How do i fix the "flickering" on my vizio tv?
In my Vizio VW42L I had a flikering problem as described above. After several shut down, restarts, disconnecting all cables and checking with different cables, it was clear the issue was with the TV itself. The image "flickered" like a strobe light. The image was clear when it was on, audio was unaffected.
After much research, it was clear the backlight inverter was the culprit. Instead of going ahead and replacing the entire boards (there are two - Master/Slave), I chose to replace the 4 capacitors (2 each board) and see if that did the trick. If it didn't work, I was no worse for the wear as the capacitors only cose $1.50 each at radio shack.
I am glad I went that route as it now works perfectly again.
Simply unplug power supply and all cables.
Remove the stand and/or mounting bracket from the back of the TV.
Remove all screws (several along the perimeter of the case and a few near the bottom just above the cable connections.
Carefully separate the back cover from the TV
You will see a pair of matching circuit boards on either side of back of the TV.
Remove the covers from each (4 screws each).
Disconnect all cables and remove the circuit boards.
Note the Voltage and the Micro Farans on the capacitors. They look like little cylinders. They should read something like 35v 470uF. You may have to turn the circuit boards over to see this.
Cut away any glue holding the capacitors in place then use a soldering gun to melt the connectors and separate from the circuit board. Be sure not to let any of the solder flow into any other area on the circuit board.
Once you have all 4 separated from the circuit boards, mount 4 new ones. You should be able to use the same solder from the previous connections. If not be sure to use only a touch of new solder ensuring it doesn't flow beyond the connection point.
Put everything back together and shazam! Works like new. If not, you are only out about $6 for your efforts. This was a surprisingly easy fix.
In my Vizio VW42L I had a flikering problem as described above. After several shut down, restarts, disconnecting all cables and checking with different cables, it was clear the issue was with the TV itself. The image "flickered" like a strobe light. The image was clear when it was on, audio was unaffected.
After much research, it was clear the backlight inverter was the culprit. Instead of going ahead and replacing the entire boards (there are two - Master/Slave), I chose to replace the 4 capacitors (2 each board) and see if that did the trick. If it didn't work, I was no worse for the wear as the capacitors only cose $1.50 each at radio shack.
I am glad I went that route as it now works perfectly again.
Simply unplug power supply and all cables.
Remove the stand and/or mounting bracket from the back of the TV.
Remove all screws (several along the perimeter of the case and a few near the bottom just above the cable connections.
Carefully separate the back cover from the TV
You will see a pair of matching circuit boards on either side of back of the TV.
Remove the covers from each (4 screws each).
Disconnect all cables and remove the circuit boards.
Note the Voltage and the Micro Farans on the capacitors. They look like little cylinders. They should read something like 35v 470uF. You may have to turn the circuit boards over to see this.
Cut away any glue holding the capacitors in place then use a soldering gun to melt the connectors and separate from the circuit board. Be sure not to let any of the solder flow into any other area on the circuit board.
Once you have all 4 separated from the circuit boards, mount 4 new ones. You should be able to use the same solder from the previous connections. If not be sure to use only a touch of new solder ensuring it doesn't flow beyond the connection point.
Put everything back together and shazam! Works like new. If not, you are only out about $6 for your efforts. This was a surprisingly easy fix.
Thanks for the information. I followed your instructions and found the four capacitors. Three were puffed up and 2 showed signs of leaking on the tops. I ordered new ones & hopefully this will fix it!! Mine were 35 volt 680 uf
mine flickers but i still have sound and pic if you tap on top center of tv frame lol just a soft tap it goes away. Does anyone else still have everything just an added flicker?
Has anyone else ran into the problem where the tv still works pic and sound but has the flicker added?
×
Does the VIDEO FLICKER and the screen stay lit? Then it's the Video board, but if it Blacks out it's the Inverter if it's an LCD and the Ysus if it's a Plasma...
You still have to send it to Vizio to get it fixed
SOURCE: I have a vizio 37inch
This is a common fault solution which can be checked and corrected by you assuming that there is no component failure. There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance. The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points. Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault. Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing. Check for tips to look into the SMPS unit with some of my tips: http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies Thank you for using Fixya.
1,554 views
Usually answered in minutes!
×