I might be way off here, but the symptoms sound pretty similar to those I experienced when my power supply gave up. Many people on this list suffer the same thing - sudden inexplicable slug failure (flashing lights, won't boot etc) that turns out to be caused by the power supply no longer being able to output 2A consistently. I think my power supply lasted 2 or 3 years.
When this happened to me, I fixed it with one of these:
and one of these:
If you have another 5V/2A power adapter to hand, it might be worth trying.
--- In firstname.lastname@example.org, "k.mclaren@..." <k.mclaren@...> wrote:
> I have had my NSLU2 for a while, since 2007, and had no problems. I only switch it on when I need to access my network drive.
> Last week I switched it on and it wouldn't complete its boot. The boot LED sequence looks okay initially but it doesn't come out of the Flashing Green Ready/Status state and give me that cheerful beep of readiness.
> This change has launched me on a 'voyage of discovery' which has been interesting but hasn't yet delivered a working NSLU2.
> Where I have been:
> 1. I read somewhere that removing the battery might help so I found out how to open the machine and did just that. No change on the reboot afterwards.
> 2. I discovered that I can contact RedBoot on the NSLU2 using the very useful information from the NSLU2 Linux website. I found the Ubuntu instructions worked a treat. This cheered me up as it looks like the beast isn't 'bricked'.
> 3. I decided to try and get back to basics so I updated the firmware with the Linksys version V23R63 code. I reset the SysConfig area before doing this using RedBoot. No change on the reboot afterwards.
> 4. I now decided to see if the Unslung 6.10 firmware would do any better. No change on the reboot afterwards.
> So there you have it. I know a lot more but still don't have a working NSLU2.
> Any ideas out there?