When I turn on my nokia N800, it starts with nokia monogram and then suddenly reboot and repeat the same until turned off after sometime. Can you please help.... I have changed the battery as well but in vain.

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Hi,

I've experienced this problem for countable times. This is not a problem with your tablet pc but a problem with the network on some sim cards (specially if it is old). You just need to wait for it until it allows you to send messages again. If this will happen for more days, I suggest you to buy a new sim card.

Hope this helps.

remove the battrey and connect it again.
Hope this helps. Please rate my response.
Thanks.
Have a good day

This was a common problem that N800's had. From what I've read, requires an lcd replacement.

Do you hear "clicking" when you press the power button? As if it registers the button but does nothing after the "click?" If not, then it sounds like the mechanical/electrical problem with the button. If you do hear clicking maybe if you simply do a battery pull it may reset what was freaking out the power button.

There is a way to reset the UI (rather than cycling the power) but it involves from shell commands:

the XTerm is in the utilities menu. Open that up and type:

/etc/init.d/mce restart
/etc/init.d/osso-systemui restart

Also in XTerm

shutdown -r now

will reset the N800.

Hope this helps,
Bill

This is an issue the N800. You have to replace the LCD.

I had the same problem with the n810. I was using a non-oem battery and the connections were a loose fit causing the battery not able to charge.
If you take the battery cover off, hold the battery firmly in place. Connect the charger and make sure battery is charging, then press the boot button. If it boots and stays on, then shuts off when you stop holding the battery. Then you probably have a loose connection or a bad battery. Also try cleaning the connector with a pencil eraser and alcohol.
I had to wedge tthe battery in place. You can find a spare battery with a desktop charger on Ebay for around $10US.

I guess you need to contact the company directly. Check the link to 'Contact Us'. You can call them up or e-mail.

Try it. Good luck...

if the lights didn't off, maybe your N800 is grounded. return it for repair.

Navigate to the site with the pic's you want, hold down the stylus on the image, and select "Save.."