as i have serched, there is no solution i found as yet. so i think and did the trick that i cover the lence cover of n900 with a paper. (as image shows) the black part of the lence cover.which i asume tells to n900 that camera cover is open or closed. thus my lence cover is always open for n900(but physically it is closed) but i dont know how my live focus( a software to hack red led) is gone!

another thing i found today that the back cover is related to the Memory card too( i dont know how) but there is a post that tells to n900 that "back cover is there" so thus Memory card is visible.

so can anyone do some trick for me that does opposite to that post and tells to n900 that there is no back cover?( i dont use Memory card, so would not be problem for me)

is there anyone who can make some help for me here

also some times i got "camera operation failed"

should i reflash?
please great people help me out