Chosen Solution
Hey there! I recently bought an iphone 6s with a cracked screen so i could learn how to fix iphones , Thing is when it boots up it goes to itunes screen but thats it. I have tried hard-reset but to my surprise it goes back to it. Tried restoring it via itunes or 3utools but i am getting the error 2009 , When itunes restarts it to recovery mode an apple logo appears but then it gets stuck and it “disconnects” from my pc which stops the recovery. I have tried different computers, different ports, cables and nothing. Tried a different screen , battery and dock connector , disconnected the proximity sensor and nothing , Thought of it being a motherboard issue though the crack / hole was near the loud speaker so i thought about it and maybe could be water damage , i submerged it into 99% isopropanol alcohol and still the same thing. Nothing changed and giving up a bit after doing this a week now
ITunes error codes are hard to interpret as they can change with the iOS version. Error 2009 is typically a communication problem with usb communication. Since you have ruled out parts, cables and connecting devices I would first try and replace Tristar than maybe the NAND depending on how it is behaving on a restore with 3uTools.
