Sony TV part

[iong]

Changed bridge. Pin configuration was different. Set now comes on with beautiful Pic. Now after a few minutes I get intermittent horizontal streaks in picture affects luminous not just one color. It will stop for a while then comes back. Look like it will be hard to locate Doesn't seem like any pots. I will run set for hours and see if it gets worse. If anyone is familiar with this Sony problem please help.
Thank you,
Perry