Hello, I am having a problem with my Sony Vaio VGN-A517B What happens when i turn it on is the power/hdd/network lights come on at the front as usual and i hear a sound of the hdd spinning, After about 3-4 seconds there is a click and it turns off. It then goes into an infinite cycle of the above! It never reaches post boot up or the vaio logo. There is also a cd in the tray that i can't remove as power doesn't seem to get to the drive I contacted Sony about it and they suggested removing the battery and power lead then pressing the power button for around 20 seconds to remove any residual static! I tried this but it still refuses to boot. Sony now want £142 before they will even diagnose the problem :S I have not installed any extra hardware to the laptop!! Any advise on what the problem might be would be greatly appreciated.