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I updated my netbook TXE firmware and now headphones are not working

EF10MI2 TXE Firmware Headphones Curse

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#1
Friedrich Schnellinger

Friedrich Schnellinger

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Intel-Powered-Classmate-PC.jpg

 

I have a netbook EF10MI2 (I think they're know in the USA as Intel Powered Classmate PC ‘Clamshell’ or Marble Point) with Windows 7 Ultimate x64, and one day it just died. It was the typical corrupted BIOS issue (This model is known for this) and the solution is well known as well; flash the BIOS (UEFI). When I was about to start the process, I decided to look for the latest version for these netbooks, which I found is v1.04.

 

I started the process, and it all worked as it should, I recovered the PC. Later on I was reading the documentation that came in the ZIP and they recommended updating the TXE Firmware as well. I was unsure if my antivirus would stop the process thinking it’s “suspicious” so I did it via EFI shell. And it worked.

 

Two days later I wanted to listen to some music and I noticed the netbook ignored the headphones; the music is played on the speakers only. I thought my headphones were broken so I tried another and they were also ignored. I thought it was a driver issue, so I uninstalled the Realtek HD Audio drivers, rebooted the netbook, then re-installed the drivers, the problem is still there. Then I uninstalled them again, rebooted, downloaded the latest drivers (2021) and installed them, nothing changed. At last I re-installed Windows, nothing changed, and the netbook is still ignoring the headphones.

 

So I flashed a debian distro to my flash drive and booted the live mode. I was surprised to see the OS couldn’t find an audio device, which is odd because it was fine before updating that goddamn firmware.

 

Then I decided to perform a BIOS downgrade to v1.03. It can’t be done via Windows batch or EFI shell, it must be done via recovery mode. I’m going to write it here so people can learn. It is obvious you need another PC:

 

 

  • Format the flash drive to FAT32 and 8192bytes cluster size (8kb)
  • Unzip the BIOS ZIP contents to the flash drive
  • Rename the file “MP0035p.cap” to BIOS.cap

**With the netbook off**

  • Connect the flash drive
  • Press and hold Fn+R on the keyboard
  • Connect the charger (You should see a blinking pink light)
  • Press and hold the power button for 3 seconds
  • Release all keys and wait. No user input is needed; well it was like this for me.
  • When it’s done, the netbook should power off, disconnect the flash drive and the charger
  • Turn it on, enter the BIOS configuration utility, check the version, it should say:

MPBYT10A.86A.0035.2015.0211.1604

That’s all.

 

 

Well, the process worked, I downgraded my BIOS successfully. But still can’t use headphones. Then I tried to downgrade the firmware to the version that came in the v1.03 ZIP, and got this error:

 

Intento-de-TXE-firmware-downgrade.jpg

Error 8758: The image provided is not supported by the platform.

 

Then I tried via EFI shell and I got the same error.

 

And here I am, unable to listen to music with my headphones. Any ideas? What should I do?

 

I have another of these netbooks with its original BIOS, here’s the information:

Intel TXE Firmware 1.1.0.1089

BIOS MPBYT10A.17A.0030.2014.0906.1259

BIOS Version: 1.02CAN

EC Version: 1.03

 

I got a PDF from intel with the technical information, you can either download it (Mediafire) or read it here (Copy&Paste)

 

Content Type Product Information & Documentation

Article ID 000006284

Last Reviewed 12/18/2019

Local vendors can provide geographically relevant, and culturally appropriate teaching and

learning solutions for the Intel® classmate PC

.

Hardware Specification

Processor

Intel® Celeron® Processor N2805 and N2806, Bay Trail - mobile Dual

Core

Memory 4 GB DDR3-1066 MHz

Storage

SSD SKU: 16 GB/32 GB/64 GB SATA 2.0 connection

Hard Disk SKU: 320 GB/500 GB SATA 2.0 connection 5400 RPM, 2.5¨

HDD (7 mm), Intel Education Hard Disk Protection

LCD

10.1¨ 1366 x 768 HD, Color LCD, LCD TFT, LED backlight, 200 nits,

Anti-Glare for non-touch SKU/Glare for touch SKU

Operating System Windows 8.1* Pro 64-bit, Windows 7 Pro* 64-bit, or Linux*

Security McAfee AntiVirus Plus*, Intel® Education Theft Deterrent with TPM

Keyboard/Touch Pad Water-resistant keyboard/touch pad/power button (330 cc)

Camera 1.0 MP, 180 degrees rotatable camera

Audio/Speaker

/Microphone

Integrated audio, built-in speaker, and digital microphone

Handle

Integrated retractable handle supports micro-mobility in the

classroom

System I/O 1X USB 3.0, 1X USB 2.0, card reader, HDMI

Connectivity Wi-Fi + Bluetooth® 4.0, TV tuner (optional)

Battery Options

Polymer Battery, - 2 cell battery 25 Wh (3400mAh), - 3 cell battery 37

Wh (3400mAh)

Drop Test 70 cm drop-resistance

 

 

 

 

========================================================================

This is apart from the post, I ask this question here just to avoid creating another thread

========================================================================

 

Is there any way to ‘inject’ a custom BIOS splash image?

 

Some tutorials on the internet involves messing around with the BIOS binary itself, extracting the section containing the images with UEFITool, replace it with another image with the exact file size and then injecting it back into the BIOS binary. I tried this on another netbook and failed, I just can’t get my image to the required file size. All I got was a black screen.

Other tutorials shows the use of the Intel Integrator Toolkit, I downloaded it and it’s not compatible with these netbooks. I found an older version (5.0.3.568) and it’s not working. Apparently it’s only for desktop PCs.


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#2
SpywareDr

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Look all the way down in the headphone and make sure the very tip of a headphone jack. like this:

 

tip_of_headphone_jack_01.jpg

 

isn't stuck down in there. I've seen this happen before and it was a real bear to get it out. Ended up having to get down to the motherboard in order to peel one side of the metal box open, it looked similar to this one

 

headphone_socket_01.jpg

 

but only had a single hole, (The black part is the bottom that goes through the motherboard). I then used a straightened small paperclip to wiggle while pushing the headphone tip up and out. Then closed the box back up, powered the computer back On and tested. Bingo! It worked.

 

 


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#3
Friedrich Schnellinger

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I tried your solution, it didn't work. My jacks look good, and there's nothing into that hole.

IMG00038-20220404-2223.jpg


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#4
SpywareDr

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Whew, that's good to hear. Until you get the BIOS figured out, plug in something like this $7.99 USB to 3.5mm Jack Audio Adapter. (And that $7.99 includes shipping). https://smile.amazon...r,aps,62&sr=8-5

 

 


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#5
Friedrich Schnellinger

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After two weeks of this curse, I had to do what I was avoiding to do: To replace the motherboard with my other netbook. This other motherboard works fine, but for some reason it corrupts RAM modules, and when it happens all data on the HDD is completely lost. This is why this 'solution' was my last option.

 

I'll leave this thread open, one never knows if someone comes up with the solution.

 

IMG00039-20220405-0021.jpg


Edited by Friedrich Schnellinger, 06 April 2022 - 03:38 PM.

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#6
SpywareDr

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Water/liquid damage?


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#7
Friedrich Schnellinger

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Which of the two? If you're referring to the one that kills RAMs I don't know, I bought it used. I cleaned the socket with an old toothbrush before installing it.

 

If you're referring to the one with the audio problem then the answer is nope. I never let any liquid get any close to it.


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#8
SpywareDr

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The problem with electrically conductive liquids inside of electronic equipment is they allow electrical currents to travel across unintended paths. This can *immediately* damage/kill the electronic components those improper currents traveled through.


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