Responder a:Can I swap logicboard or HDD from one iPhone 6 to anotherSame thing here. iPhone 6 which stopped working all of a sudden. Thought battery was low at first. Try starting it, then booting it, but kept showing white screen with Apple logo. DFU recovery not working due to n/a serial number. Went to Apple Genius Bar in Brussels. The @%^$$@$# wanted to swap it for a new 6 for 350€, or get me to buy a new one. !#^& of. They said the logic board was broken. So will replacing it, fix my problem, without having the problem of missing serial numbers, or mismatches…?