I turned off my power supply at the consumer box in order to fit new light switches. The power to the alarm shares the same circuit, so the alarm power was switched off a couple of times. When restoring the power I noticed that almost all the LEDs on the control panel were lit. I pressed the reset button but there was no response. In fact there is no response from any of the buttons - the panel seems to be in 'lock out' mode. I know there a couple of fuses inside - could one have blown - or is it the back up battery that is kaput? It's over five years old.