I'd try opening it and giving it a well-regulated 48v through the pin header; could just be a power supply coincidentally going EOL, unless you're getting a linux crash out the console - if is linux, booting the recovery partition or redboot xcopy recovery are valid options here and covered in detail elsewhere on the forum.
I can provide a binary with instructions to load via flashrom, will need your MAC address sent privately; this approach does require a specialized programming cable but you might have one around or several purchase options exist that are cheaper than shipping, you need something that speaks SPI, like a tigard, SPIdriver, TotalPhase Aardvark, or BusPirate-- flashrom's man page has an entire list of supported programmers but these 4 I've tested.
You can just ship it in, too, I can flash it for you -- probably less stress and waiting for progress bars, but a little more expensive.
julian@netonix.com