Moisture has been detected - How To Fix Samsung S9 - Motherboard Repair.
Moisture detected error happens a lot on Samsung phone charging. In most cases, it is caused by charging flex cable faulty. Hence in the first place, we replace the charging flex cable with a new one. However, the problem still exists. Then we test the motherboard and find out that the OVP IC has been faulty. We replace a new OVP IC and problem solved.