omnibook 4150 4 short beeps.

hi, I have an omnobook 4150 and it is acting funny. After switching it on it might run for around 30 secs and then hungs forever. After trying to switch off the power, it beeps 4 times, the ON Button goes off and on again, beeps 4 times again and the process continues. use this link to hear the beeps I get. http://www.geocities.com/marywajones/beepo.wav Please help me . I forgotit does not display anything