Fujitsu Siemens Amilo Pro V2055 laptop power on...

Question

Fujitsu Siemens Amilo Pro V2055 laptop. I have a V2055 that won't power on. It switched off one night and won't switch back on. Battery is good and charge light works when connected to the power pack but nothing happens when you press 'on'.
If you hold the button down, the green power light flashes and there is a quiet ticking sound from inside the laptop. Any ideas??