Dell 8FC8 Patcher

[shnxxx]

Hi! I just bumped to this thread looking for answers on how to remove my Dell Latitude 5420 BIOS password. I am quite confused on how to do it. I can see that there's a patcher. I already saw a video how to use it.
From my understanding:
1. You just need to drag the "file" to the patcher
2. Patcher will do its trick
3. Patcher done its work

Where am I confused:
1. Where could I get the file?
2. On the video provided, didn't saw the password.
3. Do i need to open the laptop? Because in my case, I can't open the laptop since it was from an organization. My problem is that, I need to complete reset/reimage the laptop, but it won't let me do it since the BIOS is locked. "Reset this PC" option doesn't work on my end for unknown reasons.


EDIT: Here are the infos for my laptop:
Model: Dell Latitude 5420
Service tag: 7JFJPN3-8FC8


Any help would be much appreciated! I only need to unlock the BIOS so I can boot from USB.

[hoaca388]

Where am I confused:
1. Where could I get the file?
2. On the video provided, didn't saw the password.
3. Do i need to open the laptop? Because in my case, I can't open the laptop since it was from an organization. My problem is that, I need to complete reset/reimage the laptop, but it won't let me do it since the BIOS is locked. "Reset this PC" option doesn't work on my end for unknown reasons.


EDIT: Here are the infos for my laptop:
Model: Dell Latitude 5420
Service tag: 7JFJPN3-8FC8


Any help would be much appreciated! I only need to unlock the BIOS so I can boot from USB.

Red : In your machine. You need to buy a programmer and learn how to use it.
https://www.youtube.com/results?sear...mer+how+to+use
Blu : Must disassemble the machine.

[MOHDZGSM]

Thanks it worked for me dell 5440

[Ven]

Hi, just to confirm - before I mess anything up - is this patch for unlocking the BIOS Admin Password, as shown in the attached photo? Thanks

[SMDFlea]

Hi, just to confirm - before I mess anything up - is this patch for unlocking the BIOS Admin Password, as shown in the attached photo? Thanks

If the suffix is 8FC8 yes.

[newVAS01]

I would like to use the patcher app on Precision 3550 to clean the BIOS password.
I can access the BIOS but can't change the settings: Absolute is set to enabled.
I moved an nvme SSD with W11pro installed and finished the install from the
Precision 3550. I looked for typical files installed by an active Absolute service:
none, so maybe it might not have been activated.

(Precision 3550, Motherboard: LA-J451P, ServiceTag: 5ZQNK63-8FC8)
Well, before the patcher/Absolute I don't know exactly which one is the BIOS,
therefore my question:
Which one is the BIOS main chip? (take a look at the images attached)
A: sop8, 1MB GigaDevice GD25Q80CSIG
B: sop8, 1MB GigaDevice GD25Q80CSIG
C: wson8, 32MB XMC QH256BXIQ
or there is another chip on the motherboard that is the main BIOS chip?

I clamped both A and B chips, took some readings. 1MB each, compared them and they
are different. I am almost sure main BIOS is the 32MB chip: C (wson8 XMC QH256BXIQ)
I have to desolder chip C and, on the other face there are some small electronic parts
that I am concerned with while reflowing.
(I am new at working with a hot air reflow station so maybe some of you which are
highly skilled would be nice to share some tips/tricks about desoldering when there
are some parts on the other face in order to protect them from accidental overheating.
I have plenty of old boards to practice...)
Many thanks for reading my post and for your advice.

[peste]

the bios is the one with 256...try removing the chip on other boards...find a video on the internet...if you are careful the pieces on the other side won't come off...
re is a video for example..https://www.youtube.com/watch?v=DWWi...nnel=ThisIsHow

[DAHOUD]

This Patcher is unmatchable, worked well today am just appreciate for your effort rex98 and other members, may God bless you All 🙏

[newVAS01]

Desoldered the 32MB chip, took multiple readings, did the patch, wrote patch on
chip, took a reading of patched chip and compared it with the original patch.
All good. Soldered back the chip. The small parts from the back side looks good,
soldering looks good. I have 2 cheap programmers (EXP 2023+ and CH34 v1.7 blue)
and readings were done with both of them.

Put back all parts. Plugged battery. Used verified RAM. Verified all things connected
the right way. Power button works good. Plugged in Dell 180W power supply unit.
1st: Without pressing the power button laptop turned on when I plugged PSU, keyboard
illuminated, power LED is white, no Dell logo, fan is spinning, turned off by itself
in 10-12 seconds. I was expecting to reboot by itself... nothing, power LED off.
2nd: Press power button, the power LED is amber for an instant then is off. As long
the power button is pressed the power LED is amber.

Precision 3550, Motherboard: LA-J451P Rev:1.0(A00), ServiceTag: 5ZQNK63-8FC8
Here is the BIOS backup + my patched/written file. I would appreciate if you make
a working patch so I can try again.
Thank you.

[peste]

Desoldered the 32MB chip, took multiple readings, did the patch, wrote patch on
chip, took a reading of patched chip and compared it with the original patch.
All good. Soldered back the chip. The small parts from the back side looks good,
soldering looks good. I have 2 cheap programmers (EXP 2023+ and CH34 v1.7 blue)
and readings were done with both of them.

Put back all parts. Plugged battery. Used verified RAM. Verified all things connected
the right way. Power button works good. Plugged in Dell 180W power supply unit.
1st: Without pressing the power button laptop turned on when I plugged PSU, keyboard
illuminated, power LED is white, no Dell logo, fan is spinning, turned off by itself
in 10-12 seconds. I was expecting to reboot by itself... nothing, power LED off.
2nd: Press power button, the power LED is amber for an instant then is off. As long
the power button is pressed the power LED is amber.

Precision 3550, Motherboard: LA-J451P Rev:1.0(A00), ServiceTag: 5ZQNK63-8FC8
Here is the BIOS backup + my patched/written file. I would appreciate if you make
a working patch so I can try again.
Thank you.

Write back the original bios and see what happens...

[wing]

I tried to download the patcher, but every time I click on the file to download it, I get a "Invalid File Specified" message on a blank page. I tried to access it from an incognito window to rule out browser cache, but got the same result.
Any help would be greatly appreciated