オリジナル投稿者： Minho ,
Hi Tomáš. I would always clean the entire board. Just because you can't see any water or corrosion, that doesn't mean that no water came in contact. It may also be under the IC's, particularly the PMIC, CPU, NAND, Touch IC's etc. So it's always important to do a full cleaning procedure. CHG_ACT_DIO will go low (0V) when it detects something in the charge port. When that happens, VCC_MAIN & BATT_VCC are connected together via Q1403 and battery charging occurs. The phone will work regardless of the logic level of CHG_ACT_DIO. Is the phone working properly except for the charging issue (''to this problem is board fully working (i can power on board)'')?