Good suggestion to read the manual! I did. I only have 4 KX-T0155 CSs, 6 KX-DT333Bs, one Doorphone and Caller ID card in addition to the built-in HLC and LCOT4 cards, a DLC4 and a DLC8. Based on those devices (if I read the manual power calculations correctly) I shouldn't need a second PSU. Maybe the original is no longer putting out its specified voltage(?) I will meter it and add a second PSU and see what happens. The power calculations don't show a need for an MEC card as configured.
I will also check the card versions next week.
Thanks again, Brokeda
