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Yes it is an ALGE SF2 system. Not the oldest type because of the the black face plate. Earlier ones had silver face plate.

Put new 9v rechargeable battreries in the SE start unit and see if it comes to life .

The ZE finish unit sends voltage up the pair of wires to charge the batteries and run the system.

All of the intelligence is in the ZE and SE units. The display board is just a display.

 

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