Q: After software update apple rv light flashing and not coming on

Try THIS first:

Restarting your Apple TV (2nd or 3rd generation) with an aluminum Apple Remote

Press and hold Menu and Down (buttons 3 and 4 below) on your aluminum Apple Remote for six seconds and then release when you see the LED light on the Apple TV flash rapidly.

It worked for me!

C

Try this:

Restarting your Apple TV (2nd or 3rd generation) with an aluminum Apple Remote

Press and hold Menu and Down (buttons 3 and 4 below) on your aluminum Apple Remote for six seconds and then release when you see the LED light on the Apple TV flash rapidly.

Just an FYI: those posts were from last year so they are probably long gone by now