Screen shows nothing and charging sound is looping
I got an iPhone 5 from a friend that he attempted to replace the lcd/digitizer screen. I opened it up and double checked everything.. everything seems good. No broken lcd connectors, nothing burnt out, etc.. ive reset it multiple times and still just a BLACK screen. I plug it in to the charger and it just make the charging sound every 3 seconds over an over again. Is it the screen? or the logic board? i dont have another screen/or the old one to test. Thanks so much.
heres my video of what it keeps doing : https://www.youtube.com/watch?v=sMNSzGxx...