Chosen Solution
I just installed a new screen on my G7 power{purchased from ifixit). I got it all back together and it won’t turn on. I didn’t break anything and was very careful not to damage anything. Went back together just add it came apart
have you tried plugging it in and see if itll come on? if it does then your battery cable is either not seated right or has been damaged. if the power cable doesnt turn the phone on id recommend taking the phone back apart and verify connections and look carefully at the pins and ribbons. if you post some good pictures i could take a look also good luck
