Lcd led digital intelligent 4k touch screen interactive panel whiteboard nano smart classroom blackboard
teaching nano blackboard-9
Price: 800
Troubleshooting & Maintenance: Solutions for Touch Failure & System Switching Issues
1. Touch Malfunction Diagnosis
1.1 Basic Checks
Step 1: Verify screen protector compatibility (OEM recommended)
Step 2: Check stylus battery (green LED = normal)
Step 3: Hard reboot (hold power 10s)
1.2 Advanced Diagnostics
Symptom | Possible Cause | Solution |
Dead zones | Capacitive grid damage | 25-point calibration → Replace |
Stylus works/finger fails | Palm rejection enabled | Settings → Touch → Disable "Palm Rejection" |
Intermittent touch | 2.4GHz interference | Switch to 5GHz WiFi |
1.3 Calibration Procedure
1）.Engineering mode: Hold "Vol+" + "Home" for 5s
2）.Select "25-point calibration"
3）.Tap marked points with OEM stylus
4）.Reboot after saving (≈3 mins)
2. OS Switching Failures
2.1 Error Codes
E-101: OPS not detected → Reinsert module + check 12V power
E-205: System file conflict → Use recovery USB (from manufacturer)
E-308: Timeout → Update BIOS to V2.1.5+
2.2 Data Sync Issues
Symptom: Windows files invisible in Android
Fix:
1.Confirm shared partition is NTFS
2.Check "FileBridge" service status in Android
3.Remount: adb shell mount -t ntfs /dev/sda4 /mnt/share
3. Hardware Maintenance
3.1 Routine Care
Cleaning:
Screen: Microfiber cloth daily
Vents: Compressed air weekly
Environment:
Temperature: 10℃-35℃ (auto-protection triggers beyond)
Humidity: 30%-70%RH (anti-condensation)
3.2 Parts Replacement
Component | Lifespan | Replacement Guide |
Stylus tip | 500k clicks | Twist counterclockwise → Snap new tip |
Cooling fan | 3yrs/20k hours | Professional service required |
Battery | 5yrs | Contact authorized service |
4. Software Troubleshooting
4.1 System Lag
Quick fix: Three-finger swipe down → End task
Permanent solution:
1.Safe mode (press F8 repeatedly at boot)
2.Run sfc /scannow
3.Reset virtual memory: 1.5-2× physical RAM
4.2 Driver Conflicts
Touch driver: Download latest from official support page
GPU driver: Disable Windows auto-update, use OEM drivers
5. Emergency Recovery
5.1 System Crash
1.Insert recovery USB (pre-made)
2.Press F12 for boot menu
3.Select "Quick Repair" (keeps user data)
5.2 Cloud Recovery
Requirement: Active internet connection
Steps:
1.Settings → System → Advanced recovery → Cloud reset
2.Enter device serial number
3.Download latest OS image (≈20 mins)
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