Hd tv sanyon

The trouble is, you are equating no apparent power to a dud power supply when an intelligent switch mode power supply monitors the current drawn by the circuits it supplies and will shut down if the limits are exceeded - this is an important protection against fire caused by an overload. No power might mean a faulty power supply or a fault somewhere, anywhere else.

You could keep replacing boards or you could allow a local repairer to make the repair - they have access to information and test equipment and have the expertise...

tried to disconnect all the output connectors from the power supply board, then make a voltage checking if output voltage is available. if no output dc voltages or drop you have bad power supply board.

If the screen goes rather bright green it is one of two things:

1. It is possible it is a shorted green gun in the picture tube, there are three of them, red, green and blue guns in neck of the tube.

2. The other possible reason is there is a problem on the small circuit board at the end of the picture tube, this model should use three IC chips, one for each red, green and blue.

Being intermittent makes it hard to tell but ask the shop if they tried the self check this set should have. With the set turned off use the original Sony remote and hit Display, 5, vol down, and power.

If the set has a self check (it should) a box will appear on the screen with up to five items with a zero to the right of each, items will be like AKB, OVP, etc, and if any have something other than a zero to the right it pinpoints what happened.

Sets with this feature record each event where something goes wrong, ANYTHING other than a 0 indicates what failure was detected.

If I was to make a guess there will be a number next to AKB, which is Anti-Kine Bias, this means the picture tube or something on the board at the end of it drew too much current and the set's shut down circuit turned the set off.

I actually fixed one of these where both the blue and red IC chips on that board were bad, needless to say, I replaced all three of them.

Any good shop would know about the self check and even if the set did not shut down in the shop the self check would point to the area where the problem is.

Let me know if you need more help or find a error code.


REGARDS, SD TECH

Hi


Thanks for using FixYa. From what you have described it seems the issue is with the power board or the main board and we’ll need to check few things. When you open the unit up; take a look at the power board-the board where the power cords/plugs goes into. You might see some filter capacitors a little bulged up in the top-If this is the case-this is your defective part(you can try to replace them-but some soldering equipment is needed). If not, then probably the main board has gone bad. This is the other board-where all the inputs are going into. All this is only recommended if you have electrical expertise and know how to solder/re-solder components. Please note that the TV components consists high voltages even when in off position. Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Basically, the TV is trying to power up the screen. If it fail to do so, the TV will automatically turn itself off to protect other part from being damaged inside. The problem is going to be the Backlight Inverter Board. It's the circuit board that supplies power to the screen. You can usually find a replacement board at a good price at Shopjimmy.com

If not under warranty, here's what you need to replace inside your TV. Power supply board BA71F0F01042.

The board is hard to find right now. Only three places I know of to find it.
Ebay,
Discount-Merchant.com,
and Shopjimmy.com
Right now, only Discount-Merchant has one in stock. Here's the link:
Discount-Merchant.com - Projection LCD / DLP TV Lamps - Plasma ...

I know it would be cheaper to fix the TV, than replace it.
If you end up throwing the old board in the trash, I would like to keep it if possible. Here's my e-mail, [email protected]

Most likely the power supply board.

Lie the tv down on a bed and unscrew the back. Its only about 9 screws around the edge and look at the power board, on the left, see if theres any burn marks.

I have a brand new board I bought the other day for the same issue but before I replaced it, stupidly, I checked with LG and turns out mine is still under warranty so I'm stuck with a new board.

Let me know if you want it. I'll match any price you can find online.

i also have this problem rca SUCKS i had a tech look at and the power board is shot same problem as you easy fix right NOT rca changed the boards to a upgrade now i have to search for one mine is 1 year old hope this helps my guy said adout 300. if he can get the board i called rca and talked to them i ask what happens to the tv in 1 year again cause its the same board no upgrade JUNK i let you know if i get one OH YEAH RCAS ****

Mine did the same thing- At first. The power supply (which is an easily removed module in the back of the TV) was overheating, and so I took it out of the TV and placed a muffin fan in front of it, which worked great for about a year. Now the power supply burned out completely, so I am out shopping for one online...

The issue with these TV's are the boards internally go bad, for Power the three capacitors get round at the top and either you replace the whole board from SVA fro 300.00 or buy three capacitors and replace them