Full FW Install / WP

Support General Device Support
1

System Details

  • Device: Yahiko-Oput (hp 14a-nf0131wm)
  • OS: ChromeOS
  • Firmware Type: Currently Stock
  • Firmware Version: (Recovery FWV) Google_Yaviks_Ufs.15217.392.0
  • Internal storage type: 128gb eUFS
  • HWID: YAHIKO-OPUT C4B-B3H-H3D-F6E-Z2M-Y6A-A8G

Summary of the Issue

Able to use developer to use terminal functions for Firmware-util.sh. Disconnected main battery and rebooted to install full utility, but write protection still exists. What do I need to do to write full FW for Linux Mint install? I checked using another command using Crosh something about the voltage needing to be negative or neutral to bypass WP.

2

why did you think this would do anything? because it works that way on some other devices?

reading the instructions on my site, which include the WP disablement for all supported devices, would be a good start

please don’t tell me you were using LLM-generated instructions, rather than reading the documentation here and on my site.

3

Thank you for the kick in the brain and restarting it for me. lol. I read the CR50 and totally missed the Jumper picture. Exactly as it was inside my CB.

As far as the instructions I read… I can’t honestly say that and be truthful. So I’ll just keep quiet.

Putting my device in developer mode now and will attempt the Jumper bypass.

4

I have created a solder jumper as your picture shows and I still have WP enabled. I did it exactly as the guide specifies. What am I missing?

5

IDK, I’ve not used that method myself on Yahiko, I used the CCD method on mine. It was reported by another user.

6

Again, thank you for jarring my thought process back on track. It’s looking like I will need a SuzyQ cable to do this. I think I’m going to read up on how to dual-boot since I can install Legacy FW with your utility.

7

you can also try this, it may work since your device is a TI50:

  1. gsctool -a -o to open the CCD
  2. gsctool -a -I AllowUnverifiedRo:always
  3. gsctool -a -w disable
  4. reboot
  5. run script
8

do I need to do this with the WP jumper in place? I just unsoldered the bridge and reassembled. lol

9

no