coming from this board feeding the inverter board. This is caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible resistor.
2. Inverter board - even the B+ is good from the power supply, if the fuse, driver transistor, driver transformer is faulty no output to the backlight resulting to black picture.
3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.
Diagnosing the fault is technical and if you don't have necessary tools and test instrument and can't fix it yourself, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
Posted on Apr 06, 2011
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