I have a bricked 7910 motherboard, happened during bios upgrade. I have never done this kind of work before. I am good at following instructions and technically savvy. I have some really dumb questions, so please accept my apologies in advance.

1. Where is the bios located.

2. Can I use the raspberry Pi method to flash this bios.

3. I dont know how to do soldering, is it possible to use tester cable to connect to this bios ?

4. I see there are few downloads in this thread, i am dont know which one i should use to recover the bios.

Thank you so much for your time and consideration.

i figured it out, its the MX chip located near the screw MH9 enclosed in printed box that says SP1.

Hi friend, so none helped you , i will make it.

1. Where is the bios located.
1. The Firmware is into the Eeprom Chip (Bios is only a Region of it)

2. Can I use the raspberry Pi method to flash this bios.
2. Yes it's possible as it has programmable channels, but it is very difficult to make, better use an CH341a (very cheap $.15,00 with the clip)
Example https://www.youtube.com/watch?v=KNy-_ZzMnG0

3. I dont know how to do soldering, is it possible to use tester cable to connect to this bios ?
2. You can use a Pomona Clip to get the eeprom chip wires easy ...

4. I see there are few downloads in this thread, i am dont know which one i should use to recover the bios.
4. I don't know your pc , so it needs to read on Bios Page Dell if threre is Recovery Bios and way to do ...

I will give a look on Dell to see the possibility to Recover by as USB Stick and file your pc (Dell had it).
Regards

P.S. the Eeprom Chip has 8 pins and it a 25xx serie, MX Micronix , may be , post a photo please.

I was able to locate the chip and its made my MXIC Part # MX25L12873F.
I used CH314A with tester clip. to copy i used V 1.34. This is where the fun began, I had to dow grade software version in order to clear the old bios. Once i was able to to clear it using 1.18 , I was able to flash the motherboard and and do further updates directly.

I wish there was a way i can restore the service tag as it was over written during this process.

I hope you made a Firmware Dump before to write on the new one , so your System Data are into the backup and we have only to extract to rewrite into the new one.
Dell has some tools to make that ...
Let me know
Regards