Dell Latitude 7400 EDC40 LA-G871P

[peste]

hi
can you help me with dell latitude 7400 ?
8RY23X2-CF1B

What's wrong with your laptop? What can we help you with?
post S/T, full name and model, motherboard model, etc.
post the contents of the bios chip even if it is corrupted..

[peste]

post merged...next time look for a thread with the name and model, motherboard model of the laptop, and post there, if you can't find it, then make a new thread..

[sliptend]

hi
can you help me with dell latitude 7400 ?
I have lock bios password on my PC
8RY23X2-CF1B

[mmalagelada]

Finally got time to do it. SUCCESS!

1: Protect the PCB with aluminium tape. I had no availability for kapton. Nobody wants nearby capacitors flying away.
2: hot blower at 360ºCelsus.
3: Preheat the zone.
4: Attack the SPI Chip that in my case it ws a 25Q64JVIQ in WSON8 Capsule. 30 seconds was enough.
5: Clean the chip and attach the WSON to DIL adapter. Read with the CH347 Black edition reader. Software used: NeoProgrammer V2.2.0.10
6: save the file (8Mb for the 25Q64JV)
7: execute the Badcaps 8fc8 patcher.
8: Flash the patched file to the chip
9: Read and compare to make sure the write was successful.
10: Cure the PCB with the solder, flux, and wick. Drop some solder paste, I used 170ºC fusion point tin-lead paste.
11: Preheat, heat, solder..
12: Clean
13: reassemble and Start the computer
14: Wait 2 to 3 minutes. it will start in Factory Mode.
15: Write the service tag when prompted.
16: Once restarted press Alt+F to exit factory mode.

Password was removed. Donation was made.

[SMDFlea]

hi everyone, can someone help me with this bios of a Dell E5540? it have bios password... thank you very much!

Off topic, this thread is for the Latitude 7400 .Find a E5540 topic to post your request in, and include the required service tag. Read the rules - https://www.badcaps.net/forum/troubl...before-posting

[rioda91]

hi everyone, can someone help me with this bios of a Dell E5540? it have bios password... thank you very much!

[hoaca388]

Hello

Who can help me remove the BIOS password?

My service tag is: 4XLGYY2

Thank you for your help.

File's corrupted.

[Pasco97233]

Hello

Who can help me remove the BIOS password?

My service tag is: 4XLGYY2

Thank you for your help.

[mmalagelada]

I just found a related post in BadCaps. As I see in the photo, it is in the underside ob the PCB.

[SMDFlea]

Its UC5 ??

[LBTT1121]

Someone can point me to the propper chip to read?

I can see:
- UC6 25Q128JVSQ
- UT5 25Q80CSIG
- UT2 25Q80DVS1G

First one is a 16Mbytes flash SPI, and I can see people here having a 32Mb SPI for the Latitude 7400 LA-G871P

If I read UC6 and try to apply REX98 8FC8 patcher, I receive the error :
wa nakit-an ang intel signature
Pinduta bisan unsang key para ma exit...

I've read using a clip and also desoldering the chip and reading directly connected to the CH341 Black, and the file is always the same.

Thanks.

pass on UT5

[mmalagelada]

Someone can point me to the propper chip to read?

I can see:
- UC6 25Q128JVSQ
- UT5 25Q80CSIG
- UT2 25Q80DVS1G

First one is a 16Mbytes flash SPI, and I can see people here having a 32Mb SPI for the Latitude 7400 LA-G871P

If I read UC6 and try to apply REX98 8FC8 patcher, I receive the error :
wa nakit-an ang intel signature
Pinduta bisan unsang key para ma exit...

I've read using a clip and also desoldering the chip and reading directly connected to the CH341 Black, and the file is always the same.

Thanks.

[docW4rte]

Thank you for the advice. That makes sense—I’ll look into the possibility of flashing the EC as well, although I don’t have prior experience reading the EC on this MEC model. I hadn’t considered that a version mismatch could be the cause. I’ll give it a try. Thanks again for your help.

[m4tito]

Dell is picky and you'll probably need to flash the EC as well. If the EC has a different version than the BIOS, the laptop may sometimes fail to boot.

[docW4rte]

Yor serviceTag is different did you flash another bios!!
AT the sticker is Vpro indicated !!


Latitude 7400
Service Tag: 37ZK5Y2
Version
1.39.0.

Try and Give Feedback

I understand, and thank you for the clarification. It's possible that the BIN is no longer the original one, as I received this notebook from a client who had already taken it to another repair service before. However, the Service Tag is authentic and matches the one on the case.

After replacing a shorted component in a 1V power rail, I encountered this startup issue. I've tested the file with version 1.39 you shared, but I'm still facing the same problem.

Do you think this could be solved with a clean ME?

[lapfix]

Re: Dell Latitude 7400 EDC40 LA-G871P
Service Tag: 37ZK5Y2

Good day everyone, could you help me with this BIN? The unit makes one fan revolution and then dies. It displays main voltages but no video at all.

Yor serviceTag is different did you flash another bios!!
AT the sticker is Vpro indicated !!


Latitude 7400
Service Tag: 37ZK5Y2
Version
1.39.0.

Try and Give Feedback

[docW4rte]

Re: Dell Latitude 7400 EDC40 LA-G871P
Service Tag: 37ZK5Y2

Good day everyone, could you help me with this BIN? The unit makes one fan revolution and then dies. It displays main voltages but no video at all.

[mateusassuncao]

try..

it worked fine
tank you veryyy much!

[peste]

Guys, (laughs) here in Brazil it's already 01:00AM, can anyone help me!?

try..

[mateusassuncao]

Guys, (laughs) here in Brazil it's already 01:00AM, can anyone help me!?