I have read your issue and hope I can help you solve it.
If the bar is all you see (short white picture 1-2" tall across the middle) then all you may need to do is solder the connections on the vertical IC.
You would need soldering skills to even try to fix it,I am not suggesting attempt to learn soldering on this set. If you want to confirm this is the problem, open the set and look at the IC bottom pins with a magnifier , the vertical IC is standing straight up near the yellow and green wires running from the yoke (copper coil on the picture tube neck).
There is not alot you can do other than this repair attempt , calling a repairman would cost over $150 usually unless you c