How to flash Geforce 7300 GT ROM to revision 3022?
My recently purchased "broken" 24" iMac 2111 will boot into Safe mode, and the desktop appears normal, with no visible graphics defects. However, in a normal boot, it always gets stuck after the apple icon and spinning windmill, no matter what boot source is used, the HDD, any DVD, or a USB flash stick.
The memory is 1GB + 2GB, and I tried each separately, in both slots. No change.
The Geforce 7300 shows as having ROM revision 3467 instead of the more normal revision 3022, or 3021. Since Safe Mode appears to work perfectly, after I erased the HDD (accessed via T-boot) and restore/copied the entire HDD from a similar iMac, I suspect some incompatibility between the boot-rom and the graphic ROM.
How can I re-flash the graphics ROM to revision 3022?