The 2 usual issues beyond the monitor are:
1. Is it the Native Resolution? (google that if you are new to PC terms.)
2. Is the connection digital or analog?
Is the clarity and sharpness of the monitor affected by the power of your computer? I have an Acer H233H monitor with a very grainy image and I'm assuming that's because I have it hooked up to my old Toshiba laptop. Zat why?