tiny6410 not booting anymore

Hi,

I am struggling with my tiny6410 + sdk. I was successful to launch dnz and
upload my new kernel yesterday but I screwed somewhere. Now my tiny6410 is
not booting anymore.

Basically, I connected the board with serial + usb accessing u-boot and
uploading kernel. I was always getting the same error Oops 5 blabla while
launching the new linux kernel (even when using the one from friendly arm
cds). I tried to select "erase nand flash" once (why not? :-)) and from now
on the card can't boot. It means I have a white screen and I don't see
anything on the serial port COM0 (even with oscilloscope).

I was pretty confident that I could save the board by booting on a sd card
but I have the exact same thing with it. I flashed a kingston 2gb with
superboot (tried version Superboot-6410-20111102.bin and
superboot-20110722.bin) and added linux kernel, qtopia and so on. But I
obtain the same comportment : white screen and nothing on serial (just high
level but no communication).

Do you know how I could debug this? I can understand that I erased the
uboot accidently on the board but why isn't booting with sd either?

Thank you for any help.

I didn't spend time reading your descriptions. However, I would suggest to
get the Superboot up and running first before adding any other things, like
kernel, etc.

Good luck

Got it working finally. I just flashed the sd card with superboot and
didn't add all linux, yaffs, etc. I was then able to upload the kernel and
everything through usb and reboot on nand. Just don't copy the
friendlyarm.ini that auto-flash the board ! 
Thanks anyway