Avisual check showed cap leakage stain on the main center chassis behind the vert IC. I changed caps C133k, 220mfd@35v , C164: 100@25V. In the vert section, leaking C53K: 470@25V and C502K: 220@35V. Washed the area. No vertical at all. Just a line, has audio. Replaced the LA7831. LA7831 has volts on pin 5,8, so it has good Vcc source. Checked a 3.9 meg R4512, ok I get a good sawtooth at input to Q4501 "vert sawtooth" transistor's base. Nothing out the emitter. Can't see how it's stopping it. Transistor seems OK. Traces seem OK. I don't have anything on file for this oldie. phil Bader -- Philip Bader Jan Phyl TV Inc. (estab. 1976) 3420 Recker Hwy. Winter Haven, Fl. 33880 Fax (863) 299-8821 email: tjanphyl@xxxxxxxxxxxxxxx ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/