Dell Latitude 3390 2in1 - clean Bios for unlock?

[Pingo!]

Hey y’all who still browse this forum
any chance I could get an unlocked bios for my latitude?
figured just pulling and putting the cmos back in would work but it was no good (thanks fell for not putting bios clears on laptops!)
anywho could I maybe get a guide on how to flash the bios? Don’t wanna brick this thing haha
(service number/tag is G359JT2 bios version 1.6.0)

[bolangchi.ent19]

DELL LATITUDE 3390 2IN1 P69G
SERVICE TAG:552CQT2
PROBLEM BIOS PASSWORD LOCKED

[danito]

DELL LATITUDE 3390 2IN1 P69G
SERVICE TAG:552CQT2
PROBLEM BIOS PASSWORD LOCKED

what's your suffix?

[LBTT1121]

DELL LATITUDE 3390 2IN1 P69G
SERVICE TAG:552CQT2
PROBLEM BIOS PASSWORD LOCKED

attach bios dump

[Ven]

Hi, my Latitude 3390 2-in-1 stopped booting after Windows was keep updating BIOS, I think BIOS is now corrupted.
My Service Tag is : CZSG4P2
Express Service Code: 28285486022
Also, I want to learn what you do and how you do. I researched already, I think Service Tag and Region should be added to BIOS file, But I couldn't even extract BIN file from the EXE file I downloaded from Dell Website.Can someone pls show me the way? Thanks.

[lapfix]

Hi, my Latitude 3390 2-in-1 stopped booting after Windows was keep updating BIOS, I think BIOS is now corrupted.
My Service Tag is : CZSG4P2
Express Service Code: 28285486022
Also, I want to learn what you do and how you do. I researched already, I think Service Tag and Region should be added to BIOS file, But I couldn't even extract BIN file from the EXE file I downloaded from Dell Website.Can someone pls show me the way? Thanks.

You are welcome
everything is detailed at this excellent topic :
https://www.badcaps.net/forum/troubl...rces-and-tools

For more techniques about extractig and editing i sugger to you this youtube channel :
https://www.youtube.com/@wrongchip

[Bios Cracker]

Hi, my Latitude 3390 2-in-1 stopped booting after Windows was keep updating BIOS, I think BIOS is now corrupted.
My Service Tag is : CZSG4P2
Express Service Code: 28285486022
Also, I want to learn what you do and how you do. I researched already, I think Service Tag and Region should be added to BIOS file, But I couldn't even extract BIN file from the EXE file I downloaded from Dell Website.Can someone pls show me the way? Thanks.

Try and Update

[Ven]

Try and Update

Unfortunately still same. Upon pressing the power button, keyboards lights lit up, fan spins at max level for about 3-4 seconds and then laptop shuts itself down.

[Bios Cracker]

Unfortunately still same. Upon pressing the power button, keyboards lights lit up, fan spins at max level for about 3-4 seconds and then laptop shuts itself down.

Did the symptoms changed with new image or it's same?

[lapfix]

.

[lapfix]

Try this downgrade version
Your bios vers : 1.35.1 the last update
Try : 1.7.0 Release date 02 Nov 2018

[Ven]

Try this downgrade version
Your bios vers : 1.35.1 the last update
Try : 1.7.0 Release date 02 Nov 2018

Unfortunately still same, nothing was wrong with this laptop, it was working, windows was showing BIOS update is pending, I confirmed to carry on but I knew BIOS was already on this shown version. Anyway update process went through successfully, and Windows showed same update again on the next boot, I confirmed againjust to get rid of this from the update list, now it doesn't work.
Symptoms are same, upon pressing the power button, keyboards lights lit up, fan spins at max level for about 3-4 seconds and then laptop shuts itself down.

[Ven]

Try this downgrade version
Your bios vers : 1.35.1 the last update
Try : 1.7.0 Release date 02 Nov 2018

Success ! Laptop somehow came on, with fan is spinning at full speed and also some messages before the Windows started. Windows started and I managed to download BIOS EXE file from Dell website and install. After BIOS update there were again some messages so I needed to go to BIOS and enter Service Tag manually. Accepted and fan speed came to normal and now laptop functions as before. Thank you very much for your help !

[lapfix]

I'm glad it worked out