My 3505 worked great out of the box with no break-in period. It doesn't make sense to need a break-in or warmup period. I think the problem will persist. You can call the toll-free 800 number for Toshiba and ask them what to do. They may have you try reloading the drivers and see if that works. If not, they will probably have you take it back to the store. I think loose wires or anything hardware related should be fixed by an authorized service tech and should be under warranty.
Wish you luck so you can enjoy your new PC.