my Sony KV-M2151D color television has the annoying problem at the
moment
that it looses its colors after it has been turned on for some time. a
while
the color starts flashing and its a half half situation but within some
minutes after that starts it turns totally black and white. it stays
like
that until it gets turned of for some time, but then again it happens
after some time.

im not that much of an electronics wizard myself so i have a few follow up
questions.

This set uses the Sony BE2A chassis, and this fault is usually caused by
trimmer CT332 going faulty. You can clean it or replace it with a 15pF
capacitor.

is from trimmer CT332 the CT332 part the code on the board in the television
or is that a general type or such? as for the cleaning part, how can i clean
such a thing, is there more then i can do then blow a few times at it?

Failing that, check the IF section for dry joints.

i take it you mean if have to check something for components that might be
loose, but what is the IF section?

thanks,
bart