Some Help with Supro 1960T

[Travis]

Hi!

I wanna know how can I check where is the problem on my Supro 1960T.

Thanks

video:
https://drive.google.com/file/d/1QtJjcMc1Fi2pkPdsuHvOWil7fMhNr6MX/view?usp=sharing

 

[Travis]

Some ideas? Thanks