Replacing a NAOMI Fan
From Arcade Otaku Wiki
If your Naomi is noisy, the fans are probably old and worn, and would benefit from a replacement.
The CPU fan is a "109p4405h8016", it's 5V and 3 wire, and actually needs to be 3 wire. If the motherboard doesn't get the fan pulse, it won't boot.
Case fan is a Panaflo FBA06T12H, a direct replacement with equal or better specs, but 27dB instead of 32dB noiselevel, is Papst 612F/2.
