Apple TV logo and light flashing

I cannot reset or restore my Apple TV. I’ve tried holding down the remote as directed and also attempted to restore it through iTunes but nothing recognised the device once plugged in. The Apple logo flashes on and off my screen followed by my actual tv saying “no signal”. The white light on the actual box is flashing repeatedly as well with no stopping. I’ve tried every prompt I can find but still no luck! All I did was do a routine system update because I was told I needed to now it’s not turning back on. Help please!