Many moons ago I got into CB radio use which were illegal at the time but after having my collar felt, the rig confiscated and getting a stern interrogation/talking to by HM Customs and Exise I moved onto other hobby's.
So without boring you too much, I'll get down to the subject in hand - an old President Jhon Q AM/FM CB that's seen better days and has obviously been tampered with inside before getting consigned to a loft for who-knows how long. It came to me without the mic, aerial, power lead, brackets, clips etc but that didn't stop me seeing if it would light up.

In short, it kept blowing fuses but after reading lots of posts on here I ended up replacing a diode and also realised the power connector has previously been fitted upside down (therefore invalidating the +ve and -ve legends stamped into the chassis


With power connected and it switched on, the PWR/SWR meter lights up, the channel display works, the TX led is constantly on and there's a faint white noise to be heard through the internal speaker (dependant on control settings).
So, that's the history. Do you think, given the above, the probability of repairing the rig is good? Inside, it's obviously been previously worked on and there's a free-floating board that I presume has been added to increase functionality. The switches on the front have too much free-play and hinder the extreme switching positions as well as messy solder joints here and there.