Howdy, I'm wondering if it's possible to reboot a Mt3500a emissions analyzer. I got a good deal on one but it would not maintain the time and date, so after removing the cover I noticed a 3.6 volt rechargable battery. It tested at 0.6 volts so I replaced it, and now the screen is blank except for the blinking cursor. Can I reboot or reinstall the program or is this vintage beauty now a boat anchor?