Aspire 4315 / 4715Z Service Guide
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... Mainboard T See "Check the Battery Pack" on page 34. T DIMM T Mainboard Speaker-Related Symptoms Symptom / Error In Windows, multimedia programs, no sound. 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 sequence Memory count (size) appears... power switch for more than 4 seconds. Power-Related Symptoms Symptom / Error The system doesn't power-off. Internal speakers make noise or emit no sound comes from actual size. T Keyboard (if control is damaged.
... Mainboard T See "Check the Battery Pack" on page 34. T DIMM T Mainboard Speaker-Related Symptoms Symptom / Error In Windows, multimedia programs, no sound. 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 sequence Memory count (size) appears... power switch for more than 4 seconds. Power-Related Symptoms Symptom / Error The system doesn't power-off. Internal speakers make noise or emit no sound comes from actual size. T Keyboard (if control is damaged.