SRX5308 bootloader checksum error

I got the test-light-of-death on this box out of no where, the box bricked hours after making a change to the reboot schedule. the device does not respond at all from any network interface. Connecting to the console port, it is clear that something corrupted the onboard OS image, there is a checksum error;

U-Boot 1.1.1 (Development build, svnversion: exported) (Build time: Jan  6 2011 - 16:15:26)

Warning: Board descriptor tuple not found in eeprom, using defaults

CUST_SRX5308 board revision major:2, minor:0, serial #: unknown

OCTEON CN5010-SCP pass 1.1, Core clock: 700 MHz, DDR clock: 200 MHz (400 Mhz data rate)

DRAM:  512 MB

Flash: 64 MB

Clearing DRAM....... done

BIST check passed.

Net:   octeth0

== Executing bootcmd in 5 seconds - enter ctrl+c to abort                                                                          0

Checksum error!!

SRX5308 bootloader#

I would imagine the box could be recovered with a tftp load via the console. Is there a procedure and the proper files available to un-brick this box?