First best guess is that the internal connector for the speakers got jarred out of its socket in shipping.

Second guess has to do with the fact that most laptop speakers hook up with a 3-terminal connector that shares the Common (-) lead for both sides. If the Common connection is internally broken anywhere inside the lappy, both speakers go out.

I doubt this is a software problem because Matt has already been all over the doggone thing trying to get sound from the speakers.

I also doubt that there are any "sensing" circuits at the earphone jacks. Likely only a mechanical SPST set of switch contacts wired in series for the two headphone jacks.

There is only one Power Amp that is used to drive speakers or earphones, since the earphones are working, we know that the power amp is working. Since that is the case, here is yet another reason not to think that software is the cause. It would simply not be cost effective to use software to switch at the low impedance power amp side of the thing. That would and should take place at the lower power Line level, before the power amp.

Diagnosis (from a distance): The new owner should start the Return Authorization procedure and get it over with.

There is *another* way to approach this situation. Rather than return for service, the new owner should try to get the *dealer* to simply provide a replacement. Within 30 days of purchase, this is usually something that can be done and it eliminates the downtime without the lappy.


--Mac

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