idk what happened. all i know is i was trying to overclock the ram and when the computer restarted it went a completely black screen with nothing but my mouse cursor and now everytime after that i dont get anything when i turn it on, not even the BIOS screen. but if i take out the cmos battery itll let me get the BIOS screen and allow me to tweak BIOS, but that its. if i tweak it just goes to a black screen again. if i just let try to start up it brings up a screen that says something like check sum error and asks me to choose a bios or cmos profile, whatever it is it still dont fix anything. so any ideas? ive tryd fixing it myself for the past week with no success i need my computer back :-( im sad and lonely without it. thansk in advance to all who help.