Windows 7: dell 2407 & 2005 issues??!

Hey, i just picked up a used 2407wfp, i plugged the monitor into my macbook before i bought it, worked fine, got home plugged it into my home computer and it worked fine, i rebooted the computer plugged in the second monitor (2005fwp) and now only the 2005 comes on, and the 2407 has an orange light, i unhooked the 2005 and just hooked in the 2407 and that wont work now?!? someone said it could have something to do with the hertz ??

Specs look good on monitor: Dell UltraSharp 2407WFP-HC | Dell

Can you try it again on the Mac?

When i went to go meet the guy, I brought an old powerbook, and hooked it up with the dvi cable , worked fine, so i bought it off him. is there something else i have to setup??

When you unhooked the 2005, did you connect the 2407 to the very same output? Do you have two DVIs? Try using the monitor cable on the 2005 for the 2407.

I tried both, and also i tried a dual link dvi cable, still no picture, it was working for one moment, then after the reboot and after i popped in the 2005, the 2407 died. F#$@! is this just shit luck.

Sorry, but it does sound bad. Go hunt the guy down and get your money back.

dammit, I just hooked my playstation to composite and it is working fine. dvi still no good.