This new flex pcb gets rid of the annoyingly loud hum from the audio that usually is inherent with those newer LCDs that plague SOME GBA after being installed. A capacitor kit like the one on this site usually gets rid of the hum but GBA even with a capacitor kit can still get this loud hum but this gets rid of it entirely.
Here is an example of the noise this mod cancels:
The newer LCDs are pretty power hungry and noisy so this passes onto the audio since the onboard amplifier is powered from the same power rail that the LCDs use, this mod is essentially increasing the capacitance of the same power rails to smooth out the voltage and therefore noise on the power rail.
There are 2 options for this Flex PCB, one with 1 cap for people who already have my Cap Kit installed and you can reuse the 470uf capacitor on CP2 location where you can transfer over to the Flex PCB and one for people who do not have the Cap Kit from this site. Below I have 2 installation videos for both options.
