After turning on the TV, it goes blue then to black with Sound. Ive read around this site and it appears to be a power supply issue. The part number in one post is DPS-210EP-2 C. Whereas the part number in another is POWER SUPPLY 90-264 VAC T. One costs $200 and the other $81 at these sites.
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Re: No picture BUT I HAVE SOUND
The cheaper power assembly will do exactly the same as the more expensive one, they are both Chinese made. The reason they are selling them more expensive is because they know the need for these service parts since there are not many places that carry them.
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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electro-medical.blogspot.com/ http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
I am finding a lot of people's lamps are going out. This maybe your problem too judging from what I have read above.
There are replacement lamps. They used to be pretty expensive but they are somewhat reasonable now. Below is a site you can order a new lamp this should fix the problem.
But before you order make sure that all the cables in the back of the television are in the right order. Red and White are audio while Yellow is video. A lot of people are unable to distinguish the yellow from the white.
If you have the other cables such as the blue and the black make sure the blue is with blue and black is with black. They are hard to see sometimes in a poorly lit area like behind a TV.
If everything is hooked up correctly.
Your next bet is the lamp replacement. Replacing the lamp its quite easy to do. Just remember to reset the TV lamp timer. Consulting your owners manual should help.
Here is the site for lamp replacements. You also can do your own search for lamp replacement.
It sounds like you have a power supply problem, this powers the inverter! Where you just replaced the inverter, we could assume it is good! Look for
some bad caps (capacitors) on the power supply board. They will look bulged on the
top an may be a little leaky (brownish stain). The power supply can fail on some output and be good on others. Was the back light inverter new? If all else fails, see if you can return the back light inverter and get another! I hope this is helpful!!