In the last week the tv picture has been flashing / fading and keeps losing the picture and comes back automatically .

Where did you get your used boards from Jerrard?

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main digital board.

Hello Patricia,

• There is a loose soldering connection in the Main Board. That happens because the components on the are generating a lot of heat therefore melting solder connections.
• Stop beating on the TV's back, that only makes the problem worse.

• Take it to a shop.Or if you are a tech, try locating the loose connection(s) and solder it back.
• Also check your Warranty Period, It may cost you 0$. Call Vizio if you still have Warranty on the TV.
  

Here is a link to Vzio Supoport.
Good Luck,
JP
VIZIO Product Support and Services VIZIO

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Green light flashes 5 and then red light flashes 6

Re seat the audio and HDMI board on your 804 and it will correct the issue. from the back its the HDMI is the TOP board on you left an the Processor is the vertical bord on the left running along the side of the receiver it connects to the main board, amp board, and HDMI board as well as the main panel via a wide ribbon cable. take the boars out and reseat it back in place. if you put a fan in side the unit it will help alot. these connector when they start going they get worse with heat keeit the unit cool. good luck

Stacy,

Sounds to me like there is bad solder somewhere on the filament supply circuit. Do you know what a cold solder joint looks like? It is a solder joint that is not making a good mechanical or electrical connection. When you lose that connection the filament inside the tube slowly stops heating the electron guns and the picture will fade away. When the connection comes back the video will come back.

Might be worth it to take the back off and check out the little board that is connected to the end of the tube. The problem is either there or on the power supply.

Shouldn't be a problem for a repair tech. I would not spend very much money though.

Open the back of the TV,and look at the can shaped items on the board that the power cord is hooked to.If any of them have the tops,or bottoms bulged out,they need to be replaced.This should get it working again.So far I have fixed four of the same make,and model TV as this,and they all had either one,or two bad capacitors.I hope this helps.If you have any other questions,please let me know.Thank You very much!

Tyler

Is the sound ok. Yust the Picture. If both dissapear replace power supply board. That is the main big board with the most heatsinks on it. Main power gos from a switch board to main power supply.

on the signal board replace the caps by the 5/9 volt regulators. c2p04 is the main culprit. 6 caps in total can be changed. I believe c2p05 also.