iTunes update error code -1
We have a iphone 5s in our shop for data recovery. The phone had liquid damage (or so the customer says) we didn't fine much or any sign of corrosion on the logic board.
The phone turns on but does not pass the Apple logo. We preformed ultrasonic cleaning and got the phone to go to the iTunes screen which says the phone is in recovery mode after plugging it in. When we try to update with itunes it says "iPhone could not be updated: error code -1"
Does anyone know what this error might be and if there is a solution for getting past this?
Is this a good question?