My wife's first generation MBA (running Snow Leopard) was working fine, then she put it in sleep mode. When it awoke, the keyboard and trackpad were completely unresponsive. We tried rebooting several times (had to do a hard-shutdown since we couldn't interact with it). Still dead. I was able to use screen sharing and remotely login to the MBA. Other than the keyboard and trackpad, it works fine via VNC and remote desktop. Are there any diagnostics I can perform to get a better idea of what's happening? Any other ideas? Thanks in advance.