having big issues with my acer. i have the 750 gig wd blue scorpion hd. Sometimes it will boot up and screen just goes black, hd light stops flashing but fan and power light motherboard and cd drive seem functional yet. sometimes it wont even turn one at all. iv tried reloading windows but just freezes and blank screen returns half way through. Had 2 blue screens one is bc code a and another one is bc code 43 i think it was. iv tethered hd to my desktop and scanning it for bad sectors now. is it possible the hd has failed (blue hd light stops flashing when it locks up) or something else?? thanks for the help in advance.