Touchscreen not working

Have a switch in (HAD-CPU-01 board) that had damaged port and a small amount of liquid damage, replaced port and M92 and revived the system but now the touchscreen doesn’t work, have checked the connector and flex for damage , and the connector for the card reader assembly , the only thing i can find is that the cap near the card reader connector on the main board is short both sides.

Anyone advise where to start looking , or could it just be the cap has blown / failed ?