Need Dell One XPS 2710 Motherboard

Kudoz

I am trying to downgrade bios from A12 to A10.  Then, I found the warning from Dell bios download site.

""Attention! Once you upgraded the BIOS to A12. Please DO NOT downgrade the BIOS to any older version.""

In my case, I did not upgrade the bios in normal fashion, just replaced bios chip and EC chip without doing nothing on Video bios.  

Do you think loading A10 using USB-dos will brick the system again?  What would happen if we downgrade bios and what would be the problem?

Any feedback would be appreciated.

Scrag

Hmm, not sure about that mate. Don't image it's likely to cause an issue, but always a chance it could.

If you're comfortable with the hot air gun, I'd be swapping your old EC chip back in and trying it with the new BIOS chip... If that didn't work either, then flashing the BIOS with an older version would be the next step.

Scott

Hi mate, just following up on this as it's driving me nuts, haha.

You listed the ROM Recovery holes pinout as:

CHIP Pin map is : 1-/cs 2-DO 3-/WP 4-GND 5-DI 6-CLK 7-/HOLD 8-VCC

Rom Recovery holes map is: 1-/CS 2-DI 3-DO 4-CLK 5-GND 6-VCC 7-no hole 8-/CS

with hole 1 being the one in the bold corner.

But I haven't had any luck with detection several times. Are you certain of this pinout? I'd be surprised if -/CS leads to both ROM recovery holes 1 & 8... and there's no -/WP on the ROM recovery section?

Cheers,

Scott

That should be the right pinout, I lost the paper where i noted all down so i cannot check it anymore. Although the first time it recognized the chip at once, later after some insuccessful detections we had to plug the power chord to the machine. And it was then recognized every time. You could try that... of course be extra careful not to touch any metallic part while the cord is plugged!

You could also check the tension of the chip conectors and the board holes  with a power meter and write down the map!

hope this helps,

cheers,

Giulio

Hi Guilio, on your picture, jumper J3106 is placed/connected over upper two pins, while I checked my board and other pictures on the internet, the jumper is placed over the bottom two pins. Any reason why yours is different? Thank you for the valuable information.