オリジナル投稿者： Ben ,
The triple buzz indicates the phone has USB restrictions enabled until the phone is unlocked. This means that the phone can boot up normally to the lock screen but it appears there is a problem relating to the display connector or circuitry that connects to the connector. Seeing as you have tried another screen that eliminates the screen being at fault. I'm afraid this will require board-level repair to get this fixed. A local reputable repair shop that does micro-soldering may be able to fix it for you.