Hi all, I have a 1520 which when connected via the mains cable shows an icon in the systems tray which looks like a lead with a blue flash through it, when the cursor is placed over it it shows "battery charging" and a percentage left; however that percentage decreases rather than increasing and finally it runs out of power and closes down as if it has actually been running off the battery and not mains. If I unplug the mains cable the icon reverts back to the battery symbol and the screen goes a little duller so I assume that it is actually drawing some power from the A.C. cable. When I shut down and leave the cable plugged in it charges the battery up again so the cable must be working? . . . I am stumped

any suggestions please?