Vizio VX42L 42 in. LCD TV - Answered Questions & Fixed issues

You may use 85 degree capacitors, but the life time will be short. You may find the right capacitors from {Digi key} company.

I wouldn't replace all the capacitors if none look bad. If you own a multi meter test the PSON (power switch on) terminal and see if you have voltage there, if you do it should change, either go higher or lower when you push the power button, if that happens then you have power board failure if not its in the main board.

Change the main board. Before that confirm that the tcon is working well.

1. When the TV powered up, please measure the 24V, 12V & 5V are there, if one voltage is missing, you may have a defective power supply. 2. If the power supply lost the 24V source, you may unplug the power supply connector on both the inverter board, then power it up, if you got the 24V back, you do have a defective inverter board, you may unplug them one at a time to locate the bad one. 3. If the power supply & inverters are good, you may have a defective main board. The common problem on the main board is that a voltage regulator is bad, you may use your millimeter to measure them 1 x 1. The out put voltage (on the heat sync) should be 1.25V + the control voltage (Pin 1), for example: if the control pin voltage is 0, the output voltage should be 1.25V, if the control voltage is 2.05V, the output voltage should be 3.3V, if one of them is out of range, replace it, you may find the part from Digikey Co. The part number printed on the regulator is AMC1117. Good luck!

Vizio VX42L HDTV10A No sound, No picture, logo lights up.

Contact the authorized dealer.

Capacitors, in the power supply area. Just about all flat panel tvs use cheap Chinese made capacitors. They either dry up or short. Fix is simple, and tv will be working in no time. A special monitoring circuit checks "ready" voltage, and if it's not there, tv will not operate.

on your remote control there is input button. Press that to the tv level. There are other settings for box tops etc

There's no 3.2 v off U33 (main module) I wasn't able to find AMC1117, So I used a Radio shack LM317T. this supplies 3.3v to video processor and associated circuit. this won't blow fuse.

When you plug in the set, does the Vizio emblem turn Orange?

Check your remote, there should be a "ZOOM" feature that allows you to change the size of the picture. It should be at the bottom of the remote.

That sounds like an inverter problem. Check the capacitors on the inverter boards. There will be two on each board. The master inverter will be on the far left side, and the slave will be on the far right side. You will have to remove the metal covers over the inverter boards. Should be 4 small phillips head screws. If the capacitors have bulging tops, replace them.

You should be able to change the brightness levels in the menu.

There are several things that could be wrong. When you plug in the set, is the Vizio light orange? When you try to turn it on, does it turn white?

Dim the lights in the room, grab a bright flash light. Turn on the set and shine the light on the screen. Do you see a faint picture? If you do, you have a backlight problem. Let me know what you find

I take it you are referring to the power supply main fuse. It will be on the power supply board next to where the power cable plugs into the board. It should be a T6.3amp fuse if my memory serves me correctly. You will have to take the back cover off the TV set to access the power supply board.

stop this work

Check the connection cables from its T'Con board to panel for any loose. Re-seat them.Visit the site named 'Electro-help' for more details. Click this link. View it in 'Flip card' option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 900 posts to different brand TVs now.

Try changing the input device to some other like a DVD player and if you notice same problem, it is better to have the TV checked by a qualified service technician, as back cover has to be opened for investigation.

Check all the connection sockets from T'Con board to LCD panel for any loose. Re-seat them. If this do not help you, T'Con board is faulty, and should be replaced.