Alicia, a long beep then two short beeps and has a blank screen on HP, I believe this means connection to or video card failure. If you can try reseating the ram and unplug video card and plug back in. Video card may be on its way out.
I hope this helped you out, if so let me know by pressing the helpful button. check attached links for more info.
http://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/BLANK-SCREEN-with-3-beep-1-long-2-short/td-p/29759
http://h30434.www3.hp.com/t5/Notebook-Boot-and-Lockup/Why-does-my-Pavilion-dv6000-beep-3-times-at-start-up-and/td-p/730507