Motorola Nextel i355 Flashing Blue Screen and the word "Do," Help?

I put a fully charged battery from another phone into it, turn it on, it says low battery, I put it on the charger, and it starts flashing between the word "Do." and a blue screen.. That's pretty much it, and I don't know how to make it stop
Would love to toss it, but it's for work, so I don't have a choice..
Ughh too late.. It's already destroyed, but I'm almost positive it's got a short, so no matter what I do, it's gone.
But on the bright side, I called my boss, and he told me to put the SIM card into another phone, so everything's good now :)
Also, the battery I had put in it was from a different phone of the exact same model. We've got like 30 of these little f***ers roaming around here.