SNK — Neo Geo AES
This rev 3-4 AES was a service and upgrade rather than a fault chase: a full Console5 recap, a Unibios 4.0, the FirebrandX audio fixes that apply to this revision, and the 68 Ohm to 75 Ohm video resistor change. The VRAM was socketed preventatively while the board was open. Tested with Metal Slug X on a NEO SD Pro.
This is the first AES that I managed to win at auction, back in 2021, a couple of months after the Neo Geo CD. I eventually got around to work on it, performing a full recap and installing a Unibios 4.0, as well as performing the @FBXGargoyle fixes for this rev. #neogeo
Since this happened after I fixed the other AES unit with the sprite fault, when I installed the Unibios, I also socketed the VRAM. Which you can just about see it on the top of the first 2 pics and then on 3rd pic, just in case... You never know what the future holds in store.
Then I performed a full recap with a console5 cap kit, you can just about see in the first pic that the 68 Ohm resistors were changed out for 75 Ohm ones. Better view in 2nd pic.
In these pics you can see the FirebrandX fixes for the audio section, that apply to both this rev 3-4 and the unit which I fixed, which is 3-3. Including swapping the polyester caps, although that would be hard to spot in the pic as they look the same.
I wrapped up the work with a Metal Slug X test for validation, running off of my NEO SD Pro.
SNK — Neo Geo AES
Sega — Mega-CD 2
SNK — Neo Geo CD
Sega — Super 32X
Sega — Saturn
Nintendo — Super Nintendo Entertainment System (SNES)
