Neo Geo:Chip Replacements

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Some chips on Neo Geo motherboards can go bad. Luckily, furrtek created some drop-in replacements for these chips.

Replacement chips:

Symptoms

NEO-BUF

  • Random reboots during gameplay, particularly on a 161-in-1 cart.
  • Green screen on boot, and it's not a typical calendar error.

= NEO-ZMC2

  • Vertical stripes to appear on sprites.
  • Completely missing audio on MVS systems


Installation

  1. Remove the faulty chip with hot air.
  2. Remove the remaining solder on the PCB pads with solder braid if the surface isn't perfectly flat.
  3. Clean up the eventual flux residue with IPA.
  4. Place the NEO-BUF replacement board in the right orientation (see pin 1 mark), align it precisely, and solder the 4 corners using a generous amount of flux.
  5. Drag-solder all the sides or solder each pin individually. The small castellated contacts will "attract" solder by capillary action. Make sure none of the contacts are bridged.
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