I'm having the very same issues as MuzikFreakah. This is a friend's phone, and I don't know what he did to it after rooting it, but it had been running just fine for some weeks after rooting.
The battery is fully charged, though when I put the phone on the charger, I don't (usually) get the LED indicator for either "charging" or "charged." I know the battery is full because I swapped batteries with a different N1 and that phone showed it at 100%. That phones battery didn't give me any difference response that the original battery.
I can (occasionally) get to the HBOOT menu (hope you don't mind me linking to your images):
But everything I try from there results in the dreaded "locked" screen:
I have tried clearing storage (going to factory default), and did get the message that it completed and it said it would reboot in five seconds. In less than five seconds it shut down and didn't come back up.
I've been trying to get into the HBOOT menu by holding down volume-down and power, and have just seen that holding both the rollerball and power in will get me into the fastboot menu. The first and second tries there worked, but I haven't tried again yet (waiting for more files to download).
I've tried renaming multiple ROMs (CM 5, some others, stock (I think)) as update.zip and they aren't found. I've checked the md5 sum on at least CM 5 and a couple others.
I've redownloaded Rusty!'s file and renamed it passimg.zip, but now I can't boot into recovery or fastboot. It seems to me that there is a capacitor in the phone that charges while the battery is in, and as long as that cap is above a give threshold, I can't boot. But, if I leave the battery out long enough (sometimes minutes, sometime an hour or so) that I can put it back in and boot on the first attempt.
I'm not using ADB, I'm just copying files to the SD card using a USB adapter. I will go through the ADB setup if I need to, but the first attempt didn't work and I haven't made time for it since because I haven't seen anything that I really need it for. If I'm overlooking something, please point it out to me.
This is a phone we use for our work, and I really need to get it running. Any help?