Neo Geo:General Troubleshooting (AES): Difference between revisions
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== Unstable Image / Losing Sync == | |||
If you are losing sync on your AES, especially when a bright screen is displayed, you may need to recap the system. You can also replace the following components for a better sync signal (as the values used on the board were for cost-cutting). | |||
* Replace the four 68ohm resistors near the AV output port with 75ohm resistors. | |||
* Add 220uF capacitors in the empty footprints near the AV output port. | |||
== Solid Color Screens == | == Solid Color Screens == | ||
Latest revision as of 16:14, 15 March 2024
Unstable Image / Losing Sync
If you are losing sync on your AES, especially when a bright screen is displayed, you may need to recap the system. You can also replace the following components for a better sync signal (as the values used on the board were for cost-cutting).
- Replace the four 68ohm resistors near the AV output port with 75ohm resistors.
- Add 220uF capacitors in the empty footprints near the AV output port.
Solid Color Screens
If your unit displays a solid color on the screen, check the below table for its meaning.[1]
| Color | Diagnosis |
|---|---|
| Blue | All tests passed, cartridge not detected. |
| Cyan | Memory card error, blank card. |
| Red | Work RAM error in 0x100000 region. |
| Green | Palette RAM error in 0x400000 region. |
| Yellow | Video RAM error. |
| Pink | BIOS self check error in 0xC00000 region. |