Bench Signal #004 — three things from the bench, every Tuesday.
① This week's tip
MacBook Air M2 and M3 charging slowly, or only charging with the cable at a specific angle. Before touching the board, check the MagSafe pins.
Oxidation on the charging pins is one of the most common causes of erratic MagSafe behaviour — and it's invisible to the naked eye. Clean the pins with a pencil eraser. Takes two minutes. Works more often than it should.
If charging behaviour doesn't improve after cleaning, then start looking at the board.
② Prompt of the week
Use this to build a verbal intake script for your repair shop:
I run an Apple repair lab. Write a short verbal script for a technician to use when receiving a device from a customer. It should: greet the customer, confirm the reported issue, ask about prior repairs, explain that we'll complete a diagnostic before any work begins, get sign-off acknowledgement, and set a realistic expectation for turnaround time. Tone: professional, friendly, under 150 words.
Standardise what gets said at intake and you prevent most post-repair disputes before they start.
③ Resource this week
coconutBattery — coconut-flavour.com
Free Mac app that shows detailed battery state for any Mac or connected iPhone. Current capacity vs design capacity, cycle count, temperature, and charge history. More detail than System Information alone. Useful for documenting battery condition before and after a repair.
That's it for this week.
If this was useful, forward it to a colleague who'd appreciate it.
— BenchNotes