Hi, TV RCA CHASSIS 177 MODEL F25631SE NO VERTICAL NO SOUND. I already replaced U4501 and C4504 and still H-line. Any idea? Schematic? Pat Help make your TechAssist online repair tips database better! Submit your fixes here: http://www.circuitwork.com/techassist/tip/#tips To unsubscribe write to: techassist-request@xxxxxxxxxxxxx with unsubscribe in the subject line.