plug in the power cable and put main switch in box in position 1 (on).

Sorry, your description is just useless...

"only red light" means it's still booting. Nothing on display? Then it seems to be broken or the flash is damaged.
You could try to reflash the box with any image after you managed to boot into what's called "rescue loader" and if the LAN port is working and you can access the box from your PC.
Before you ask how to enter rescue loader, search for it here or google it.

Try to reflash, mostly it solve any problem

Sent from my droid

I would recommend to gather a bootlog by mini-usb:
Howto: Bootlog bzw. Log erstellen

Perhaps memory of the box is defect.

if you have a 4k tv , try disabling uhd-colorspace ... you can re-enable it, after an online-update ...