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VirtualBoost

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6 years ago

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June 27th, 2020 20:00

m15 R2, can't downgrade BIOS, #3

Hello!

As many other people's have mentioned in this forum, I too can no longer undervolting after updating BIOS to the latest version. This is very troublesome for me as the CPU overheats when I can't undervolt. As of such, I have attempted to initiate a BIOS recovery by doing the same procedure as @thomaskeano suggested in his thread:

From: m15 downgrade from BIOS 2.0.4
 

So I've managed to downgrade it using the BIOS Recovery. One of the admin gave me these steps, I was trying to do it before, but couldn't get it to work. This time, I had secure boot in bios disabled, don't know if that helped but pretty much follow this and in the recovery screen, select BIOS Rollback and that will flash the previous version you had installed.

How to Initiate BIOS Recovery

  1. Verify that the device is powered OFF and disconnect the AC adapter or power source.
  2. Press and hold the CTRL key + ESC key on the keyboard (Ensure primary Battery is 30% charge)
  3. Plug in the AC adapter or power source to the device.
  4. Release the CTRL key + ESC key on the keyboard.
  5. Select Rollback BIOS in the BIOS Recovery and press the Enter key to start the recovery process."

However, when I release CTRL key and ESC key when it is turned after doing everything until that step, nothing happens. BIOS Recovery isn't started as it should. Therefore, this option doesn't seem to work anymore. How do I go on about to downgrading the BIOS without this step working?

Best regards,
VirtualBoost