have been using the n900 for at least 6 months with no problems

a couple of days ago the backlight starts coming on by itself
even if the phone was locked it would come on and unlock itself

for the following...

Eye widget informs me that the accelerometer is working fine
and accdisplay also shows everything good


Now the phone (when turned) does not go into portrait mode for the phone mode

even if i manually open the phone app it does not change to portrait AT ALL


recently i found out that the phone would not unlock when the keyboard was opened
(it used to do it)

and also (not that im complaining) the phone does not reset when i remove the battery from the device

(the phone does not revert to the reseting of the date time and regional settings)

i tried to reflash -- no change *
i downgraded --- no change *
i reflashed to current after the downgrade -- no change *


* throughout all these the browser bookmarks and messages and contacts were not erased


Please help me fix these