• Lenovo Ideapad S340-15IWL Laptop Key stuck problem

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Lenovo Ideapad S340-15IWL Laptop Key stuck problem

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
  4. Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
  5. It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
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#1 Lenovo Ideapad S340-15IWL Laptop Key stuck problem

by cygron • 21 September 2025, 17:58
Model : Lenovo Ideapad S340-15IWL Type 81N8
Board id: EL5C3 EL531 EL431 LA-H101P REV 1.0

Problem is "q" Key is stuck and appear repeadely without Keyboard. I flash BIOS from supported original lenovo website and BIOS and EC version are changed. But problem still exits. There is nothing (Capacitor, Diode, etc ... ) on Keyboard circuit line. All are directetly connect with EC. Need help.

Re: Lenovo Ideapad S340-15IWL Laptop Key stuck problem

by Google Adsense [BOT] • 21 September 2025, 17:58

#2 Re: Lenovo Ideapad S340-15IWL Laptop Key stuck problem

by Vogelek23 • 21 September 2025, 22:35
Disconnect the keyboard while in the app (eg. Notepad) and check if "q" letter is still typed. If NOT, replace the keyboard. If SO, replace the EC.

#3 Re: Lenovo Ideapad S340-15IWL Laptop Key stuck problem

by cygron • 27 September 2025, 16:39
I already tested with disconnect keyboard. When i replace EC, can i need to reprogram?

#4 Re: Lenovo Ideapad S340-15IWL Laptop Key stuck problem

by matic • 29 September 2025, 08:20
If you will use a brand new KBC chip (or a erased one), it should automatically program itself the first time you connect the power supply to the board.

Re: Lenovo Ideapad S340-15IWL Laptop Key stuck problem

by Google Adsense [BOT] • 29 September 2025, 08:20
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