On Sat, 06 Jan 2007 11:53:31 -0500, G.M. Durrence
wrote:

I have a sony kv32xbr55, around 13 years old that still has a good
picture when working. It suddenly developed a problem that occurs
when first turned on. The left 1/4 of the screen is green from top to
bottom. It is a band that has strait edges on the left and right. It
usually clears up after about 30 minutes. Before clearing up, the
green band starts breaking up with horizontal lines all across the
screen. After clearing up it works OK for hours, until turned off.

Can anyone offer a clue about what might be causing this? I got an
estimate of $250 to repair but I would rather put that on a new
flat-panel LCD. I am an experienced electronics technician and handy
with an oscilloscope but I am hoping someone might have experienced
this problem and save me a lot of time.

Thanks for any help.
G.M. Durrence
(to reply remove -nospam from address)

If it gradually fades back to normal from left to right, then the most
likely cause is a bad capacitor near the flyback. It will probably be
a high voltage one (160v-300v). When electrolytics start to fail,
they get better as they warm up.
Andy Cuffe