I have a globetrotter unit and it been starting to act up. first thing is the displays at random times start to display all 7's or 2's. this might happen for a few second to hours on end and at other times not at all for days. I have replaced every single wire end but it still comes back randomly.

Second is the sound randomly starts to so go all wield and off pitch at times. When it starts the only way to get it back to normal is a power on and off. Even at time during power on it will sound all off tune.

Any ideas?

Got the new NVRAM 5101 installed and did not solve the issue. Display units after a few minutes start flickering all 7's and the sound is just as wacky. Sound tone changes if i wiggle wires in the harness located in the back box.

thinking of trying all new caps on the sound board as the next step to rectify the sound issue. Still not sure what can cause all the 7's

If I wiggle any harness in the back box it does it.

I did pull all wires and checked ends one at a time and installed a few new ends that were questionable. The displays even when plugged in one at a time still do the random 7 thing.