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Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

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does not power up

does not power up. changed power supply and changed bios battery. result is a blinking led1 on the motherboard. bios battery was at 2.87 volts. do not know how to test power supply. any clues?

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1 Answer

How dusty was the system when you first opened it up? Did you check the GPU MXM board?

A common issue in this series is the GPU board fails and depending on how it fails it can short out causing your single diagnostic LED to blink.

Are you a hard user of the system? Running heavy graphics like large photo or video editing, video rendering or gaming? This system series can’t handle most of this.

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