170 problems

OK, newbie here in UK, started with 900 (still with caps problem, but I’ll sort that I hope) Today’s grief is 170 woes. Good thing, battery OK. However the following videos show what happens on start up, and even if it’s the belt, it will not boot into factory mode. Experts here? Thanks…

Hi and welcome to the forum.
It most likely is the belt, but the mech does not sound nice with the grinding gears.
Factory mode can normally only start after the belt is replaced.

I would start with the belt.