Genesis won’t play sound for all games…

Hello all, I have a Genesis that has a rather odd audio problem. Sonic will play with no issues, sound and video both work wonderfully. However Jurassic park will only give me video. I have opened the game cartridge and poked around with a multimeter and continuity is just fine between all pins and their respective points on the chip itself. I have replaced the capacitor on the cartridge and have also cleaned the pins as well as touched up all of the Solder points on the chip. I have heard that this problem could be related to the different ways the Genesis plays audio. This problem is happening on both TV speakers as well as the headphone jack. I have cleaned the cartridge slot and recapped the motherboard. I believe I have a VA6 motherboard revision. Thanks guys!