Hello all...

Model number RAC128WA03, marked as being made by North American Philips in
Knoxville, TN. Says "Sylvania" on the front panel.

This is a set I keep on my porch...and when the weather is bad, the set
comes indoors because the porch is enclosed but unheated and uncooled. It is
a nice little table set in good condition and it has been kept pretty clean
over the years.

Problems:

The picture occasionally becomes sort of a soft but pronounced cyan (blue)
in color. The shift isn't so bad that all other colors are forced away, but
some colors simply do not appear. When the color control is turned
completely off and a black and white picture is displayed, the syptom still
appears in a way that seems to shift color temperature. This is something
the set only started doing recently and a hard whack on the side may or may
not fix it. At the very least it will produce an attempt at switching to the
proper colors. I reckon this is bad solder or marginal parts more than
anything else. Is there anything specific I should be looking for?

The next problem seems perhaps a bit more serious and certainly affects
viewability more than the first problem. Periodically the set acts like the
screen (G2) control on the flyback is being slowly turned up just until
white lines appear softly on the screen. Along with this effect, the picture
on the screen will get brigher and brighter. After a second or so of
displaying the bright picture with faint white lines, the set reverts to a
normal picture and the process happens again. I'd say it is repeated about
every 5 seconds. This problem never goes away as long as the set is powered
up, but it won't start until the set has been running for --say-- 30
seconds.

I have had very good performance from this set, and I like the way it looks
and works, so I'd like to repair or get an idea of what is wrong if at all
possible. Thanks in advance to anyone who can give any ideas or thoughts!

William