I was going to give my son's iPhone 13 to my daughter. About 2 months ago I reset it to factory settings (completely erased it). That seemed to work, it was showing the welcome screen with 'hello...' But now it is totally dead. I took it to Apple, but their efforts to revive it failed (no explanation as to why it would suddenly die). They want like $450 to 'fix' it. Anything else I could try?