Why are my keys "f", "r", "4" and "5" not working?

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Lenovo IdeaPad Flex 5 14ARE05

This is the AMD Ryzen variant of the IdeaPad Flex 5. This page contains repair and maintenance information related to the Lenovo IdeaPad Flex 5 14ARE05.

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Student @student30949

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发帖于: 2024年2月12日

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Why are my keys "f", "r", "4" and "5" not working?

My laptop warranty expired about 2 years ago. I've had problems with keys "f", "r", "4" and "5" for a year now. These keys are next to each other. If I press one of those buttons let's say 10 seconds, the key usually starts working a little. If it doesn't start working, usually I press two of those buttons in turn and they usually start working. If the laptop fan starts making noise those buttons usually stop working. I have tried cleaning under the buttons but it didn't help. Is it possible that one certain electric circuit that responds to input from these buttons is malfunctioning? Is there some way to fix this? Thank you in advance :)

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Dave Empson @dce 声誉积分: 3.3千 33 4 4 · Answer 1 · 2024-02-12T11:05:33-07:00

Dave Empson @dce

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Generally speaking, when adjacent buttons on any keypad stop working it because of liquid ingress such as coffee or fizzy drinks either causing corrosion or dried out deposits. It can normally be cured by a full dismantle and clean, or in the case of bad corrosion, some new copper trace. All keyboards are different. You may be lucky and find a relevant repair on YouTube.

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Chihuahua6956 @chihuahua6956 声誉积分: 1 · Answer 2 · 2025-03-21T09:13:48-07:00

The issue here is not with keyboard unfortunately. The only solution that works, although temporary is this:

Unscrew the bottom lid of the laptop
Unplug the battery (you can unscrew it too to make it easier, but that's not necessary)
While battery is unplugged press the power button and hold it for 30 seconds
Plug battery again and see if it works - sometimes you have to repeat it

It works for completely random period of time, but at least it works (for me). It sounded stupid, but I was desperate and gave it a try. I have read somewhere that this trick removes some currents from the motherboard and somehow it works, but don't ask me why ;).

Hope that helps anyone!

Lenovo IdeaPad Flex 5 14ARE05

Why are my keys "f", "r", "4" and "5" not working?

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