Bung:andrewNZ: I'll give you an example of why I don't think in store staff "experts" should be troubleshooting issues.
A long time ago, my family purchased a good VCR, for a fairly hefty price. The device developed tracking problems, and so we took it back.
The "technician" in the shop tinkered with it and made it work, said it wasn't a tracking problem, and it was fixed. We took it home, and the problem came back a few months later, so we took it back again. The "technician" in the shop tinkered with it and made it work, said it wasn't a tracking problem, and it was fixed...
This went on forever, the problem was never solved, and the VCR was eventually dumped.
Talking to a professional some years later, we discovered that there was a known issue with the tracking circuit in those devices that would have been fixed if the guy in the shop just asked the manufacturer, or any expert.
Good story but it ignores the fact that "known issues" can take forever to acknowledged by the manufacturer.
I have taken faulty items back with evidence that the problem was identified in other markets and the service agents here still pretend surprise.
In this case, the known issue was readily acknowledged by the manufacturer.
Times have changed, companies sell a LOT more devices (which usually aren't repairable) at a much lower margin and so they are less inclined to throw money at a problem they don't have to. Also you have places like Brightpoint, who I'm pretty sure are/were defrauding customers, but that's another story.
I still trust a professional more than sales staff.