M,
If the cell has no lights, it is not getting power..
To get power to the SWCG several things have to happen..
1. The pump/filter relay much be closed.. This happens when in the pool or spa mode and the pump is running or supposed to be running.
2.. The pump/filter relay should have constant AC power on the line side of the relay. When the relay closes this power comes out the load side of the relay.
3. The pump/filter relay sends the AC power to the SWCG transformer .. the transformer changes the high voltage (120 or 240 VAC) into about 24 VAC.
4. The 24 VAC from the transformer goes through the little SWCG circuit breaker on the main enclosure panel and then to the SWCG power supply card (Surge card).
5. The surge card coverts the 24 VAC into about 40 Volts DC..
6. This DC voltage is what is sent to the cell and makes the cell work and the light turn on.
Do you have a voltmeter??? If you have a voltmeter I can walk you through what to test..
I agree with Marty.. your old cell is most likely good..
I am assuming your EasyTouch has an Internal SWCG transformer and power supply... If you have an External power center, then most likely you popped the fuse..
Thanks,
Jim R.