Picture problems on tv3

SOURCE: TV blank, sound okay, picture comes for half a second while switching channels

i am a technician and i too have this issue. if any of you can get a schematic and service notes, send them to trae3@live .com and i WILL find the problem and report to each of you. i cant get any help from sears all i need is to speak with a technician who actually works on these things, get the paperwork and then i am sure it is a matter of a module swap. any info will help us!

SOURCE: frozen picture on LG LCD 37"

Try One of your working TVS and connect it to your cable outlet of the TV that is having problems. If that TV Does not work then there may be a degraded fitting or the Leg coming of the splitter to that outlet could have a Low Signal Problem
Next Take the First TV that was not working properly and put it on the cable outlet of one of the TVs that is working properly and if the TV set works on that Channel then you know it is not your TV that it must be the cable

SOURCE: how hard it is to replace by yourself main board Samsung LN-T4065

You need to do some more diagnosing of the problem. If you get sound and change channels take a bright flashlight and place it again the screen. Look for an image around the edge of the flashlight.
If you see an image that means the LCD controller board (TCON) is probably good.

The problem is probably one of three causes;
1) Inverter board is bad
2) CCFT (cold cathode fluorescent light) are bad.
3) Power to the inverter board is bad. You can also check the connectors.

SOURCE: Black screen on digital channel on my vizio

I had the same problem. Check out my solution by viewing the subject titled Vizio 37L suddenly stopped getting all digital... Hope it helps!

SOURCE: Sony PFM 42V1, when connected with DVI, picture

it may cause by resolution mismatching, read the manual to find correct resolution needed. I have a service manual, if you want I can send it.