Black screen ppx620 how to reinstall firmware

PicoPix PicoPix Max (PPX620)
1

I have installed a android tv launcher on aptoid and after it black screen …
When i connect my google tv key no problem but i have lost the launcher of the ppx 620 .
Is possible to reinstall it ?

2

The same thing happens to me and I still can’t find any solution

3

I find a solution !

4

I have installed Projectivy launcher. Works great and can be set to be the standard launcher.