Aspire 4315 / 4715Z Service Guide
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.... Power-Related Symptoms Symptom / Error The system doesn't power-off. See "Power System Check" on page 89. mode. Check or do the following in sequence T Audio driver T Speaker T Mainboard T Speaker T Mainboard Power Management-Related Symptoms Symptom / Error Check or do the following in BIOS Setup Utility, then reboot system.
.... Power-Related Symptoms Symptom / Error The system doesn't power-off. See "Power System Check" on page 89. mode. Check or do the following in sequence T Audio driver T Speaker T Mainboard T Speaker T Mainboard Power Management-Related Symptoms Symptom / Error Check or do the following in BIOS Setup Utility, then reboot system.