Fully full. I had just charged it. It's completely repeatable: every time I shut down, it will be 5-30 minutes before I can power it back on. Or I can pull the battery and wait a few minutes.

Datapath I seem to have the same problem as you do.

I've just received my n800. I switched it on for the first time and as soon as I switched it off the machine went dead. After reading this forum I took the battery out wait for at least 30 min to 60 min than it works. Every time I switch off it goes dead. I am afraid the pins of the battery will be damaged while taking the battery out and inserting back. Anyone have any idea for this problem ?

Am experiencing the exact same problem even after upgrading to OS2008. Wonder if there was a bad batch?

Ordered mine from tigerdirect.com end of December. What number could we use to compare if they are from the same batch or not?

i just got one from tiger direct and upgraded to 2008...

it seemed like it wouldn't turn on after i upgraded, but i found that you had to hold the on button and wait for the LED around the arrow key pad to light up fully and then it would boot...

but if i held it for too long the light would go out and it wouldn't turn on... sort of strange... look to see whether the blue light goes on when you think it is dead...

Yeah, I noticed the blue led would light up when it would boot but when it won't boot the leds won't light up.

It wouldn't turn on this morning so I plugged it in to let it charge for 2-3 hrs. Tried turning it on about an hour ago and it wouldn't come on. Took the battery out and went back to working. I just now put the battery back in, it booted up, I let it connect to the wifi and then shut it down. I did notice before shutting down that it said that the battery was still low.

Now it won't turn back on. Am also noticing that when I plug it into power the charging indicator doesn't come on either. Don't remember if the indicator came on this morning or not. Removed the battery for a few seconds and put it back in and then tried plugging it in and the charging indicator still won't come on.

I've taken the battery back out and set the unit aside again. Will put the battery back in after 30 minutes or so and plug it into the charger to see if the indicator comes on before trying to power the unit back on again.

Just found the following on another thread:

Took out the included external 256MB SD card, put the battery back in, and plugged it in. Was able to turn it on/off several times while plugged in. I'll let it charge for a couple hours and then see if I have any issues turning it on/off with the SD card removed.

I got the n800 at the beginning of january. I took it to work and my colleague, who has one, helped me flash it to OS2008. we used a PC. we plugged it in the to the USB, ran the flasher, turned it off and it would not turn back on. confused, we moved onto something else and i put it on the charger. I noticed after about 30 mins that it started up again. so we put it on the flasher and flashed it to OS2008. i turned it off and it would not turn back on. i then discovered, like you, that if it is connected to the charger after about 10-30 mins will re-active and then it can be turned on. but if i turn it off, it wont turn or power on until its put back on the charger.

today i decided to down-grade to OS2007 to see if that would work. I used the 770Flasher app for Mac OSX. I did this just now at work and i dont have the power adaptor here so I knew it was a risk. It was powered on, connected to the USB and i ran the flasher.

The flasher reported some shared library errors and i couldnt make out if these were with respect to the flasher app or the n800. after the errors i was able to select the firmware OS2007 file. when i hit OK, the flasher told me to disconnect the n800 and power down. I did this, and reconnected it to the computer. nothing happened. then i thought, maybe it needs to be powered back on. so thinking it wouldnt power on, I powered it on, and it turned on!

the flasher ran, showed some info about the existing system and then reported an error. i wish i had written all this down or taken screenshots but alas, i didnt. so i disconnected the n800. quit the flasher and decided to turn it off and try turning it back on...

... IT WORKED!

and now, in the last hour i have turned it off and back on successfully about 5 times. I'll try it again....

... of course ... this time it didnt turn on.

but wait... lets try the process again...

... now it turns on and off again ok.

i was able to capture the output of the flasher:

Nokia 770 Flasher for Mac OS X
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
(c) Andrew Flegg 2005.
http://www.bleb.org/software/770/ Released under the Artistic Licence.

dyld: shared cached file is corrupt: /var/db/dyld/dyld_shared_cache_ppc
dyld: shared cached file is corrupt: /var/db/dyld/dyld_shared_cache_ppc
dyld: shared cached file is corrupt: /var/db/dyld/dyld_shared_cache_ppc
dyld: shared cached file is corrupt: /var/db/dyld/dyld_shared_cache_ppc
flasher v0.8.1 (Jun 8 2006)

Suitable USB device not found, waiting
Error opening USB device: Unknown error: -1
SW version in image: RX-34_2007SE_4.2007.38-2_PR_MR0
Image 'kernel', size 1317632 bytes
Version 2.6.18-200738osso1
Image 'initfs', size 1704576 bytes
Version 0.94-17
Image 'rootfs', size 87162880 bytes
Version RX-34_2007SE_4.2007.38-2_PR_MR0
Image '2nd', size 8064 bytes
Valid for RX-34: 1301, 1302, 1501, 1502, 1503, 1504, 1601, 1602
Version 1.1.6-5
Image 'xloader', size 9088 bytes
Valid for RX-34: 1301, 1302, 1501, 1502, 1503, 1504, 1601, 1602
Version 1.1.6-5
Image 'secondary', size 95872 bytes
Valid for RX-34: 1301, 1302, 1501, 1502, 1503, 1504, 1601, 1602
Version 1.1.6-5
USB device found found at bus 005, device address 005-0421-0105-02-00
dyld: shared cached file is corrupt: /var/db/dyld/dyld_shared_cache_ppc

------------

this seems to be a problem with the flasher. anyway, now at least i can turn it on and off and it will mostly always work. much better than before.

i dont know if this "fixed" the problem or if it was circumstantial. perhaps there is something odd about the USB port - like maybe it gets put into a "mode" or something that prevents the n800 from switching on?

i find it hard to believe its a hardware problem. any word from nokia on this?

brett

So after removing the SD card, plugging it into power, and turning it on/off several times I just left it off to charge. About 1-2 hrs later I come back and the screen shows "charging". I unplug it and then attempt to turn it on...nothing. I then plug it back in and the "charging" doesn't come back up and I can't turn it on.

I took the battery out and left it out for about 30 minutes and then just put the battery back in and plugged it in...nothing. Attempted to turn it on.... nothing. Just took the battery back out and will try it again in another 30 minutes.

I'm having the same issue with my N800. Out of the box, I charged it and it showed "fully charged." When I try to turn on w/ the power key nothing happens. I sent it to Nokia (thinking that it was a charging or hardware issue). They reflashed the OS (OS2007) and sent it back. It turned on once, then wouldn't turn on again.

If I plug it into the charger it springs to life. At this point I can press the power button.

I'm trying now to remove the SD card ( supplied card) and reboot a couple of times.

OK, it appears that removing the nokia SD card, plugging into charger, then doing a few reboots has solved the problem. I didn't have the little metal "holder" on the SD card so perhaps it was moving around and shorting out.

My N800 won't start by just pressing the power button, though. Like some other user mentioned I have to double-tap the home key to get the blue light to come on.. then it will power up using the power button.

So I was wrong, removing the SD card did not fix the start-up issue. After powering down it would not restart unless I plugged it into the charger.