 Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au

2010-08-05
4. Verify if the customer power
adapter have stuck or bent
pins on the MagSafe connector
end.
5. Verify if the cable or duckhead
have visible damage.
6. Verify that LED on MagSafe
connector is displaying both
green (if battery charged) and
orange (when charging).
Noise / Hum / Vibration
Yes Replace power adapter. P15
No Go to step 5
Yes Replace cable or duckhead. P16
No Go to step 6
Yes Verify adapter with knowngood
unit and customer unit
and troubleshoot source of
error
No Replace power adapter. P03
Unlikely cause: RAM, display assembly, top case, camera, microphone, battery
Quick Check
Symptom Quick Check
Noise / Hum / Vibration
Computer or AC adapter emits a
noise or vibration.
Deep Dive
1. Verify and reproduce the source of the noise from
the computer / adapter with the customer.
2. If the AC adapter is the source of the noise
disconnect and try a known-good adapter. (A
small amount of hum or vibration is normal with
AC adapters.)
Check Result Action Code
1. Verify if the use of a knowngood
AC adapter eliminates
the noise/vibration.
2. Verify if the noise is heard
through the speakers and / or
connected headphones.
Yes Replace AC adapter. P04
No Go to step 2
Yes Go to step 3
No Go to step 4
MacBook Pro (15-inch, Mid 2010) Symptom Charts — Startup and Power Issues 46