Hello...
Well, my cel stopped.

(Start, but is in the nokia logo and off [not even in the balls]).
I tried to apply some ROM in it,
but does not go into flash mode.
I tried pressing and holding the "U"after
placing the cable, but the symbol does not appear
the usb. Nokia screen appears normal, then
off and she appears again. I asked to a friend
n900 also has a carrying my drums
To know if it was because he was just born, and nothing.
Does anyone know why? Or is there another way
to put in flash mode.

Hug!

Make sure that your battery is full and can you tell us that are you using windows 64-bits

My only suggestion is to try to take out battery, SIM card and microSD card (if you have one), wait 30 seconds and then put everything back in, carefully.

Shardul,
I've tried to
Windows 7 and 64bit
Windows Vista 32bit.

The battery is fully charged.
(I'm carrying with an external charger,
for, as it is restarting when put to
charging, the battery does not charge).

Xagoln,
not understand. The procedure I am doing without the SIM card and without
the memory card.

Thanks for the quick responses.

I was also having the same problem that your are have now,But even i put my n900 for charging and then i connect my n900 to usb and i was able to flash.So, the point is double or triple check it because flahing doesn't work if battery is low then half

Let me get this straight ...
You're asking to carry him to as much as possible?

I am Brazilian, my English is not very good, I hope you understand.

Until the green light appears

Right, like I said, I'm using an external charger (those charging the battery outside the phone). Because when I put it to charge it is restarting, enters the screen from Nokia, and restarts, going back to her. Give it does not load. Staying in the loop. I'll wait until the maximum load and try. If that fails, you have another alternative?

i have the same problem already have a charged battery, used windows xp and seven i also used my imac g5 and no luck it all started when i tried to erase nitdroid this was not my first time reflashing either. some one please help us !

When powered off and in charging mode, the N900 actually boots linux (only bare essentials).

But the small USB icon seems to appear before that time, so I don't think a software config error can be the problem.

Take a look at these threads from other people who had similar problems and solved them:

http://sumoudou.org/0/6.html
http://talk.maemo.org/archive/index.php/t-68272.html

You don't even need to switch the N900 on to re-flash, it seems.