My PS3 wont turn on it just flashes a yellow light then red light that beeps cant get disc out

SOURCE: From standby PS3 wont turn on.

that sounds like your main power supply unit

SOURCE: when i turn ps3 on red light turns green then

Yes, what you have here is called the Yellow Light of Death, or (YLOD) for short. On PS3's, getting a YLOD is a 3% chance, while the XBOX360 gets a higher chance for the RROD.

I'm not sure exactly how to fix it myself, but hopefully this will help you.

http://www.youtube.com/watch?v=4_Ic1_TY-GU

SOURCE: ps3 wont stay on

charge it red light turning of and beeping is meaning its dead

SOURCE: my ps3 wont turn on. light turns green, flashes

This is known as the yellow light of death.(ylod) It's about 150 bucks to have it serviced unless it's still under warranty.It says in the manual it is an overheating issue.
As for your problem, call customer support at 1-800-345-SONY

SOURCE: WONT START UP

This is known as the yellow light of death(ironic i know). This is caused when the unit overheats causing solder on the board to melt and bridge(connect). Once this happens it shorts out the board giving you the error you have now. Contact Sony and see if the unit is still under warranty.

If the unit is not under warranty go to www.wiredextreme.com. We are a console repair company based in Texas, and we can get your console up and running again. All of our repairs come with a 90 day warranty that covers the whole console, not just what we repaired. We also offer extended warranties up to 4 years at additional cost. If you have any other questions/concerns feel free to email [email protected] or call toll free 1-888-389-3038.