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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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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