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| Raspberry Pi runs fine, but the USB ports have no 5V power Repair | |
|---|---|
| Device | Raspberry Pi |
| Affects part(s) | |
| Needs equipment | |
| Difficulty | |
| Type | |
Problem description
Raspberry Pi runs fine, but the USB ports have no 5V power.
- Pi 1 (B+ only)
- Pi 2 (all)
- Pi 3 (B only)
Symptoms
- Raspberry Pi runs fine.
- USB ports have no 5V power.
Solution
his problem may be caused by faulty ferrite beads next to the LAN9514 chip.
Remove all power from the Pi and measure the resistance of the ferrite beads (especially the one highlighted red in the image). The resistance should be below 1 Ohm.
Broken ferrite beads need to be replaced. The part number of the original part is BLM18AG601.
If the original part is not available, the ferrite bead next to the WiFi chip on a Raspberry Pi Zero W can be used as a replacement. It should also be possible to bridge broken ferrite beads with a wire, although doing so will increase electromagnetic interference.
Also see LAN9514 (Raspberry Pi).