I have an older 86 model Mazak 10N lathe (T-2 controller) that was working fine and now I have #23 NMI battery alarm that will not reset. I have looked at the forums and have changed all the batteries on 3 boards from the ni-cd to the ni-mh with lead wires. Many posts said this is an improvement.? They all check 3.78v. for the required 3.6v. I had never lost the parameters. After trying everything that I could read about or think of I did a back up and re-initialized the control. Difficult for me as newbie but I got it with other alarms of paridy, etc but shut it down and restarted all went away except my original #23 battery alarm. I am running a 30hp rotary phase converter made for cnc. Very good 240voltage. I have tried at someone's suggestion shifting phases in case high leg was the problem. No improvement. Has anyone had what charges the batteries on the board go out? Any help here would be much appreciated.