Chosen Solution
Back in February my iPhone suddenly went to the apple screen, grey and then black. It repeated this until it went dead. Every time I plug it in to charge it it does this same thing. I have had problems with this phone before this happened, like my phone screen freezing. Eventually I just gave up and I have been going on without a phone since. But I have finally given up and tried to find ways to fix it. I have already tried reseting it from my computer but it didn’t work. Any other ways to fix it?
This is a belated answer so hopefully it can be of use to folks who search for and find this question. Beyond the usual “update iTunes, try new cables and computers”, iTunes Error 9 can be either CPU or NAND related. In your case, the fact that your phone has been dropped a lot would indicate a logic board issue. Either way, these are advanced micro-soldering repairs, especially the CPU repair (which consists of grinding down the CPU package until you have access to some deeply embedded copper pads so that the connections can be restored to the EEPROM). Suffice it to say that this is not a DIY repair and one which very few micro-solderers can accomplish. The NAND repair, while advanced, is more straightforward. If you want to have it repaired, contact some micro-soldering repair shops and ask them if they have successfully repaired Error 9 before sending them your phone. You don’t want some mucking up the CPU on YOUR device, especially if you need to recover the data.
