60hz but not at speakers or vents ? Probably the first thing I'd do is to either swap the power adapter or put the adapter output on an O'scope to see how clean the DC is. That is an Acer 45W power supply ?
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60hz but not at speakers or vents ? Probably the first thing I'd do is to either swap the power adapter or put the adapter output on an O'scope to see how clean the DC is. That is an Acer 45W power supply ?