My Wasp, Jasper

Hello, Im just looking for advice about the Jasper Wasp I got a couple months ago. I bought it knowing it had a problem, I have little knowledge about synth circuitry, forgive me if I am clueless. It only produces 3 or 4 different semi tones across the keypad. It can be varied by the tune adjustment and the pitch controls, so it seems to be able to produce the notes, it is the same with a midi controller attached. It didn’t have a case so it’s inards have been exposed and if I understand the seller correctly, it has gotten worse over time. Any thoughts or insight would be appreciated!