I could use a schematic of the circuits involved in the turn on process and maybe the power supply circuits because I don't know if all the sources are there and the H drive circuits. This one has raw B+ and at least some of the B+ out of the power supply also B+ on the HOT. No start pulse shows up on the base of the HOT when I push the button. Or if there is a common fix for this problem. Russ Hoyt Hoyt's TV Exeter, NH ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/