[Jaiguru]

Hi,

DON’T DOWNGRADE BIOS FROM V5 TO V4 !

I have a v5 Jumper EZbook 3 pro and tried to “downgrade” it using v4 bios. Bios id are different which stopped the flash process, so I decided to force it (there’s an option for that). Now my laptop is bricked and no more boot 🙁

I’m now looking for a way to solve this issue but I’m very pessimistic.

Regards

[Jaiguru]

Hi,

Using tool and method described in the other post, I tried to downgrade my BIOS from v5 to v4. The bios flashing tool refused because the bios id of the v4 image was different from the bios id of my laptop (mine is 3BANS002 while v4 is 3BANS010). I then checked on the other laptop I own (the one that I will call v6 which bios from 11/06/2017) and bios id is same as v4. As only the v5 has a different bios id I decided to force a bios downgrade anyway… but now my laptop is bricked: it no more boots. The power led light on but nothing happen, screen stays black.

I’m trying to find a way to put it back to life but that doesn’t seem easy.

So it seems that v4 has something slightly different that other versions.

FWIW, I can share bios dump of v6.

Regards

Attachments:

You must be logged in to view attached files.

[Jaiguru]

Hi,

Tobias wrote:

Hey guys. I am new to this board. Just received my EZBook 3 Pro with a BIOS from November. […] So would this be v6 of the BIOS or did I miss something?

FWIW, I own 2 jumper EZbook 3 pro : one with 09/30/2017 BIOS (usually described as v5) and one more recent with 11/06/2017 BIOS which seem to be same as yours. I opened both laptop to check PCB and they are slightly different (I’ll try to find time to share pictures if someone is interrested) but it seems that all internals are still the same (I compared hardware list using tools).

My issue with my v4 is that touchpad and suspend/resume don’t work under linux, so I’ll test a firmware upgrade or downgrade…

Regards and Happy new year

[Author]

Posts