Charon wrote:
I have an older crt projection big screen and I now have retrace lines
that appeared after turnning the set on a few times and hearing a arc
immediatly when turnning on. I waited too long to fix the arc and it
has affected something else.

The arcing was comming from the Red CRT from under the node and arcing
to the chassis, I have since fixed this but have been unable to track
down what is causing the retrace lines. The B+ voltage appears correct
but I do not have an oscilloscope to test ripple in any of the parts.
Any one know what the arcing may have effected ? The blanking circut or
perhaps from the flyback backwards ?

It's usually a driver or output filter circuit resistor/capacitor open
or change in value,
guess you will have to test by substitution. Could also be crt did you
try swapping the
crt drive boards? If the lines go away its in the drive circuit if
they stay then it probably the
red crt.