i installed the battery tweaking an hr ago.everythng worked fyn.den i switch of n900 by holding the power button, it switches of btu after 3 seconds, it shows a dim nokia screen and auto reboots. like without the nokia hands video n anything, it just reboots. after i switch it off, it shows a dim nokia screen, then i see the loading dots and my homescreen is back...it happened several times..plz help