Yeah, someone with experience with this device can certainly be helpful.
The problem is mainly that this piece of equipment is based on 1980s era electronics design and components from that same era, which makes for the nasty combination of relatively complex electronics (often using hybrid analog-digital solutions for things such as pwm control, using analog oscillator circuitry which is sensitive to component degradation) and capacitors that just have a finite lifespan. Getting this to work may require a schematic, soldering iron and a healthy dose of patience & perseverance.