Blue line across panasonic large screen hdtv

Sound like your Y-Sustain board has one foot in the grave. The Y upper buffer and Y lower buffer boards go when the Y Sus Goes too...

The Blue CRT ( Picture Tube ) has a short. You may be able to do a temp fix by turning down the Blue CRT drive level ( Located behind the front speaker grille )untill the lines disappear. But its only a temp fix. The Blue CRT will most likely need replacement.

HI:
Your problem is the blue CRT or picture has gone bad, you will need to have the picture replaced, there are three tubes in this model rear projection television. Red, Green, and Blue. Replaceing the blue tube is the only option for normal operation to resume. It may be hard to find the tube, but you can try contacting this website for the part www.vdc.com, they manufacture and usually have stocks of sony picture tubes and rebuilt ones as well. The company's name is Video Display Corporation...

Problem #1) Convergence

Symptoms:

• Screen Looks 3D
• Colors wont align
• Video may look distorted

Problem #2 CRT Fluid has clouded over. Symtoms

• Dull looking video
• White looking video
• Halos around objects
• Red/Orange looking video

You can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

hello sound like convergance chips also check resistors and capacitors hope you get it fixed

shaun

Had this problem bout 2,3 years ago...it was fixed in about 5 minutes with the help of this article

Tonight I have to do this fix again..the blue lines came back about a week.
http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html
I strongly urge you to save the web page locally on your hard drive or print it out and place with the tv manual....

Good Luck..

if the blue lines runs across the screen in the center its a vertical deflection problem it will need to be diagnosed.

This is most likely a convergence problemand can easily be fixed. If you can solder you can repair this yourself. First try resoldering the pins on the convergence ICs. If that failes to resolve the problem, replace the ICs. THese are large black Ics attached to a heatsink and may be marked STKxxx.

Keep us posted.
Dan

Is the blue line running straight across the middle of your screen? If so its a vertical deflection problem. Possible bad Vertical output IC

blown fues on the G board, that should fix my problem
and or might need to replace stk392 convergance amp ic's
· http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
· http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html