Question

No sound on my computer and the speaker icon, at the bottom of the screen, has a red cross (as if there are no speakers installed)

Answer 1

the only other revelation is that the 10-inch PlayBook features a much larger 7250mAh lithium polymer battery.  a larger battery will take up more space. but the tablet still looks clear and simple, this is good setting of little components. you see the battery, the processor, the <a href="http://product.xindabest.com/"alt="Flexible Printed Circuit">FPC</a> circuit and other cables very clearly.