It was most likely the power supply unit. "Big Transformer" It can be removed by removing the 4 screws that holds it in the cabinet. Then it slides out.
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
Update: two days later system started reseting, floated several telephones but had to reconnect because customer had to have them. moved phones around and filled empty ports went from 5 cards to 4. worked ok for 3 or 4 days. still resets but not as often. Resets seem to be random their is not a lot of traffic on system, realestate office with about 29 phones and 2 opx adaptors for voice mail, most of the time there isn't but 4 or 5 people in office at one time.
Well I replaced the system with a Vertical SBX... no more reset problems.
The system was properly grounded, it was on a good UPS, There is a Tri Output PS but it feeds two opx adaptors and powers amplified speekers all of which has been floated and the system still reset. There is no patern or time when the system is more likley to reset it was all just random.
By the way I have an Executone IDS 84 phone system with a 2 port VMS for sale...cheap!