Chosen Solution
got a liquid damaged 6s plus in this morning not powering on. c2331 was shorted so removed it and the phone is working fine apart from the flash light / flash. any ideas @refectio
You’ll want to check out the strobe circuit. Specifically look at the PP_LED_DRIVER_COOL_LED & PP_LED_DRIVER_WARM_LED outputs to see if they are shorted or low voltage.