GCS,
Most cells last 5 to 7 years...
How big is your pool in gallons??
The entire cell, including all the lights work off of the 30 to 40 Volts DC that comes from the Surge card (Power supply card) and goes to the cell. If you have 30 to 40 volts, with the cell connected, and the cell has no lights, the cell is bad.
Thanks,
Jim R.