I also had a Paradigm subwoofer that the plate amp broke. They fixed it for $125.
I don’t have much faith in Switching Power Supplies. They seem to have a high failure rate and are difficult to repair.
At work, (retired) I had no trouble repairing the power supplies of old.
TV - LG 65B7P OLED / Receiver - Yamaha RX-A1040 7.2 / Blu Ray - Oppo BDP-83 / Turntable - Technics SL-3300 / Cable Box - Comcast X1 V4 4K /L & R Paradigm Studio 20 V3
Center - Paradigm CC-470 V3 / 4 Surrounds - Paradigm SA-15 V3 In Walls
Subwoofer 1 - Sunfire HRS-12 / Subwoofer 2 - Paradigm PW-2100