Just be aware: screen "burn in" does happen on LCDs. All LCDs can suffer this. Though as you noticed, it is reversible, unlike (practically) in CRTs. But burnin from one day of a static image? That's unusual I think.
Sorry, it depends on the router's configuration pages.
Here's a partial list of things to look for:
For my D-Link DI-524:
SSID Broadcast (select the DISABLED button)
Security (select the WPA option from the pulldown menu)
Sorry, I didn't see your posts until now.
The answer to why your DVI was showing only 1280x1024 max resolution was because your video driver was querying the LCD panel for its maximum resolution, and you have the (default) checkbox...