No picture or sound. Power board led flashing in sequence of 12. Says D12V on legend.

1. buy the service manual yet?
2. get a real shop TV to fix it?
3. what to look for in this complex mess really? well lots.
4. all DC supply rails not just 2.
5. Screen dead make sure LED back lamps have DC power.
6. does flash light pointed to screen show data/??????
7. no sound but gee lacking a screen how would you find a sound source input. hard no? yes. a mp3 file on USB"
8. its not just dead clicker battery is it?
9. this tv uses 167watts of power old is it? 2010 made. 12 years old it is. but is LED back lamp'ed I think.
10. connect DVD deck player via HDMI and put in DVD and push play on deck and hear sound now?????????? hummmmm
11. below RIGHT BOTTOM TV SIDE TURN OFF POWER SAVINGS?
12. THERE IS 2 POWER ON BUTTONS 1 TV , 1 REMOTE BOTH FAIL>? AND SAVER BUTTON TRY BOTH MODES? YET.
13. turn up volume and try playing DVD? fo sound works Backlamps are dead?
14. The TV will indicate any problems with the STANDBY indicator flashing in reD and is a code. does it.
15. the LED driver board bad or power to it is dead. (LED back lamps)
16. and vastly more , any board that kills power DC or data then the screen goes dead.

I can't find a manual for either of these sets so I'm not able to be specific with parts but a set with no sound or picture is generally caused by either a bad main board or power supply. You can find out what board is bad by checking the PSON..stands for power switch on , the voltage should change when you push the on button and stay that way but going by the fact you get a blue light I'm guessing that is working and you have a bad power supply, another test would be with the set on and the light blue test the various power supply voltages and see if any are missing or incorrect, the values should be on the legends next to the connectors, they will say for example pin 1 ground pin 2...12 volts...pin 3... ground...pin 4.5 6...5 volts ect....Good luck!!

You have at least one bad LED strip, it is drawing to much current and shutting down the power supply for the lamps, you can fix this yourself but its not real easy getting the panel out and back.

Check and replace the damaged component/s at its main board. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

I'll just hazzard a guess here as you sound to be technical.
I speak from general experience fixing power boards and not from experience with this particular one.

Trace back the 12V chassis and you're likely going to reach a 7815 or 7812 stabilizer of voltage that you should replace and that will likely take care of the problem.

Also look for the filter caps around it - before and after - as they can both cause the problem if vented.

If 12V is used for the audio it is also possible that the audio amplifier may have bad caps in it or a dying amplififer IC. But that is less likely.

Finally, you can always send the board to us for diagnostic although this is kind of a bad problem to have since it requires waiting 10 or so minutes to show up...those are always turning up losing money for us than making money...
Still,
http://www.coppelltvrepair.com/newservice

Hope this helps!

Sharp LED/LCD EEP cleared Step 1 Remove Mains Plug 2 Press On/Off Switch from LED/LCD Panel 3 Press Ch Down & Input Switch together and plug in mains cord 4 LED/LCD will start 5 "K" will appier on Screen 6 Press Ch Down & Vol Down from LED/LED Panel 7 1/9 Page will appier on Screen 8 Go to 9/10 page by pressing Up & Down arrow of remote 9 Select EEP Cleared 10 Press ok button from remote 11 On Screen dispay EEP running 12 Remove Mains Plug after complete EEP Run 13 Restart LED/LCD

Yes,if "LAMP" LED light indication front bazel panel,flashes or stay on.The projection lamp life is over.Require changing a new projection lamp.But if u also hearing clickings sound too?The board call Ballast board also dead.This Ballast board help to ignite the projection lamp.If a power supply board problems,only power light LED indication will flashes.

So the 12V power supply is either not there (faulty power board) or is shorted by whichever board it is passed to.

I do not know this particual Sanyo, but I know what I'd do - I'd open and see at the power board which of the output cables carries 12V; they are most commonly labelled on the power board, right next to the output pins.

12V is usually power going to the audio amplifier and sometimes to tcon (LCD controller) of even the main board , but it won't go to to the ysustain - the other apparently large board when you open the TV.

Of all listed I'd say only the audio amplifier is likely to short...all others are possible, but highly unlikely.

BTW what do you mean "but turns off, when back is removed"?

The power supply is failing, or there is another circuit area that is pulling too much current, and the supply is going in to protect mode.

This would require proper troubleshooting by an experienced tech. If the problem is very involved, or the tech is not familiar with the set, he will require the service manuals and service information.


Jerry G.

I dont think Sony has a "12" blink code, the highest (being in a newer set) is a "10", might try rechecking that, as for the code 2 that is an OCP, usually a shorted horizontal output transistor/Convergence IC's/High Voltage distribution block. My bet is the Block as HV tends to break down parts like that over time You must be careful when removing the anode leads as you can break the tip off or burn something up if not done right.