Mine did the same thing,
sent then the unit and for 50 bucks they repaired it .... worth a call
this was a few years ago
If you are going for PC speakers the new logitects are worth a look IMO if looking for bang for the buck
If you are going with an amp the Polks at new egg are rediculously cheap and do a nice job mind you not in the B & W league
Take a look at this set up
2 pairs for fronts and rears
http://www.newegg.com/Product/Produc...82E16882290201
Center
http://www.newegg.com/Product/Produc...82E16882290211
Sub
http://www.newegg.com/Product/Produc...82E16882290130
The nice thing is you can give these a listen at Best Buy last time I checked
the front and rear come wall mountable out of the box but are deep.
I think this would be a way cool/Kick ass system for the PC pushed by a Yamaha head unit .... thinking epic even .... the polks bar none have the best tonal balance in the industry by a long shot at their price point IMO ..... and the 30's rock highs and mids soundly but have to lean on the sub below 140HZ/120HZ range
If you have the room the 40s up front would be cool but not wall mountable