Was working. changed battery now dead.

SOURCE: Razr v3 dead battery

you have a dead battery, this happens often. all you can do is just buy one, ebay

SOURCE: Motorola RAZR V3

the mainboard is gone and have to either be replaced or taken to a mobile service center close to you and hvae them use special equipment to revive it.

SOURCE: NTO ABLE TO CHARGE BATTERY

Try charging the battery for a long time.

SOURCE: Dead phone but keypad flashes

replace the LCD + flexcable on the phone.

SOURCE: Battery will not fully or will not charge

Whenever you first purchase a device you must charge the phone fully otherwise if you charge it partially an then use it it will never charge good. You may need new battery see if youe warranty covers it \. If you are within 30 days of purchase you can exchange it at no cost!