Windows 11 update 3/27/25 z390 Taichi Ultimate 7F

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   I had a Windows 11 update on 3/27/25 which green screened.
Upon restarting my pc I got a 7F bios code followed by an immediate reboot.
This loop continued until I powered down the system.

There was nothing on any screen, not even the bios loading display.

As far as I can tell it appears the windows update somehow fried my CPU!

z390 Taichi Ultimate
i9-9900k
32gb G.Skill TridentZ RAM

I tried all the usual tricks.
Pull the RAM, replace 1 at a time.
Removed graphics card and plugged in onboard.

Waiting on new CPU to arrive and hoping that works

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LeeB Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Aug 2016 Status: Offline Points: 46	Post Options Post Reply Quote LeeB Report Post Thanks(0) Quote Reply Topic: Windows 11 update 3/27/25 z390 Taichi Ultimate 7F Posted: 29 Mar 2025 at 1:37am
	I had a Windows 11 update on 3/27/25 which green screened. Upon restarting my pc I got a 7F bios code followed by an immediate reboot. This loop continued until I powered down the system. There was nothing on any screen, not even the bios loading display. As far as I can tell it appears the windows update somehow fried my CPU! z390 Taichi Ultimate i9-9900k 32gb G.Skill TridentZ RAM I tried all the usual tricks. Pull the RAM, replace 1 at a time. Removed graphics card and plugged in onboard. Waiting on new CPU to arrive and hoping that works

LeeB Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Aug 2016 Status: Offline Points: 46	Post Options Post Reply Quote LeeB Report Post Thanks(0) Quote Reply Posted: 29 Mar 2025 at 7:44am
	Update: Tried replacement CPU, still getting 7F. Only thing I could think of is BIOS but it appears this motherboard doesn't support the BIOS Flashback feature so there is no way to reload the BIOS since it doesn't even POST. Also noticed neither of the BIOS A nor BIOS B leds light up when trying to boot.