Yaviks - CR50 write-protect not disabled after battery disconnect

Support
1

System Details

  • Device: yaviks (HP Chromebook 15.6" Plus)

  • OS: ChromeOS

  • Firmware Type: Stock

  • Firmware Version: Google_Yaviks_Ufs.15217.970.0

  • Internal storage type: UFS

Summary of the Issue Trying to install Linux (dual boot or full replacement). CR50 seems to block write-protect disable. Battery disconnect did not disable write-protect. Previously attempted dual boot which only resulted in a black screen on boot.

Steps to Reproduce

  1. Enabled Developer Mode

  2. Disconnected battery, ran on AC power only

  3. Attempted to run MrChromebox firmware utility script

  4. Write-protect still active, script blocked

Expected Behavior Battery disconnect should have disabled hardware write-protect on CR50, allowing firmware flash via MrChromebox script.

Any help appreciated.

2

that is not the expected behavior at all. Why do you think it should? My site does not list battery disconnect as a WP disablement method for your device.

3

That’s because the device you’re using, YAVIKS, doesn’t disable write protection through disconnecting the battery. As stated by the MrChromebox Supported Devices page, your Chromebook can only disable write protection through a Suzy-Q cable.

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