Looking up the HP a1740n on their website, I find this page of specs: HP a1740n Spec List


Assuming that's what you have, I'm guessing your problem is that it only has an integrated graphics chipset. I'm willing to bet if you put in a dedicated graphics card you'd have no problems.


Here's a ATI Radeon chipset that would probably work and is only $15 after a mail-in rebate:http://www.newegg.com/Product/Product.aspx?Item=N82E16814127544. Or here's another GeForce chipset that's the same price after rebate:http://www.newegg.com/Product/Product.aspx?Item=N82E16814130536.


Otherwise if you feel it might be time for a new computer, just about any current computer (perhaps excluding some netbooks) should have no trouble with 1080p.