Right, I have taken the front panel off the machine, and looking past the blue power button on the front, can be clearly seen a backup capacitor, it is right next to where the BMP plugs in, I have managed to photograph it, I have also marked a square round the battery in the second picture where it is on the board, under the white panel, you can just see the bottom of it, this must be the culprit to the problem, my next problem is reaching it to find out what it is and if it can be replaced.