Hi everyone i have some problem with probook 4431s. Its problem is touchpad and keyboard works in bios and doesnt works in windows or windows setup time. Only it works bios setup screen. is it bios related problem pls help me.
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Re: Probook 4431s keyboard and touchpad problem.
Try reflash bios...reinstall driver...(of course with external)...if neither works, replace SIO... -
Re: Probook 4431s keyboard and touchpad problem.
i think its not sio problem, because touchpad n keyboard works in bios. so problem may be bios. but i have not this bios if anyone have this please give it to me. Thank You.........Comment
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Re: Probook 4431s keyboard and touchpad problem.
Many times SIO replacement solved touchpad for me...
Sometimes touchpad & keyboard worked even in windows for 5-10 min & then stopped...
As far as I know BIOS has nothing to do with Keyboard & Touchpad...Comment
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Re: Probook 4431s keyboard and touchpad problem.
Try this 1...
I've extracted it from HP website...
Don't forget to compare hex with your original...
Untested so do it on your own risk...
But before...I would flash it from dos or windows...
F.41 VersionLast edited by loser18; 05-23-2014, 10:25 AM.Comment
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Re: Probook 4431s keyboard and touchpad problem.
Does it work on boot cd environment?Comment
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Hi everyone,
I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.
🛠 Original Issue
The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.
I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.
⚠️ New Problem: One USB-C Port Only Works in One Orientation... -
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