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Early 2011 Model: A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor

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MacBook Pro not turning on

Two months ago the system became sluggish, so I ran the hardware diagnostic tool and it gave the error 4SNS/1/C/0000008:TC0D--124. The battery was weak and would only run for 2 hours.

A few days ago , it refused to turn on. The battery is dead as the battery indicator lights blink 5 times. The light on the magsafe when connected is green.

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Here’s a good writeup on the AHT & Apple diag errors: Finding Hardware Faults: Exploring AHT & Apple Diagnostics

Its a bit cryptic here’s what you have:

4SNS - System sensor

/1/C/0000008:

T - Temp

C - CPU

0 - Optical drive

D - DC Power

These all roll up to a SMC issue with its sensors inputs. Did you have a liquid spill at some point? This will need some serious repairs! I would recommend you locate someone who has micro-soldering skills to fix your logic board.

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Gavin B zal eeuwig dankbaar zijn.
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