My A20 hand an encounter with a wall. the wall won. Cracked the screen. Ordered and replaced the screen. ( Something I’ve done quite a few times on J3’s…) it seems to power on, but no screen at all. when plugged in I get the charging chime… I’ve examined the ribbon cables with a magnifying glass, there does not seem to be any damage there. I ’spose it could have damaged CPU board… what am I missing?