I have MTG 2500 scanner which I use mostly for my Wrangler 4.0 1995.
It worked fine until tonight - when I hook it up to DLC it powers up, all pixels on LCD lit up and then it shuts down after 4-5 secs. If I reconnect to DLC immediately same thing happens but now it shuts down in 2 secs.
Battery is bad but as far as I know battery is not used once scanner is connected to DLC. If I unplug battery I get the same symptoms.
I have multiple primary cartridges, so I don't think this is issue with cartridge since every one used to work fine before.
