I just got my N810 and am having the same issue. I fully charged the battery until I got the 'disconnect the charger' message. I then pulled the charger out and thereafter was not able to power-on the device (by pushing the power button). I then reconnected the AC charger and no change the N810 is still dead (ie. black screen).

After reading this thread I found that the only way I can get the N810 to power-up is by pulling the battery out and waiting ~2 hours. After that amount of time I am then able to power the device up. I think atleta's earlier post about the RTC battery having to drain charge seems to have merit.

After doing this a couple of times (what a PAIN!)

I did notice that the time was about 1.5 to 2 hours after the last time I powered it off.

One question I have...when the N810 is dead and I plug the AC adapter in I do not see any change? Is this what others are seeing? It is unclear to me as the N800 devices seem to respond to the charger?

Yes, when the device charges, it actually boots into a special charging mode. It technically has to be 'on' to charge even when it's 'off' (if you see what I mean). When the 810 is in a state where it can't turn on, it can't even charge.

I have initiated proceedings to return mine to Nokia.

2.2007.50-2/4g/4g/int flash boot N800 from buy.com
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NO new info, I guess, just an update. Read only if you bored.....

My previous problem with the boot up, running 2007.26-8 can always solve with pluggin in the tablet, and I thought it is a problem with both software and hardware. Software, messed up the system requiring a hard reboot or the "sleep" issue. Hardware, the faulty switch, charger, battery etc.

I flashed my unit to 2008OS and has been running fine without any incident for 3 days, no power on-off problems and I thought, gee, I "sloved" the problem.

This morning, I installed mplayer using "test Maemo extra", after installed, I turned the "test Maemo extra" off, and the unit cannot refresh on repository, i.e., app manager hanged upon refresh. I have no choice, but to turn the unit off...............well, it almost never come on again, I used almost every tricks I know, it wont come back. I finally put the battery back in again, for a zillion time and plug it in for a longer period, 3-5 mins, and the unit suddenly spring back to life. Any new info? I guess not, but to reinforce my prev notion, that a software mess up, requiring some hard reboot will trigger the on-off problem.

One more new thought, circling around the battery, I still think battery/charger is a factor. And the battery indicator maybe at fault too, i.e., the battery indicator may show 2 squares, (50%), but infact it is bottom so the iT cannot power on by self, requiring a charge. I know, it is my guess. Is there any other way to check the battery level, other than the built-in? Linux gurus, where are you?


bun

Yepp. But if you're patient enough (which usually means less than half an hour) it will eventually start charging. Actually the devices behaves as if the battery was totally empty. If you read the user guide then you'll see that this is how it goes with a totally empty battery. First it won't be able to boot into this charging mode not having enough charge left. I guess in that case it does use some simple (and slow) charging electronics to give some initial charge to the battery.

I contacted NokiaCare about this problem and they told me that they were not aware of it. All of you should also mail them so that they notice it. Here is the link for the reporting form:

I also opened a bug here: https://bugs.maemo.org/show_bug.cgi?id=2707 . Please take some time to confirm and vote for it.

Like many others, I purchased my N800 from Buy.com. I received it on a Friday and requested a RMA on Saturday (after fighting with the crazy on/off problem for only 24 hours). I shipped it back to Buy.com on the following Monday. After that, it took about 2 weeks to get a replacement [3 days shipping back to Buy.com, about 9 days for them to notify that they had indeed received the item and 4 more days to get the replacement shipped to my home], again this was directly from Buy.com not from Nokia. As I noted in my previous message, the replacement has worked perfectly since I received. It turns on everytime I push the power button. I wish you good luck in fixing your problem (seeing as how both of my N800 had the exact same software, I just can't believe it's a software issue).

I think there is bug report already for this, https://bugs.maemo.org/show_bug.cgi?id=2673

Rich

Well, I'm done! I'm sending my unit back today. I have not found an easy way to get the N810 to power-up once it has 'bricked'. If I keep it always in a power-on state (or standby) it seems to work fine. But I like to mess around with new apps and once I lock the device up I'm stuck waiting for 3 hours...ERRR!

I called Nokia yesterday and they also acted like they had never heard of this issue. Mine is also a Buy.com purchase so I am a bit concerned about returning it to them??? I might just get a nother defective one?

Has anyone gone the Nokia return route? How long did it take?

I tend to think (or hope ) the same. However you don't have to play with the battery or connect the charger multiple times. Just plug it in and wait. It'll boot up. I don't think that removing the battery for short periods or connecting and then disconnecting the charger plays any role here.

It doesn't seem so. But I tested with multiple chargers and batteries. I tried it with another charger of the same type that I got for my 6120. I also tried another original Nokia BP-4L battery that a friend of mine uses in his e90. I also tried my battery in his e90. His e90 worked with both mine n810 didn't boot with either. It doesn't matter which charger I use (tried several ones) while they all charge my other phones.

Well, it could be but it doesn't seem so. I'm able to use the device when it shows that the battery is almost empty and it won't accidentally switch off. We actually can't turn it on with full batteries and that would indicate that the power indicator has another problem, i.e. it measures the full battery having a too low charge. While removing the battery for a few hours 'solves' the problem so you can boot with the very same charge level just by totally cleaning all internal state.

Yepp, take a DMM (digital multimeter). But as you can see that is not the problem. Please confirm this bug in the maemo bug database. Your case seems to be quite interesting and may help to convince the developers that there is a software bug involved. https://bugs.maemo.org/show_bug.cgi?id=2707

I'm very angry with them. They act as if they didn't know because _as an organixation_ they dont know about it. But they don't know about it because the CustomerDontCare doesn't do anything about te reports. I mailed Jane and Sanyi (that's a Hungarian name ) you talked to Joe. I filed a bug that Kimo (Finnish name) ignored as a hardware issue, someone else mailed Bill. But _none_ of them recorded the fact in any system. The hungarian dontcare line told me that they don't know about it because the n810 is not sold in Hungary. BTW it is sold in the EU, but never mind, the prob,em is that they don't have a defect database. At least that's what the dontcare guy replied to me. Only the service point (repair shop) has one. That's a joke. As it is a joke that they don't have a world wide warranty for a mobile device. Guess what, people carry mobile devices all over the world. Even I can check through the internet using the WLAN ID if the device has a valid warranty. The device doesn't get repaired it gets replaced. So what's the difference? I'm totally disapointed with Nokia.

Yes I have read the terms of warranty and purchased in the US despite this but still it's an unfair practice. I think they use it for controlling the prices. It's the same trick as the DVD region code.

Sure bot not too probable. Anyone can have a defective one as they don't know about the bug and have not tested the devices for this bug. Actually mine is from Walmart.

I checked it. You have to send it back to their repair centre (that's in Alabama somewhere) so I guess it takes 3-5 days. Then the repair takes 7-10 days and then they ship it back (another 3-5 days). So it's 13-20 business days altogether which means 3-4 weeks. Now I bought the device about a month ago. I discovered the bug 8 days later as I didn't switch it off earlier. (Or I might have once or twice right at the beginnging but then it worked.) So even if I would have been in the US I couldn't have RMA it as it was have been over the 14 days. Actually I discovered the bug accidentally as it freezed after disconnecting the charger (I almost never turn my gadgets off).

So I bought this thing in december and during that one month the price have fallen about 40-60 USDs. Now if I send it back for a repair and don't have it with me during that time how much does it cost (not counting that I NEED IT )

Well I'm taking the return to Buy.com path. I can only hope that I get a 'fixed' unit. As you all know....very frustraing as the device is great when it works!!!