Robot vacuum won't turn on, shows Error 5/7/12/21, doesn't charge on dock, unresponsive to buttons or app, LiDAR not spinning, wheels not turning but LEDs blinking — in most cases the issue is in the control board (mainboard). Mainboard repair allows device recovery without expensive control unit replacement. Grade service in Khmelnytskyi performs micro-repair of control boards for robot vacuums Xiaomi, Roborock S/Q series, Dreame, Ecovacs Deebot, iRobot Roomba, Eufy, Viomi, Philips, Tefal and other brands: recovery after liquid damage, component resoldering, replacement of power ICs, motor controllers, Wi-Fi modules and corrosion cleaning.
What the Service Includes
Robot vacuum mainboard (control board) repair includes:
- Full robot disassembly: access to board, battery & motor disconnection
- Visual & microscopic diagnostics: corrosion detection, burnt components, board cracks
- Ultrasonic & manual board cleaning from liquid residue & oxidation
- Power circuit verification with multimeter & oscilloscope: 3.3V/5V/12V rails, shorts, opens
- Resoldering or replacement of damaged parts: MOSFETs, DC-DC converters, capacitors, power ICs
- Liquid damage repair: corrosion removal from multilayer boards, trace restoration
- Motor controller, LiDAR driver, sensor IC repair/check
- Board testing off-robot on bench: firmware boot, peripheral device check
- Firmware update/reflash if needed, error reset
- Final in-case testing: full cleaning cycle, dock return
When You Need the Service
Mainboard repair is required when:
- Robot won't power on or LEDs blink without response to buttons
- Persistent errors Error 5, 7, 12, 21, 26 (board/power/sensor issues)
- After liquid exposure or strong impact device stopped working
- Doesn't charge on dock, doesn't detect base but battery OK
- LiDAR fails to start/spin or shows navigation errors
- Motors/wheels don't turn but LEDs work
- Wi-Fi won't connect, robot disappears from app after reset
- Board area overheats, robot shuts down after few minutes
Work Stages
- Initial diagnostics: owner interview, external check, power-on attempt, error log reading
- Disassembly & battery disconnection for safe board work
- Ultrasonic & manual cleaning from corrosion & contaminants
- Microscopic component/trace/solder joint inspection
- Voltage measurements, power circuit & short-circuit check
- Resoldering/replacement of faulty elements (ICs, capacitors, connectors)
- Bench testing: firmware boot, full peripheral verification
- Reassembly, sensor calibration, full cleaning cycle testing
- Stability verification & detailed work report
Why Choose Grade in Khmelnytskyi
Grade has extensive experience in micro-repair of robot vacuum control boards, using professional equipment (soldering station, microscope, ultrasonic, oscilloscope) and original/quality components. Clients value high recovery rate for expensive models without full board replacement. Additional services include laptop repair, PC repair, phone repair, TV repair, coffee machine repair, charging station repair. Reviews — here.
Address: Khmelnytskyi, Panasa Myrnoho str., 31/3
Schedule: Mon–Sun 11:00–20:00
Phone: +380 97 719 4430
Telegram: Telegram
Easy from anywhere in Ukraine
Not in Khmelnytskyi? Ship your robot vacuum via Nova Poshta. After mainboard repair the device returns fully operational. Details on the Nova Poshta delivery page.
