RN4220 PSU dead

Hi.

I have encountered PSU dead issue.

Current device is RN4220s.

I have reached to region support team to get help, however; all I received was that warranty has been expired and I will never get any support in regards with H/W fault issue.

Since this device is very crucial to my business, is there anything I can do to fix?

I cannot even search what p/n is for psu.

Your adivce will be very grateful.

Thanks.