Question about Toshiba 50HP66 50 in. Plasma Television
My new sony flatscreen tv has a 2 inch wide blue line going down the center of the screen..what is causing this?
SOURCE: 42 inch magnavox #42mf230a/37
One of the driver IC'S has gone bad. Need to replace just the driver IC or the board that the IC is on and that should solve your problem. If that doesn't do it, then the BAD NEWS IS THAT THE PANEL IS BAD. Replacement is you only option then. Good luck. GURU JAY.
Posted on Mar 16, 2008
SOURCE: 40 inch lcd blue line vertical
Have just purchased Samsung LA32R81BD have thin blue vertical line a third into the left hand side of the screen. A pity no support on a sunday or public holiday! Tried the squeeze theory without joy. Will attempt swap and see what excuses the dealer has? Thanx for advice fixya!
Posted on May 03, 2008
SOURCE: black line
Called ghost lines or banding. I researched on toshiba thread LCD screen bad. I have same problem purchased HL196 4/07 problem appeared 1 year and 9 months ago no extended warranty. If still under warranty call toshiba. LCD screen more expensive then orginal price of TV. Should file class action lawsuit for selling defective screens. Lot of people having same problem. goforth2953
Posted on Mar 13, 2009
The red line driver at that point isn't working or there is a bad connection to the panel for that line. (I assume the intensity and hue of the cyan line varies witht the picture). What type of screen is it? Plasma or LCD? The following is for LCDs and may not apply to plasma panels. (I haven't had to fix those yet.)
Once in a while you can solve the problem on an LCD by gently massaging the connector to the display panel edge at the bad spot, although there is a risk of causing other lines to drop out. I once fixed an LCD that had a hair caught between the elastomeric connector and the display glass, but if that were the culprit in your case, you'd probably be missing more than one line. It could also be a problem with the driver chip for that line.
Be very careful about tearing into the LCD. The connections are very delicate, the fluorescent backlight tubes are glass and have mercury inside, and the potential for electrostatic discharge damage is always a concern. It's easy to cause more problems than you fix when you get into the connections, although those can usually be reversed with patience and steady hands. The worst case is a misalignment that would mess up your color registration (color drive going to the wrong line). Most panels have a sticker inside warning against removing the driver electronics. It's there for a good reason.
If I've scared you off, or if the connector massage doesn't work, there are companies like Moniserv that specialize in repairing LCDs. They have the equipment and dust-free facilities needed to repair bad panel drivers.
Posted on Mar 23, 2009
There's a 'data control' and/or 'address' problem that's developed. Pixels depend on voltage, control, and data coming too their designated address.
A digital circuit feature called a 'DATA_ADDRESS_ BUS" are responsible for 3 criteria: Delivering voltage, control, and data to each pixel in less than a second.
1) If voltage fails the pixels don't light up. They appear black in color (their 'off 'state)....numerous pixels that don't light up look like a black line. But their actually individual pixels with no voltage.
2) If control fails then all pixels are white in color (their 'on' state). Without control the pixels can't adjust properly to high or low 'state', meaning brightness and dimness. This looks like a white line vertically on the screen.
3) If data fails then the pixels can't adjust to the proper color at the proper time.
This appears as a line that changes color out of sync with the entire picture.
Have a technician look at the pixel address registry circuits. As well as control and linear circuits....the problem is somewhere in there!
Posted on Jun 13, 2009
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