Conclusion (TLDR)- Fixing a failed 3D printer controller board

Summary

To summarize what was covered in Parts 1, 2 and 3 of "Fixing a failed 3D printer controller board":

• Couldn't update the Printrboard firmware from FLIP; probably due to a locked AVR chip.
• Made note of the printer's calibration settings
• https://printrbot.zendesk.com/hc/en-us/articles/202227454-Default-Steps-Per-Millimeter
• https://printrbot.zendesk.com/hc/en-us/articles/202714930-Default-Build-Dimensions-and-Sensor-Offset
• Downloaded the latest printer firmware hex file from the Printrbot support page
• http://printrbot.com/Simple/
• Got an AVR programmer:
• https://www.adafruit.com/product/46
• Built it:
• https://learn.adafruit.com/usbtinyisp/make-it
• Downloaded Windows drivers to a laptop and connected to the AVR programmer:
• https://learn.adafruit.com/usbtinyisp/drivers
• Downloaded 'avrdude' and connected to the Printrboard
• https://learn.adafruit.com/usbtinyisp/avrdude
• Re-programmed the Printrboard's AVR fuses for the CDC bootloader 
• http://reprap.org/wiki/Printrboard#Bootloaders
• Downloaded the CDC bootloader, programmed the flash's boot section and application section
• http://blog.lincomatic.com/?p=548
• Updated the printer's calibration settings in EEPROM
•  http://help.printrbot.com/Guide/How+to+Reflash+Firmware/78
• Happy printing!