Observing the motherboard after disassembling, the corrosion is not serious. When the battery is not installed, plug in the charger for the mobile phone, and measure that the positive voltage of the battery is only 1V, which is obviously low. After replacing the charging IC, the charging current returns to normal.
OPPO A83 mobile phoneno booting, do not recognize Nand, redo Nand, and solve the problem.
OPPO Reno4 mobile phone Won't Turn On, direct Reballing power chip fault solution.
OPPO R17 Pro Bluetooth can't be turned on, the line is disconnected, and the fault repair of Jump wire for bone scraping.
Oppo X2 Pro Won't Turn On, after inspection, is judged to be damaged, and it is repaired after replacement.
The charge of the A5 mobile phone becomes less and less. Measure the connected components to determine that the D2903 is damaged. After being removed, the fault will recover.
OPPO Reno5 mobile phone Won't Turn On, after measurement, determines that the power chip has no output, and repairs the fault after replacing the power chip.
