Question about Vizio 42 in. LCD TV
Picture is too dark
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: new vizio 42" is posterizing
I think it cause by vs voltage is high. You can try to decrease the Vs voltage a little bit. You can adjust the voltage while the TV is on. The Vs voltage adjustment is locate in the power supply.
Posted on Feb 18, 2009
check the backlight inverter and the Y-sus board the one to your left. if those are fine check the bottom right buffer board
Posted on Apr 20, 2009
SOURCE: 42" Vizio - no picture no sound
If the TV goes in standby, then it is in protection mode.
Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
Try first leaving the TV power cord unplugged for some times, let say one hour or so.
The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.
1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.
2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.
If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.
If you are in situation 2 , then there is an internal fault.
If under warranty contact the manufacturer ringing the number on the user manual
If you want to repair at your own expenses, just locate any good qualified repairer.
If you want to DIY you find parts here,
All: Appliance parts, electronics parts & more from PartStore.com
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On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem
Posted on May 04, 2009
SOURCE: no picture on vizio 42
There are several boards that can cause what you describe. Can you bring up the menu? If so that will help in the process of elimination. Is there sound? What is the model number? Have you unplugged the set for a few minutes? If you are trying to decide whether to repair or replace. If any of the boards need replacing 250.00 to 500.00 for a shop repair.
Posted on Oct 19, 2009
That white line (usually jagged) is actuallly part of the transmitted picture. However, you are not intended to see it because it is located in what is known as the 5% overscan area. Your TVs today are more than just cable ready... they are a versital, technology filled multimedia display. You can see that line because the screen size or wide mode you are using is intended for 1080p/24 signals. You have 0% overscan with this screen size setting. This allows you to see ALL of the picture, including portions of the picture the broadcaster did not intend for you to see. You can change your screen size using the Wide feature in the Setup menu. See pg.62 of your user manual for details and descriptions of the various wide modes.
Posted on Mar 14, 2010
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