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| How to Repair iPad Pro 10.5 not charging or not detected by pc | |
|---|---|
| Device | IPad Pro 10.5 |
| Affects part(s) | Logic Board |
| Needs equipment | Soldering Iron, Hot Air Station, Reballing Stencil |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
NOTE: USB IC (U3500) Tristar should match for best compatibility and is compatible with iPhone 7 / 7 Plus (610A3B)
Problem description
iPad Pro 10.5” does not charge and is not detected when connected to a computer. The device may show no charging icon, no USB recognition sound on PC, and no data communication.
Replacing the cable and charging brick does not resolve the issue.
In most cases, the fault is related to the U3500 (Tristar) USB controller IC.
Symptoms
- iPad does not charge
- No charging icon
- PC does not detect device
- No USB recognition sound
- New cable and adapter do not fix issue
- Device may still power on if battery has charge
Solution
Diagnostic Steps
1. Check Current Consumption
- Connect device to DC power supply
- Press power button
- Verify consumption is below 100 mA at initial click
Low or abnormal consumption supports USB controller fault.
2. Perform Dock Test
- Replace charge port with known-good dock flex
- Test charging and PC detection
If charging and detection still fail → dock is not the issue.
3. Confirm U3500 Fault
If:
- Consumption behavior is abnormal
- Dock test passes
- No PC detection
- No charging negotiation
Proceed to Tristar replacement.
Repair Steps
- Disconnect battery
- Remove logic board
- Remove protective armour/shield covering U3500
- Apply flux
- Remove faulty U3500 with controlled hot air
- Clean pads carefully
- Install known-good U3500
- Inspect solder joints under microscope
- Reassemble device
- Test:
- Charging function
- PC detection