coreboot

This one is a different story but may be related to my Optiplex 9010 issues. I recently updated coreboot on my X9SAE-V, using the same settings I had previously and after rebooting it doesn't seem to post. Previous build used SeaBIOS 1.15 (worked great), recent compile with SeaBIOS 1.16.1 and coreboot 4.19 causes no post. Did some research on the microchip used for flashing on this board but can't get it to flash externally using a Pomona 5250 w/ Raspberry pi. Guessing the pi either doesn't supply enough amperage on 3.3V for external flashing or the chip is in circuit with something on the board that requires the chip to be desoldered before reflashing externally. I have a copy of the stock bios and a working coreboot build, any suggestions for unbricking would be greatly appreciated before I try to source another board.