Chosen Solution
Hello, I bought a used iPhone online, unfortunately, it wasn’t exactly as described. The iPhones misses the front cam Assembly and proximity sensor. Note that the touchID cable also has been ripped. When testing using a test-screen I don’t get further than the Apple logo. Could this be because of the missing parts?
Nope. Should still be able to boot without the parts plugged in. You can turn on pretty most devices with a battery, screen, logic board and power button connected. Sounds like either faulty battery or software needing to restore (If you do try to restore software using iTunes please do post the iTunes restore error code if it fails).
Can a iPhone 6 boot without front camera/proximity sensor?