Thanks Dave. I have downloaded every manual I can find, and the Tek troubleshooting your oscilloscope guide as well. Spent the better part of yesterday going over it. I can get a trigger light on ch1 by adjusting the sensitivity of R7246, although it doesn¡¯t stabilize the wave and it stays triggered with the probe detached. Also the trigger ADJ R7224 doesn¡¯t help anything.
I¡¯m very hesitant to reseat U375 or any of the socketed transistors because I understand replacements are difficult to get. In other manuals I¡¯ve seen flowcharts of what to check with yes/no logic to narrow things down. I haven¡¯t come across any like that yet. I¡¯ll check out the Wiki today. Thanks again for any help or suggestions!
