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Don994

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9 years ago

D

Don994

2 Posts

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1662

July 12th, 2017 14:00

Cannot downgrade BIOS from A17 to A16 on M4600

I'm trying to resolve an issue where my M4600 running WIndows10 will not go into Sleep mode.  It Hibernates instead.  This started after upgrading the BIOS to A17.  I have tried all combinations of settings in Advanced Power Mgmt.

Powercfg reports that the S1 state is not supported.  Thus I'm trying to go back to the previous BIOS version (A16).

When executing the bios executable (M4600A16.exe) from a bootable dos usb drive, the process upgrade begins, but never goes thru the update phase.  The laptop immediately reboots with no change to the bios.

Appreciate any suggestions.

  • T

    TheMoron1983

    2 Posts

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    Posted August 30th, 2017 06:00

    Yeah, BIOS A17 is a disaster.  The CPU fan fails to speed up to cool the CPU below 70C.  But going back to the previous ROM A16 is easy. Just use the windows .exe BIOS update files.(Do not use bootable DOS ones).

  • D

    Don994

    2 Posts

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    Posted September 13th, 2017 10:00

    Thanks for the suggestion, but I have the same issue when running the bios .exe updater from Windows. It starts, but ends (and restarts the PC) before any update occurs.  I've tried this in safemode too.

    Any suggestions?

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