Emergency water-damage and short-circuit repair at Buynow (Bainaohui), Zhengzhou
When tea, soft drinks, rain or toilet water gets into an electronic device, the inorganic salts and acidic or alkaline electrolytes in the liquid instantly create conductive paths between the tiny components on the motherboard. If the device is powered on before it is completely dry, those paths short the main power-control IC and the electrolytic capacitors straight to ground, burning out the CPU or the board substrate in an instant and causing permanent failure and data loss.
What is more insidious: even if a water-damaged device air-dries and manages to boot, residual electrolytes and moisture react with the air and within just a few days produce green corrosion (copper verdigris) on the fine copper traces, gradually eating through microscopic board traces and producing intermittent crashes or a slow death that is extremely hard to diagnose.Fengniu Tech (Henan) We are equipped with a high-energy ultrasonic bubble cleaner and a vacuum high-pressure constant-temperature drying oven, and led by a senior technical team from Huaqiangbei. We clean the board thoroughly and dehumidify it deeply at the earliest opportunity, then use an infrared thermal camera to pinpoint shorted components, keeping water damage to a minimum.
Our no-compromise water-damage rescue plan
Industrial-grade ultrasonic precision board cleaning
Water damage almost always leaves salt and impurities trapped under components. We disassemble the device, take out the motherboard, place it in an industrial cleaning tank and use high-purity electronic-grade anhydrous alcohol; the physical cavitation of high-frequency ultrasound washes away mold spots and salt crystals completely.
High-vacuum constant-temperature motherboard drying
Air drying cannot remove the traces of moisture trapped in the crevices under chips. We use an industrial vacuum drying oven at a safe constant 55 °C, so moisture deep beneath inductors and ICs vaporizes and escapes, achieving residue-free drying at micron level.
Infrared detection and instant replacement of shorted components
Forcing a water-damaged device to power on often punches a filter capacitor through to ground. We power the board from a precision digital DC supply and use an infrared thermal camera or the rosin-vapor method to catch the capacitor that heats up, then desolder and replace it quickly and precisely.
Chip-level board transplant and data extraction after water damage
For extreme cases soaked for a long time in seawater or highly corrosive liquid, where the PCB substrate is completely destroyed, we can safely desolder the CPU and NAND flash chips at chip level and transplant the full set onto a blank board to extract complete data.
Standardized water-damage rescue process
1. Fast teardown and power cut
Teardown starts within 3 minutes of arrival
Battery flex cable physically disconnected to cut power
2. Precision ultrasonic cleaning
Motherboard immersed in industrial ultrasonic cleaning solution
High-frequency cavitation breaks up corrosion under the chips
3. Vacuum constant-temperature drying
Placed in a high-vacuum precision drying chamber
Baked at 55 °C to drive out every trace of moisture
4. Resistance re-measurement and testing
Full ground-resistance check with a multimeter
Power-on test passed, 180-day warranty
Fengniu Tech's three ironclad guarantees
1. No labour charge if we cannot fix it: If corrosion has gone on so long that key chips are physically blown through and the motherboard is judged beyond repair, we guarantee you will pay nothing - no teardown labor, no diagnostic fee.
2. Full compensation for damage: If our engineer's mishandling during disassembly or cleaning causes irreversible physical damage to the board, we will buy your device outright at full value or provide a working used device of equivalent condition as compensation.
3. Transparent 180-day warranty: For every water-damage short we repair, we provide a 180-day warranty with a printed e-warranty and in-store follow-up support, so you have nothing to worry about.
Water Damage Repair FAQ
[Do not try to power it on, and do not charge it!] This is the key rule. Once liquid is inside, it immediately forms conductive paths; forcing power through can instantly punch through the CPU or the main power chip, turning a device that a simple cleaning would have saved into a physical write-off. First, force it off right away, disconnect the battery if it is removable, and get it to a professional shop for ultrasonic board cleaning as soon as possible.
[This is a dangerous myth!] Hot air from a hair dryer speeds up the movement and evaporation of moisture inside the phone, spreading the electrolyte corrosion further, while rice absorbs water extremely poorly and cannot pull out the stubborn moisture under the board's chips. Given time, the board corrodes and oxidizes until it is ruined. A water-damaged device must be disassembled by an engineer and treated with industrial ultrasound and a constant-temperature drying oven to remove the risk completely.
If, after diagnosis and deep rescue work, we conclude the chip damage is too severe to repair, we solemnly promise to charge nothing at all - no diagnostic fee and no labor charge. You face an accidental water disaster with no financial or emotional burden.
For the great majority of devices that were not forced on or charged after the water damage and reached us promptly for deep ultrasonic cleaning and vacuum drying, the corrosive residue and moisture have been physically removed, so there are virtually no after-effects and the device can be used reliably long term. If, however, a water-damaged device is left for too long and the inner layers of the board have corroded badly, even a successful repair leaves a higher chance of intermittent failures than a normal device.
As long as the NAND flash chip and the CPU have not been destroyed by high voltage, the existing data is safe. If the water damage is severe and the board's printed traces are completely corroded so that the device is beyond economic repair, we offer a data-only service: the CPU and NAND chips are fully reballed and transplanted onto a blank board to run, letting us safely extract photos, documents and other important local data.
