I thought I had killed my board over the weekend. I tried to adjust Vcore in TurboV Core, moved the slider from 1.6 to 1.625 V, clicked apply - instant death, code 8_. After drying everything up and waiting a few hours the board displayed only 0I (not 01 - vertical bar on 2nd segment closer to first segment), even with other CPUs, memory combinations, CMOS clear - anything I tried. I left it to sit without battery overnight and flashed 1107 this morning with USB flashback, and behold, it lives