I have a macbook that is a year and 1/2 old. i went to turn it on today and the screen stayed black and it makes loud beeps. why is this happening?

The power contacts are probably damaged from electrocution. Check the moisture sensor.

Tones before the Happy Mac or Apple logo means that during the start up process (when Mac checks Hardware) it found something wrong. I have seen this with bad memory, and crashed Hard Drives.
Insert the original CD that come with the machine and hold down the C key and then hit the power button.
Then try to reinstall operating system.
All your data will be there. You may need to enter program serial numbers again but Music. Docs etc should still be there.
Strong believer in TimeMachine. this free software from Apple has saved my life several times.

dont really know,would you be interested in selling it lik that?

It sounds like it's toast.

This happened to me and I was able to fix it. I cracked it opened and found a bad capacitor, bought a replacement at Radio Shack and I'm back in business. Actually using it right now to post this.
-Jon

You will need a new monitor screen. I have had two screens go on me recently and what you describes normally happens

It could be a bad backlight bulb.

1. power-off your computer. unplug video and power cables. remove your video card hardware from its slot and plug it back in. put the video and power cables back. power on your computer. try this up to 3 times until your system is back to normal. it will be best if it works your first try. if it doesn't consider changing you video card.

My computer used to do the same thing, I found out it was my motherboard / logic board and a hardrive combination. end cost $1500..so i bought a new Laptop. Go and get those things tested.