Ring Battery-Powered White Wireless 1080p Outdoor Smart Camera with Spotlight with PIR Sensor

Have two of these installed. Front and back. Both lost connection to the network on the same day and have been unable to connect to them since. De registered one of them to see if i could re install it. Has fully charged batteries, however will not connect via the wifi. Reset button on top of the units does not work as expected, no flashing lights. As they are 5 years old is it time to replace them or what. Have the ring plan plus Thanks