Before you start to disassamble your OGBA make sure it can run games! If you had a broken screen make sure you get sound from the gba booting and from a game running.

We start with preparing the OGBA for the installation. There are optional and required steps:

• remove the crystal from the SP Motherboard with hot air e.g., since the Spartan generates the clock signal for the OBGA (required)

You can heat up the legs on the side with a soldering iron and gently remove the crystal. Take care not to remove surrounding components. On some crystals you can take the lid of and remove the components from the inside.

• desolder the L + R Trigger button (required when using the 3d printed Case from jotheripper, otherwise optional / not needed)
• desolder the charging port with hot air e.g.(required when using the 3d printed Case from jotheripper, otherwise optional / not needed)
• you can desolder the volume-slider with hot air e.g. or cut the plastic slider flush with the board.(required when using the 3d printed Case from jotheripper, otherwise optional / not needed)
• when you choose to desolder it you need to bridge pin 1 and 2 to get full audio volume.
• bridge these pins on the chargingport to enable 3.5mm audio output(required when using the 3d printed Case from jotheripper, otherwise optional / not needed)
• ALTERNATIVE: bridge the P35-Testpoint to GND to enable the 3.5mm audio output(required when using the 3d printed Case from jotheripper, otherwise optional / not needed)
• optional but recommended: get an Power-Cleaner Board:
• After preparing the GPA SP we fix the hookup board with doublesided tape and start soldering the TP-Points to the hookup Board

When everything is hooked up you can connect the hookup board and the displayribbon with the flex cable with the Shield

Make sure the contacts on the SP-Flex-Side display connector point upwards, while the Hookupboard-Flex ribbons blue tab faces up

On the Shield-Side the blue tabs faces up all the time

Now you just have to set the PowerJumper on the Shield:

After that put the shield onto the Spartan Board and start it up - you should get display output, sound and should be able to control the game with a snes controller

Revision specific Mods (not needed anymore with the newest shield revision)

• AGS-CPU-30 - 1K Resistor between Bat- and Bat+

• AGT-ECPU-01 - CK1 is not present on this Board (let me know if you find it ;) ) Use one of the Clock-Pads from the other Board-Side: