Sony Vaio CS Series won't start up

I've had a Sony Vaio Cs Series for approximately one year now and this is the first time i've had problems with it. last night i went to bed an it was working perfectly fine. when i work up the computer was off and inop. when i hit the power button the light on the front turns blue the changes to white. also the green power light comes on for a second. first i checked the AC adapter and the light in the power box was on. then i unplugged the power cord and plugged it back in and the effect light on the front shined green for a second, indicating it recognized the cord. i removed te battery and plugged in the power chord and still it does not turn on. my thoughts are the laptop will turn on if a fully charged battery is placed into it but the battery will eventually drain and never charge. what could be the problem? any help?