A music producer in West Maredpally, aged 52, relies on a MacBook with an external drive full of project files. One day the laptop charged only when the cable was in the left-side port, and the drive on the right kept disconnecting during a session. This is a typical scenario drawn from the kind of case a repair bench sees, not a record of one particular customer. Follow it step by step to learn what you can check yourself and what the technician does.
Why does a MacBook charge on only one USB-C port?
Short answer: A port that fails to charge or hold a drive may be full of lint, may have a worn or bent contact, or may sit on a damaged port board (the small circuit board that holds the connector and links it to the logic board). Try another cable, charger and port first. If one side keeps failing, a technician needs to inspect it. Several ports may share one board.
What the owner checked first
- Another cable and charger. The producer borrowed a friend's cable and charger. The left port still charged, the right port still did not.
- Each port in turn. Moving the charger to the second port on the right made no difference, which suggested the problem was not one cable.
- A torch into the port. There was a little lint, which he removed with a wooden toothpick. Switch the Mac off before cleaning, and never use metal. The right side still failed.
- A restart. It made no difference, so software was unlikely to be the cause.
- A different drive and cable. The drive still dropped on the right and held steady on the left.
With these checks done, he sent the laptop in. Our guide to charging port cleaning explains the safe way to clear a port.
What the technician did on the bench
1. Back up first, if the Mac will start
Do not open the MacBook yourself to test the ports; the battery stays live inside until it is disconnected. Because the MacBook still powered on, the owner was asked to take a backup before sending it. Our backup before repair guide lists what to copy. A technician does not need your password to test ports.
2. Look under magnification
With the base removed and the battery disconnected for safety, the technician looked at both ports under a magnifier. On the right side, the inside of the connector showed bent contacts and slight discolouration. The cause could be a strain on the cable over time.
3. Measure with a multimeter
Set to continuity and voltage modes, a multimeter showed that the lines on the right port board did not behave as the left side did. This is a comparison against a working part, not a number to quote. It pointed to the port board rather than the main logic board.
4. Replace the port board
On some MacBooks the ports sit on a small board that can be replaced on its own. On others the connectors are soldered to the logic board, which makes the repair more detailed. Which applies depends on the model, and a technician tells you after opening it. Here, the port board was replaced.
5. The all-port test
After reassembly, the technician tested every port: charging, an external drive copying a large file without a drop, a display adapter and a USB device. Only then was the laptop returned.
Courier or doorstep for a MacBook port repair
In West Maredpally, a doorstep visit or carry-in to our MG Road, Secunderabad store works; a courier is the other option. If you send it, pack the laptop in a snug box with padding, remove accessories, and send the tracking number on WhatsApp. For owners in Hyderabad, our Apple service page for Secunderabad covers doorstep visits, including laptop repair in West Maredpally. Pack well in the monsoon too, as damp parcels can harm a laptop.
When to get help
- One port charges and another does not, even with a new cable.
- An external drive drops out when the cable is moved slightly.
- The port feels loose, or the connector looks bent.
- The charging light, battery percentage or fan behaves oddly.
Our MacBook not charging page explains how we diagnose the fault, and our Apple repair hub lists other services. If your MacBook is still under Apple's warranty or AppleCare, Apple's own service should be your first call; we repair Macs out of warranty or when the owner chooses independent repair. ₹149 doorstep visit fee, waived when you approve laptop repair with us. No Fix No Fee applies to our repairs.
A note from the LRW Engineer Team
Do not keep forcing a loose cable into a port, and do not charge through a port that gets warm or smells odd. If an external drive holds your only copy of important files, copy them elsewhere before the repair. A port that is failing can drop a drive halfway through a copy.