sync to computer without passcode on iphone
the screen is broken on my iPhone so I can't input the passcode. so how can I sync to computer?
If you have never synced to the computer before, you will not be able to unless you enter the passcode. This is to prevent someone from syncing your device if it was stolen.
Do you recall if you had iCloud backup turned on ? If so, you may have a backup file stored in the cloud. If not, there is not much that can be done.