I had a similar problem on 500mhz TiPB--replaced the battery--no change. The cutouts seemed to follow no pattern. I tried all the shim the battery recommendations Opened it up and tightened lots of loose screws(Don't know why they were loose). Finally sent in for Applecare. They replaced the wiring harness for the battery. Works great. Now I even have a second battery Jim Reamer wrote: > Hey, > My TiBk (1gig, 512 mem, OS 10.3.3) is giving me fits. It runs fine > while plugged in. When I close it up and reopen it, it will often cut > out and I have to restart. By "cut out" I mean the screen remains black > and totally unresponsive. The little light near the center of the hinge > remains on, but nothing will coax the thing to show life. Sometimes I >