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Make sure the Wii's analog composite video output is enabled. Try resetting the Wii to factory defaults. this will default to enable the composite video output. You can find the procedure in the Wii manual.
I believe they are the voltage supplies for the TWO convergence IC's that this set uses(either STK-392-110 OR STK 392-150---THEY are interchangeable--but the 150 is a better device)
The easiest way to prove if this is your problem is to locate the two chips (black--2 1/2 inch wide X 1 1/2 inch tall with the STK number printed on them IN WHITE)
If someone unsolders all 18 pins on each chip--see if the set will turn on with them out of the circuit (you do not have to remove them--just unsolder both---If the set comes on the convergence will be very bad but you will know one of the chips is bad.
Also if you look at all the resistors around them (most will have location number RK46 etc) see if any of them are discolored or burnt. You find a burnt resistor and it is a sure bet onE of the chips is bad.
BOTH CHIPS NEED TO BE REPLACED!
A pretty easy repair if you have good soldering skills and I can tell you what you will need to do the repair. If replacement of the chips fixes the set it just needs to be adjusted with the Hitachi remote and should not have this problem again for 5-8 years.
IF YOU HAVE QUESTIONS, do not hesitate to ask me---I am here to help people.
depends if you have a cable service. Cable companies will still broadcast in analog because they are a closed system same with sat. only other way to tell if you have a digital tuner is by one a cable/satalite card or when doing the tv programing it asks digital?
There are a few things to consider here. First, if you are using cable or satelite, the changeover has no effect on you anyway. If you are using an antenna, the changeover to a digital broadcast signal has already been in place for a while. The set should be able to auto-detect these signals. I believe that most of the models from 2005 on had digital signal tuners available. This is not the same as a "digital" tuner. A digital tuner only means that the stations are tuned digitally but are still analog signals. The changeover will be to change the analog signals to digital ones that require a smaller frequesny band for broadcast thus opening up more space for additional channels.
First thing to check, would be that there is no oily liquid or residue around or on the printed circuit boards underneath where the picture tubes are. If there is, one or more of the tubes are leaking out the coolant and the seals will need to be repaired as well as the board, if it is not beyond repair. If that does not work, check out the power supply voltage . Check to see if the horizontal output transistor is shorted, or that the convergence Ic's are not causing the set not to start up. Good Luck