If you've already checked all your cable connections, to make sure they're tight, check your windows settings: Go to Start>rt click My computer, choose properties, settings on performance, and choose adjust for best performance. (This will uncheck the shadow options for menus and icons, etc.) Take a look at your desktop. Is that better? If so, you might want to do some maintenance to improve your system performance by clicking here.
If no improvement, download or open the .pdf user guide for your monitor by clicking here
. See pages 22, 17, and 12. They will show you how to use the auto button on the monitor to reset to optimal settings, to adjust the refresh rate (control panel>display>settings>advanced) to its optimum. (Normally, higher refresh rates indicate clearer pictures, but some LCD monitors seem to run better at a default 60hz rate. Check your Gateway documentation for your graphics adapter to see what it supports, (your monitor supports 60, 70, & 75), or experiment.)
If adjusting settings doesn't improve anything, you could search for updated drivers for your graphics adapter. Go to windows update and see if you're offered hardware updates, or search Gateway support for newer drivers.
Not many options left. See here
.You could take it in to a local tech and have them take a quick look.( or try it on another computer).
If it's on its way to a sad end, I'm sorry. We have the same monitor at home and it's been great. Aside from a scratch someone put in it years back, it provides very clear resolution.