Why My Tam Doesn T Work With A G3 L2 Upgrade Card Twentieth Anniversary Mac

Chosen Solution

Installed a Sonnet Creescendo G3/L2 upgrade card in my TAM. It powers up with light green, the disks starts but doesn’t boot, and screen remains black. Tried to reset PRam, CUDA button, unsuccessfully.

You may need the power macintosh card control panel installed for it to boot properly. In my experience I needed it in order to boot without the card enabled first and then install sonnet software and switch the card back on in the power macintosh card panel. Restart and it worked with the new card. Hope this helps.