Need schematics and info

[DefCon4]

I just "inherited" a 9' Laux Beta9 steel panel dish with Houston Trackers 8+ and 10. The Trackers don't power up, but my searches point to power supply problems. I am repair-capable and can reverse-engineer circuits, but any info and schematics will help save time and effort.

While I've received valuable info from this site in the past, I have not needed to register until now. I hope some of your old timers have the info I need.

Thank you,
DefCon4