veritas 8 keypad no power?

we have a Veritas 8 alarm, this morning it went off, I went to reset it but nothing worked, the light on the key pad is not on and the buttons make no sounds when pressed, I went to the control panel and the LED is flashing, do I need a new battery? It eventually stopped going off and the light has stopped flashing but the key pad is no longer working, although the back light to it is still on any ideas?