hard one ...
maybe try to check areas where you droped it (like if it went corner then check the parts that are on corners
if you drop something you put mechanical stress on the components (shockwave) and some traces may break or solder joints will break or rip or even a cable can disconnect with bad luck
i'm gonna say it will be really tough to repair it
try reconnecting anything ....
if your device has some kinda recovery or download mode than try enter this
is your screen dead or smth else? does it vibrate or respond or anything?
maybe try to just put a bit stress on the pcb (don't overdo) and try to start it?
i could be that smth on the pcb has microbreak and you need to do level 3 repair for that ....(without equipment nearly impossible)
maybe try to check what's dead, if you have 2 tablets (friend...family... etc.) you can swith boards arround and check what's dead
if that's the main PCB (i think) then it's gonna be hard to repair
let me know if you tried smth.