Can anyone assist I have a no.1 D5 that after adding watch faces now

Can anyone assist I have a no.1 D5 that after adding watch faces now won’t turn on. It also isn’t recognised by my PC so can’t flash it. Any help appreciated

try to disconnect the battery and reconnect it again and see, actually you can connect your watch to pc through SP F. Tool and flash it.

I’ve tried the battery disconnect method but doesn’t work. Will the sp tool work? As I can’t actually connect it to a PC?

even if it still off you can still connect it to the pc and flash, Smartwatch Ticks has a video on that for the watch.

this is his channel: