sorry, I missed the link. Bugger. That's what it usually is.
If it's doing excactly the same thing in a different PC, I would be looking at the cable, possibly not firmly connected or damaged. Is should be just a straight VGA to VGA cable. No adaptors or anything. Your Dell just came with the onboard Inte HD graphics. Just checking that you didn't get a model with the optional AMD Radeon 63/6400 series.
I've re-read everything. It may be an incorrect EDID on the monitor itself. Windows installed the incorrect (B2230) driver
, then you manually installed the correct one (B2030). That's where the issue is.
also, are you definatelly sure you don't have the larger 22inch B2230
Anyway, try Checking VGA Cable, then open Device Manager, Monitor, Right Click SyncMaster B2030, Properties, Roll Back Driver. Keep Rolling back until it's greyed out. You should now be at the first Monitor Driver that Windows Cached. Uninstall that Monitor Driver and tick with Drivers
, Click Scan For Hardware Changes (it's the Icon under Help), It should install a Windows generic monitor driver. Update that driver with the SyncMaster B2030 driver from Samsung. If there is no drivers to roll back, just skip that stage and go to Uninstall Monitor driver with tick in Drivers. Scan for Hardware changes. Repeat until no more monitor drivers. Update to B2030 driver.
If all that doesn't work, I would download a program called MonInfo. That will show you what EDID info your monitor is sending. See if it's got the correct name.