Reflashing the EFI of Mac Pro 2009, (NOT MacBook)

So it has happened.

This is a long post, and my first, so have patiance.

First i describe the problem, and then the question is in the bottom. Thanks =)

Mac Pro 2009, black screen no boot chime
- Upgraded with 5.1 firmware
- Tested with two different CPU cards, both verified working in other machine (4.1)
- Removed everything, unplugged power, pressed powerbutton for 30 sec
- Swapped in new battery for clock, measured 3.3V
- Tried starting with empty chassie (removed WiFi, GPU, CPU, HDD..)
- Tried starting with no disk
- Tried 3 different GPUs
- Tried removing wi-fi
- Tried holding power button to enter EFI upgrade mode but power button LED will not start flashing
- Caps lock LED will not light on the keyboard, no USB power?
- Shorting the SYS RST on the Mainboard will not reboot machine
- GPU LED not on when DIAG button is pressed
- Tried swapping in known working PSU

The machine died when processor was swapped, but its nothing wrong with processor, ram or CPU board as it (the whole tray) works in other machine.
- Verified CPU tray working in other macine
- Verified RAM working in other machine
- Verified PSU working in other machine
- Verified GPU GTX680 working in other machine
- Verified HDD working, boots in other machine

- Diagnostic LEDs shows PSU green, +5V amber, and SYS PG green.
- EFI diagnosis LED not on (this makes me think it is EFI related problem)
- White LED on powerbutton shows constant white light
- If i remove some RAM white LED will start flashing, so something is working.

Disks spin, fans spin, but no signal at all to the screen, no boot chime, no nothing.

Pretty much boils everything down to the main board.

I have an idea about this, that it could possibly be the EFI that got corrupted.


One person had similar problem and solvet it with EFI reprogramming:
www.amibay.com/showthread.ph...-Pro/page2&s=102addb5d039e1424ac4bda7b201ae72

ebay seller for EFI Chip 2010 Mac Pro: www.ebay.com/itm/BIOS-EFI-F...231920?hash=item3d24d964b0:g:rQ0AAOSwMgdXzav2

I would really like som advice, and to know what kind of equipment i would need to reprogram the EFI when its still on the board. I know some people do this on MacBook, so i know it should be possible.

The programmers i find on Ebay does not program the specific EFI chip on Mac Pro. Maybe there is a normal programmer that will do these EFI chips with a clamp on connector and standard PC software?

I know there is people on this board that has good knowledge about reprogramming these chips, if i get some pointers on where to start i will make a writeup about it here on this board.

The problems i have right now are these:

- how to identify location of the EFI chip that holds the EFI. I have found two chips that are possible candidates.
- how to extract the EFI from Apple update and put it into EFI writer. I have the software with the EFI rom.
- how to program the EFI into the chip while still onboard.

Apple Mac Pro technical guide:
Guide

images of mainboard can be found in my thread here:
images of mainboard and two EFI chips

Seems there is SST chips with the SST 25VF032B 50-4C-S2AF (front) and SST 25VF040B 50-4C-S2AF(back) markings. These chips can be found on ebay.



Thanks

//GF

Have you resolved the case ?