I agree. Look at the solid state TS series. I bought a TS130 for a hundred in Phoenix. It was in like new condx. You will need a power supply, but that can be had for reasonable, too. Although those deals don't show up every day, they do happen. Watch your Craigslist at least two or three times a day. The good deals go fast.

As far as the Ranger goes, COR is right. Whenever I have a unit in unknown condx or has multiple issues, going through the alignment will usuall reveal the problem areas. Always begin at the PS. Since you have a Service Monitor available, with a service manual you should be good to go.