Fujitsu E754 EC bios update killed pc

[pienari]

I have been looking for workking bios and ec file.
https://aijaa.com/Xe3fQ7
Board is CP620570 , CP642134-X3
https://aijaa.com/dBYLwb

I removed both eeprom chips and read data.
25Q32
25Q80
Bios file size is 4mb and ec is 1mb
Bios file was readable but ec was blank.

I have tryed all files found from net but no luck.

Have anyone backup files?

[fzabkar]

Is this the update?

EC Firmware Update for LIFEBOOK E7x4 vPro:
https://support.ts.fujitsu.com/indexdownload.asp?Softwareguid=1f74b5ad-5303-45ae-b310-abff9b23cad2

If so, I was able to extract a file named 4C46D217.EC1 from the .exe by using 7Zip. This looks like it might be the EC image you are looking for. I don't know if there are any reserved, unique regions, but it would be worth a try.

[pienari]

Hi.
This is non vPro model.

[fzabkar]

Can you post a link to the update?

Is this it?

https://support.ts.fujitsu.com/IndexDownload.asp?SoftwareGuid=9651CBB1-3E84-44E1-A2CE-064402CC018A
https://support.ts.fujitsu.com/IndexDownload.asp?SoftwareGuid=C8A56C4A-84E2-47BB-988E-79A9BAB25F02

Each package appears to contain an EC1 EEPROM image.

[pienari]

Hi.
I really dont know, laptop was dead when i get it for free.

Thank you for the links, i havent found those from Fujitsu page.

I downloaded both your linked files and cheked that EC1 file.
It is a bit smaller file size vs. what i found from web.

I have to flash that to eeprom and test.

[fzabkar]

I found this, but the EC file looks nothing like the update:

https://forum.laboneinside.com/viewtopic.php?t=358

The EC1 file appears to be an update for the East Chip microcontroller, whatever that is.

[pienari]

Yep.
That is different model with 8mb bios.

I have tested that and dead as rock.

EC update is something to do with battery charging controller.

I think bios files can fit from E735,E745 and E755 laptops.

[pienari]

Now i found this.
https://www.badcaps.net/forum/showthread.php?t=58246

E734 bios + ec

I have to check if that works

[pienari]

That bios+ec not helped.
I bought E754 motherboard from ebay and received it yesterday.
Installed it and computer boots now, but black screen.
External display picture is ok.

Fuse near to display connector is fine.