Question about Vizio Televison & Video
No blown fuses, capacitors, or other components on the power board or other boards. I've tested the standby power which is 5v and I get 5v when the mainboard is connected and when it isn't. The mainboard is heating up when power is applied to it so it's definitely getting. I inspected to power cable which seems to be in tact. I'm not sure what other troubleshooting I can do.
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Posted on Jan 02, 2017
SOURCE: VIZIO GV42LHDTV Got TV after
If the TV does not start with the new audio board, and if it does start with the old one, then the audio board that you recently purchased is defective.
About the board : 0500-0507-0230; that is the power board (PSU). If you could see the Vizio logo, that means that TV started, and that the power board was OK without need for testing. When the power board is defective, either the TV does not give any sign of life, or the TV goes in standby mode from start and does not wake up. In that case the led stays blinking to warn you that there is an incorrect voltage from PSU.
If the TV is freezing with Vizio logo, that means that at most the faulty part is the main board.
Also, you say that there is no backlight. No backlight means that the screen is completely dark. If there is no backlight you won't be able to see the logo or any other picture.If there is no backlight, then the problem is usually the inverter.
Here a brief article summarizing how to test PSU and inverter: How to test an LCD TV.
Here all parts for this model:GV42LHDTV.
Posted on Feb 11, 2011
Im having similar problem and with my limited knowledge of lcd tvs and the voltages ALL being good except the pwr on or sw on voltage from the main board to the power supply which tells it to switch everything on Im guessing that something is going wrong on the main board. In the condition where it freezes it (the power on V) which switches everything on i get varied voltages such as 2.5 or 3 or (the normal 5v) and then when nothing powers up (blank screen) i read 0v on pwr on voltage but all my other voltages are corect (24v to inverter, 12 v to main board, 5v, etc.) Im guessing from researching this is that there is in improper voltage somewhere in the main board circuit. I have been unable to find it so i may order another board and post back.
Posted on Aug 21, 2013
SOURCE: My 50 Samsung Plasma TV lost picture, but still had sound. Replaced capacitor on Zsus and had Y-sus buffer up serviced. Still no picture and maybe a power problem. Any troubleshooting suggestions?
Make sure the power board are producing the correct voltages = or - 10 %. Look for domed electrolytic capacitors too. You can get repair kits and complete boards from here: TV Parts Universal TV Stands DLP Chips ShopJimmy
Posted on Feb 02, 2016
Testimonial: "Thanks - Thus far I have only checked the standby voltage to the main board. I also found this link with a tutorial to check the other voltages. The nice thing about this ink is that they are demo-ing it with the same Samson Plasma TV. https://youtu.be/GReg9cPDP-c Thanks again."
The led is what makes the picture try replacing that it it's the only one you didn't change out
Posted on Aug 31, 2016
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