I have a Hp-Compaq Presario v2570us which has been running smoothly and was only down once when I had to send it for some repairs from HP as the lcd went dim.... this morning when we started it up there was one of the BLUE SCREENS and before I could read it all it restarted. Now it won't boot up....this couldn't be a worse time as we had not backed it up last night. When we power it on all we get are two beeps and nothing else it does not respond at all beyond the two beeps which are simply BEEP BEEP! HELP! PLEASE THIS IS VERY URGENT!