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Modification Neo Geo AES

There are a number of modifications and enhancements we can perform on the Neo Geo AES console. We can either perform the full works - that is all four modifications for a combined and reduced price, or individual modifications. The choice is yours. Each modification is described in detail with pictures where appropriate. Please use the Console Modification Enquiry form to request any of these modifications or to ask us any questions.

Neo Geo AES Full Modification - £80 UK plus return postage

The full works! All four modifications to really get the best out of your Neo Geo. We add a 50/60Hz switch or set to 60Hz as default (your choice), a blue power LED, perform an RGB modification and purchase and fit the latest UniBIOS chip for you.

Addition of 50Hz/60Hz Switch - £20 UK plus return postage

In a similar way to most other consoles we can add a 60/60Hz switch to the Neo Geo AES. This changes the video output mode between 50Hz and 60Hz. UK consoles run in 50Hz mode as standard so they run 20% slower than US or Japanese machines and have those horrible black borders at the top and the bottom of the screen. Your TV must be able to run a 60hz signal for this to work correctly in full screen mode. This modification is useful if you want to run a Japanese or US Neo Geo AES through an older TV that does not play a 60Hz signal as you can run your console in 50Hz mode. Alternatively, we can hard wire your console to play just 50Hz or 60Hz as standard.


 King of Fighters 95 in Standard 50Hz Display

 King of Fighters 95 in Modified 60Hz Display

 King of Fighters 95 in Standard 50Hz Display

 King of Fighters 95 in Modified 60Hz Display

Addition of Blue Power LED - £20 UK plus return postage

Oddly and annoyingly the Neo Geo doesn't feature a power LED. Many times we have left our console switched on overnight - sometimes even for days. This causes the console power supplies to overheat - even more so if you are running an import console through a step down transformer. The neat addition of a power LED set into the reset switch will overcome this problem. We normally fit funky bright blue LED's however we have other colours available should you wish.

 Neo Geo AES Blue LED in Switch

 Neo Geo AES Blue Power LED

RGB Modification - £30 UK plus return postage

In later releases of the Neo Geo AES console, SNK made changes to the video output which resulted in a darker, softer picture with visible vertical lines down the screen. We can perform an RGB modification that restores the NEO GEO to it's original clear, crisp output. You will need and RGB Scart Cable and an RGB compatible TV to fully appreciate these changes. We sell the RGB Scart cables in the Neo Geo AES Hardware section. Typically, you will not need this modification if your console serial number is lower than 85,000.

3 Count Bout Poor Video

3 Count Bout Modified Video 

 Metal Slug Poor Video

Metal Slug Modified Video 

 Typical video output on a Neo Geo

 Video output after RGB Modification

Purchase and Fit an Official UniBIOS Chip - £50 UK plus return postage

We can purchase and fit the awesome UniBIOS chip to your Neo Geo AES console. We professionally desolder your old BIOS chip and install a socket in place of your existing Neo Geo BIOS with the latest UniBIOS fitted in the socket.



This means that in the future, when a newer version is released, you can remove the UniBIOS chip and upgrade to the latest version should you wish. The chip is officially numbered and licensed to the owner. It comes with the manual to explain all the features and details of how to upgrade to the latest release in the future.


The UNIVERSE BIOS is for owners of MVS or AES hardware that want an easy way to change country region or between Arcade or Console mode on boot. Also included are other features that are not possible using the standard bios. The UNIVERSE BIOS is also designed to give easy access to things like inserting coins, test mode and memory card management when using the joystick ports only. Of course the BIOS still allows standard operation too.




The ability to quickly and easily change country region (great for games that disable blood under USA region). Once region and operation mode is set the BIOS will remember settings until you change them again.


Want unlimited lives or energy... Then cheat in games using the built in cheat engine which currently holds over 1570 cheats! If you are not happy with the cheats already there then you can patch directly into memory any place you like adding your own.

Jukebox player where one can listen to game music without sound FX from gameplay over the top. Nice option if you want to create MP3's.



A ROM CRC32 check where you can confirm a games program roms are good.

Access to the DEBUG DIP's and DEVELOPER mode.




Look at internal memory with the built in memory viewer. This is handy for tracking faults with carts that simply won't start.

Arcade VS-MODE support which is known to be in the version 6 JAPAN bios. Turn this feature on via hard dip 2.

Arcade mode lockout protection removed from latest games when running on AES hardware (bypasses the red warning screens).

The ability to soft reboot the system without the need of powering off and on.

For more information on the UniBIOS visit the UniBIOS Homepage.

Please use the Console Modification Enquiry form to request any of these modifications or to ask us any questions.