Hi Guys,
Hoping for some help. I picked up a EBD LTD for a friend last week. It will be his first pin and I wanted to look over it a little. Everything works and plays fine. The MPU goes through the 7 flashes and the sound 5. This still has a rechargeable battery on the board, I’m pretty sure its not original. When I first looked at it the sound was set to the default chimes I think it wasn’t played enough and the battery drained. I went into the self test and set it to 03 so it sounds normal again. Now I can’t get back into the book keeping or adjustments. I can do the self tests and when I push the button again there is nothing. Even trying to push it 23+ times there is still nothing just the GI and the only way to get out of it is to turn it off and back on. Its still retaining the sound setting and high score. Could it be the ram chip is going bad? I was going to suggest to him putting a 3 aa battery pack off board but if it could be the chip maybe go with a nvram from Pintech, simple swap of the chip.

I do think thats the best route to not have to worry with the batteries and more but do you think that will fix the issues I'm having now?

I did install the NVRAM and the problem is gone, I can get into all of the adjustments fine now. I thought I would post in case anyone else is having similar issues.