Is the power light flickering?If it is then your power card is faulty certain capacitors will have blown.Is the power light steady?If it is,then with the power on press and hold the right and left navigation buttons turn off the power still holding in the buttons turn power back on continue to hold in buttons until green circle light comes on.release buttons and press select green light will spin anti clockwise,leave for 10mins after stopping and turn on box with remote.Good luck.Please note this process erases the hard drive.
malcolm
December 2010