atcomsystems.ca/forum Forums TDM Business Telephone Systems NEC Telephones & Systems Lights out on all NEC ipx phones

I have a customer with an Elite IPX 5 years old. It has 5 phones and 2 lines, no voice mail. Maybe alittle overkill here.
All phones have a dead display and the ports have a fast clicking sound.
The analog ports have battery, but no dial tone. They had never been used.
Any help on the outage?.....Will the phones work with older NEC systems? He wants me to swap it out if it is too expensive. Looks like a fine system, maybe more than he needs.