PTP800 Not going into recovery

Hello, I am helping a client out with some PTP800 links. The CMU’s modem LED is solid red as soon as power is applied. There is no ethernet link on ether port. We have tried holding the recovery button in and applying power yet no change in the LED’s nor ethernet links coming up. We have about 5 radios so far like this between the different sites. We can’t belive this many radios all having this same issue that were running before power was disconnected to them in the past two years.