Originally Posted by jmcoffey
Do you have a factory cable? I would try flashing your bootloader if I was assured that the factory cable would work to fix it.
Sent from my Kindle Fire using XDA
Yes, I have a factory cable and I would have flashed it already if I could assure myself of that! That wasn't meant to sound rude, but sometimes these forum discussions fail to convey the *nudge nudge* facetious quality of some responses. I know you are trying to be helpful.
OK... for a progress update. It took me a while to find a box to reappropriate, back it up, install linux, etc. etc.... but...
# ./usbboot aboot.bin ../bootloaders/myfff/u-boot.bin
sending 2ndstage to target...
waiting for 2ndstage response...
sending image to target...
I have it booting through usbboot and my "custom logo" appears on screen. I originally expected it to complete booting, but it goes black after several seconds. This had me worried. After reading through a bunch more of pokey9000's posts in a few of the development threads, I now believe it's just supposed to stay in fastboot for a short time, blackout, then wait for another usbboot command... which makes sense since it's still in the 4003 bootmode.
At that point, I can give it another usbboot command and it will go through another cycle of what I pasted above. If I give it a few fastboot commands while it's in fastboot mode during the first several seconds after booting, it will stay in fastboot mode indefinitely, it seems. I've tried this with both my rebaked FFF as well as pokey9000's FFF 1.2 and the behavior is identical, with the exception of the boot logo, of course. I think it's working, but that's not to say I'm 100% confident either.
I'd love to have some kind of method to recover if it goes bad, but that doesn't seem likely...