my RED appliance is not under warranty and now they are not working, please suggest any solution for the same

First you need a network protection license to get the red service on the utm running.

Then we need to know the problem:

Here are the LED blinking codes:
RED v1 (without USB): www.sophos.com/.../115431.aspx
RED v2 (with USB) + v3 (the white one): www.sophos.com/.../116173.aspx

Most hardware problems are power supply related. The original power supply sucks! If the power led is green does not necessarily mean the ps is OK. Try any other ps with 12V and 1.0 or better 1.5A. Sometimes the ps won't work if another ps stucks in the same power strip (a kind of voodoo).

If the ps is OK. The power led is on, but the device fails to boot you can try to re-flash the device (RED v2 and higher).
Otherwise th parrot is dead.

Good luck.

First you need a network protection license to get the red service on the utm running.

Then we need to know the problem:

Here are the LED blinking codes:
RED v1 (without USB): www.sophos.com/.../115431.aspx
RED v2 (with USB) + v3 (the white one): www.sophos.com/.../116173.aspx

Most hardware problems are power supply related. The original power supply sucks! If the power led is green does not necessarily mean the ps is OK. Try any other ps with 12V and 1.0 or better 1.5A. Sometimes the ps won't work if another ps stucks in the same power strip (a kind of voodoo).

If the ps is OK. The power led is on, but the device fails to boot you can try to re-flash the device (RED v2 and higher).
Otherwise th parrot is dead.

Good luck.