iRobot starts automatically when battery is inserted: power button doesn't work. Take battery out, the iRobot powers down.

[Erin Gee]

Hi everyone - 

I have taken apart 10 robots to mod so they can be plugged into the wall.  This is all fine and good, however it seems like I must have mashed a few wires together incorrectly when putting the robots back together - now when I insert a battery into 3 of them, the roomba starts up immediately, and there seems to be no way to turn the power off unless the battery is taken out.

Otherwise the robots works fine, but this is obviously super annoying.

Does anyone have access to a schematic or something like this so I can see what possibly might be the problem?  Nothing seems obviously wrong when I stare at well-functioning machines and the 3 broken ones I have.

I've tested to see if it is in fact the button console that is the problem - no such luck.

Thanks!

Erin