Failed Stack Member after power failure

[KHouston]

I have 3 ICX7150-48PE, each with a 4x10FG 4-port 40G Module that have been in production for several years.    Over the weekend we had an extended building power failure where the switches lost power.   On restart, the 3rd switch will not connect to the stack.   I have looked at the config, checked cables, changed cables, restarted, and I get the same results.   The link lights work for endpoints that were connected to the switch, but the link lights on the stack ports are dark.  I have not configured switches in 4 years, so am I missing something, or is the 4-port module fried?

My exact configuration and status:

Show Stack 1

ICX7150-48PF active d4c1.9e59.c340 245 local Ready
2 S ICX7150-48PF standby d4c1.9e59.c810 240 remote Ready
3 S ICX7150-48PF member 0000.0000.0000 230 reserve

---show run cut---

stack unit 1
module 1 icx7150-48pf-poe-port-management-module
module 2 icx7150-2-copper-port-2g-module
module 3 icx7150-4-sfp-plus-port-40g-module
priority 245
stack-port 1/3/1 1/3/3
stack unit 2
module 1 icx7150-48pf-poe-port-management-module
module 2 icx7150-2-copper-port-2g-module
module 3 icx7150-4-sfp-plus-port-40g-module
priority 240
stack-port 2/3/1 2/3/3
stack unit 3
module 1 icx7150-48pf-poe-port-management-module
module 2 icx7150-2-copper-port-2g-module
module 3 icx7150-4-sfp-plus-port-40g-module
ignore-temp-shutdown
priority 230
stack-port 3/3/1 3/3/3
stack enable
stack mac d4c1.9e59.c340