My phone doesnt boot!!!help!!

Question

all the people of nokia I need your help....I need your reconmendations.....first of all....I cant turn on the phone because the phone stacks in a blank nokia logo and then turns off.....when I trye to connect in the pc nothing happens...and when I try to put the battery in to the device....it turns on by itself and restarting sevaral times.....I dont know what kind of problem I am facing...I will appreciate your help.....

Answer 1

here is what Nokia would do if you sent it in:  follow the directions and you wont have to waste your time going in or sending it in.
this will wipe your device completely, you would loose your data anyway.
HERE FOR DIRECTIONS TO FLASH YOUR N900
you will need to be sure that you have a non-64 bit pc.
1. Download the Flasher
2. Download the latest firmware image for your N900  (you will need your IMEI of the device)
3. when you save the global variant of the firmware to the "flasher-3.5" folder, save it as "pr1.2.bin"
4.  When you save the vanilla file of the firmware to the "flasher-3.5" folder, save it as "vanilla.bin"
5.  Turn your phone off
6.  launch the flasher-3.5 program
7.  type this command:   flasher-3.5.exe -F pr1.2.bin -f
it will then scroll a bunch of jiberish and then say it is looking for a unit.
8.  with the phone still off, hold slide the kb open and hold the "U" button while you connect the usb cable to the phone.  continue holding the "U" until you see the faint "NOKIA" logo and/or the USB connection symbol in the top right.  The flasher will find the device and automatically flash the unit to the original rom
9.  after about 1.5 minutes, it will be complete.  DO NOT DISCONNECT YOUR UNIT!
10.  type this command:   flasher-3.5.exe -F vanilla.bin -f -R
11.  now it should reflash the device and wipe the emmc clean of EVERYTHING.  after it reboots, you can disconnect it.
before you load any software into the device via restoring from your backup, be sure to try the backlight settings again and see if it is still having the issue.
if the issue is gone then there was some software that you had installed that was affecting it.   if the issue is still there, then have your device replaced.
if the issue is resolved, then a couple of things.
1.  depending on how many applications you had installed, you can go back and install them one at a time and re-sync your contacts/calendar separately.  or you can do a restore from your back up.
when you do the restore, be sure that you look at all the applications in the list that it is going re-download and install before you allow it to, to be sure they are the only applications you want.
2.  mark this post as solution and post a kudos to any post above that has helped you in the effort to resolve your issues as a happy thanks to their efforts in giving you free support for your device that NOKIA did not give you.