My N900 has refused to boot:
-only white Nokia logo without white LED and screen goes blank
-on charger: only white Nokia logo without white LEDs and the screen turns off, reboot loop, sometimes orange LED blinks
-flash eMMC and rootfs works, but do not help


I have tried almost everything (start with u-boot, battery replacement, cold flash, etc.)
Finally bought another N900 and swapped the screen from the "new" one to "old" (broken) N900, and everything back to normal state

So now I have two working N900(one without display).

I thought it was the motherboard, but somehow it was the fault of display(flex maybe- I will check it later) to prevent from a boot(even on RD mode).

Maybe this can help someone.

Hardly a fix more diagnoses

Probably the main ribbon, instructions to repair here.

http://talk.maemo.org/showthread.php...71#post1324171

Ok, diagnosis

I read your post before, but my symptoms were different, and I was convinced that is something wrong with mobo HW, but not screen HW...

Anyway, I'm going to buy some broken device and get main ribbon from it, becouse ribbon itself cost nearly the same as broken device

You can't remove the main ribbon from a device without damaging it.

As you can see from my images they are stuck down solid.

Also symptoms of a broken main ribbon can vary depending on which part of the ribbon is broken.

So, first I'll try to swap whole display from broken N900

Hi @mr666acdc,only for protocol,did you try with:
flasher-3.5.exe --disable-rd-mode -F RX-51_2009SE_20.2010.36-2_PR_COMBINED_MR0_ARM.bin -f
regards

did you try to change battery？

I tried flasher-3.5.exe --disable-rd-mode -F RX-51_2009SE_20.2010.36-2_PR_COMBINED_MR0_ARM.bin -f and change battery to fully charged, none of this works.
It's definitely a display fault.