i have an amd dual core processor on an asus A8N sli premium motherboard running 2 gigs of memory.. i installed my video card last week and things worked great then i installed a huppauge tv tuner card and my computer started acting funny.. when i would wake up in the morning the light on my monitor would just blink at me like it was in stand by mode.. and i would have to completly shut down the computer and restart it two seconds later.. then it would work fine.. so i shut down my computer before i went to work on sunday and when i got home 12 hours later i pushed the power button and the computer boots up normally on its own but the monitor is just black.. and the moniter light just blinks at me.. i thought it might be my video card so i pulled it out and put it in another computer it it worked fine.. so i put it back in my computer and reomved the tv tuner card.. it still wont give me any response through my monitor.. anayone have any ideas???