I tried to uninstalled Linux Kernel for power user via app manager but I couldnt uninstall it then I rebot my n900 and is not booting, now everytime i try to Turn on, charge, or plug usb it restarts several times... even i cant hard reset it via flasher

PROBLEM SOLVED
Uh thanks for Allah the problem solved without loosing any DATA
I really didn't believe that my device will work again

thanks to everyone helped me in maemo talk

here are the steps (I used Ubuntu):
1- charge battery via another device
2- install flasher and download firmware
3- in terminal type

Code:

sudo flasher-3.5 -F RX-51_2009SE_20.2010.36-2.003_PR_COMBINED_003_ARM.bin --flash-only=kernel -f -R

(RX-51_2009SE_20.2010.36-2.003_PR_COMBINED_003_ARM.bin) is the name of firmware and maybe yours is differ)
and (--flash-only=kernel) won't reset any data it will only reset the kernel
4- plug USB to computer and N900 (but let N900 without battery)
5- press and hold "u" and put the battery to N900 then it will say
Flashing kernel... done.
and N900 will boot successfully


then enjoy..

I hava got help from this URL:

http://talk.maemo.org/showthread.php...541#post745541

and others that are already in below posts