Hi Barbieqgard - It would be unusual for installation of the wrong type of RAM to cause the syptoms you describe.....usually, if the RAM strip is not compatible or is installed incorrectly your tower will beep out an error code.
It is more likely that you have somehow disturbed the cable connection from your monitor to your tower......Please check all cabling from monitor to tower and ensure they are firmly in place, at both ends.
please help! i recently added ram to my laptop and after installing the two new "1gig 200pin ddr2 sodimm 128mx64 pc2-4200" into their respective slots, i could no longer get the screen to turn on. i hear the machine sound of turning on but my screen stays completely dark. is there something i could have done very wrong? i am definitely a newbie but i did use a wrist strap for precaution. i don't think i put in the wrong kind of ram because crucial did it's own detection for the right replacements before i ordered them. also, when i tried to put the old ram back in, the screen still stays dark(off); so i'm worried.
any advise would be truly appreciated.