Lenovo a7-30 won't turn on, stuck at black screen

Hello.

Yesterday I have bought this Lenovo tablet 2 a7-30.

when I try to turn it on, it shows the Lenovo logo and then it shows black screen for about 5 minutes and then it shuts down.

I can access the recovery and I tried to factory reset it however that didn't help.

Also when the tablet is charging, it shows the battery icon but the whole screen is glitching and is showing random colors and lines.

any idea how can I fix it?

thank you