华硕ZenBook UX550VD笔记本键盘部分按键输出字符异常求助

Hey there, let's work through this keyboard issue on your ZenBook UX550VD. The symptoms you're describing—keys outputting the wrong characters unless you hold Fn—point to a few common fixes we can try, starting with the simplest:

1. Toggle Fn Lock (Most Likely Fix) #

Asus laptops use Fn Lock to switch between two input layers for certain keys. Right now, it sounds like your system is defaulting to the secondary character layer instead of the primary one. Here's how to switch it back:

• Look for the Fn Lock icon (usually a lock with "Fn" inside) on one of your function keys (F1-F12) or the Esc key.
• Press Fn + [that key] (often Fn + Esc on ZenBooks) to toggle the lock. You should see an on-screen notification if your laptop supports it, confirming the change.
• Test the problematic keys again—they should now output their correct primary characters without holding Fn.

2. Perform a Hardware Reset (Discharge Static) #

Static buildup can sometimes cause keyboard glitches, even in BIOS. Try this:

• Shut down your laptop completely, unplug the power adapter. Since the UX550VD has a built-in battery, you can skip removing it.
• Hold down the power button for 30 seconds to discharge any residual static.
• Plug the adapter back in, then power on the laptop and test the keyboard.

3. Adjust BIOS Keyboard Settings #

Since the issue persists outside Windows, let's check the BIOS for keyboard behavior settings:

• Restart your laptop and press F2 or Del repeatedly as it boots to enter the BIOS menu.
• Look for an option like "Fn Key Behavior", "Function Key Priority", or similar (it might be under the "Advanced" tab).
• Change the setting to prioritize the primary key functions (e.g., select "Function Key First" instead of "Multimedia Key First"—the exact wording varies by BIOS version).
• Save changes and exit the BIOS (usually F10), then boot back into Windows to test.

4. Rule Out Hardware Failure #

If none of the above fixes work, the issue might be a hardware problem:

• Connect an external USB keyboard to your laptop. If the external keyboard works correctly, the problem is isolated to your built-in keyboard.
• Possible hardware issues include a loose keyboard ribbon cable or faulty key matrix. For this, you'll need to either contact Asus support for repair or (if you're comfortable with hardware work) open the laptop to check the cable connection (note: this will void your warranty if it's still active).

内容的提问来源于stack exchange，提问作者user3384674