Issue With a Rhodes Chroma Synthesizer

Good Evening…First Post
I have a Rhodes Chroma sythesizer and have a problem.
The 12 and 5 volt plus/minues voltages were a little high, and were adjusted to spec.
When the keyboard is turned on, about half of the LED status lights turn on, and that is it. No response to any buttons. Most of the time, when it is turned on, the same amount of LED light up.
No response and No sound.
One thing noticed is that after 5 minutes of turning on, the processor gets pretty hot. The amount of heat is pretty high, and I don’t leave it on more than 10 minutes.
Any advice or insight woud be appreciated.