What would cause a GE 60GW948 have a very snowy, and now No picture screen

It will be best for you to visit the site linked here. It has screen-shots to defective LCD screens, and details about the faults. You can compare them to that of your TVs' and can determine the cause of the fault. If you wish to get more details, check this. http://electronicshelponline.blogspot.com/
Pull up previous posts by its left sidebar, or type in the brand name and model number to of your set, to its search box, and press 'Enter' or view it in Mosaic / Timeslide option.

Possible screen controls in the set are up too high---if you turn picture and brightness to zero does the screen get full black?

screens set too high would give diagonal faint trace lines in the picture.

These sets also should get a annual cleaning of the lens and sometimes the mirror inside= if this is the case the picture will usually look darker and dull ----this will not affect lines in picture.


the lens are easy to clean but other actions depend on what your response is to the above information.

Diagonal lines are usually called "retrace" lines and are caused by a issue on the CRT board or the master screen being set too high.

Many different mitsubishi's have problems with voltage regulators going out and causing wavy diagonal lines that scroll the picture from top to bottom or vice versa. Without a model number it's difficult to clarify.

The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony,Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2
Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix here http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Hi There,
Sounds like your Horizontal Output Circuit is leaking current causing diagonal lines across the screen. I hope this will help and thank you for using FixYa!

chech for a shorted horizontal output transistor

You may have a bad flyback transformer (high voltage trans former). The lines you're seeing are retrace lines caused by the picture tube screen set too high. This is often caused by the screen control opening up. This control is part of the flyback.
Stargazer

Hi.

Just read your list of problems The first fault (Diagonal lines & picture collapse from left & right) Sounded like either A poor connection or dry solder joint either on scan coils or scan coil plug / socket on main pcb.
If this were the case the engineer that called out should have spotted this & sorted it very easily. But you say it is still the same so what did he do ?
Did he give you a reciept with break down of what he did ? If yes please post it here for me to go over.

The sound problem you describe has thrown me a little so could you please post your tv model number on this page so I can see if this is a stock fault.

The static shocks you are getting is relatively normal & not a problem unless you are getting them off of speaker grilles or even tv casing if it is silver in colour.
I am UK based & have access to samsung technical but I will need your tv model number.

http://dysonmanuals.inc.io/

Chris.