Hi all,
I've just got a Nokia 770 and want to get the root access.
I flash the developer rootfs successfully and it works properly. But when I use the flahser to enable the R&D mode, after the following command is finished:
./flasher --disable-rd-mode -R
Suitable USB device not found, waiting
USB device found found at bus 005, device address 029
Found board Nokia 770 (F5)
NOLO version 0.9.0
The device is now in R&D mode

The device reboot and I see extra device information on the display. But from that time, the display turns to work inproperly, a lot of vertical strips over all the content displayed all the time.
The problem still exists even I turn off the R&D mode and flash back the origianl binary.
Is the hardware bugs or software problem?

Hello.
Sorry, but I think it's a big hardware bug! Look "http://maemofr.org/viewtopic.php?id=47": you can see a screen like yours.

But, is there any method to recover it by myself? The only way is send back to make it repaired by factory?

Sorry, I don't think. On forums, the only way is to dend the tablet to Nokia

What's a pity! But I want to know whether this hardware bug will happen frequently or will definitly happen when I change to R&D mode? Because I brought it in Europe and I live in China, it's impossible for me to send it back to Nokia to repair very frequently.

I'm in R&D and never problem. But, My tablet is 7 months old and I red on forum that this problem is a recent problem. The best for you is to contact Nokia support and ask them if the reason of this failure is known and solved

I got mine a week or so ago and immediately:

- flashed it to 2006 OS beta to try. Liked it but needed some of the 2005 OS only hacks so I
- reflashed to 2005 OS
- flashed to turn on R&D mode, did changes so I could gain root even without R&D mode
- flashed to turn off R&D mode

... have since booted and rebooted many times and have had no problems... yet, at least.

i dont think its related to R&D nor Root mode because when it happened to me i wasnt neither Root or R&D as i dunno how to do it .
i just turned on the tablet in the morning and the screen was dead...with absolutely no reason...the tablet was not even connected to the power charger. :/

++
Sem199

I heard that this problem will mostly happen on the newest batch of 770 products, but I'm not very sure about it. I have to contact the Nokia support.

After a couple of months rebooting evrything was fine. Then I flashed the 2006 Beta and after approximately 10 times my screen went white. Delivered it at the Nokia service point 2 days ago. The had to send it in they said. Well lets wait what will happen. The white screen of death should actually be a reason for NOKIA calling all 770s back.