If the XPS 13 9350 keyboard works in Dell’s pre-boot diagnostics, the fault is Windows-side; if it fails there, plan on hardware service.
A laptop you can’t type on is an expensive brick, and the reflex fix — reinstalling the keyboard driver — is often the wrong move. Before you touch a driver, run the one test that settles most Dell XPS 13 9350 keyboard not working troubleshooting: does the keyboard respond in Dell’s pre-boot diagnostics, or does it quit only after Windows loads?
That result sorts the job in two. A keyboard that works before Windows starts has working hardware, which puts the cause in Windows settings, the keyboard driver, or firmware. A keyboard that stays silent through diagnostics has a hardware problem — the keyboard itself, its ribbon connector, or the system board behind it.
Keyboard Not Working On The XPS 13 9350: Is It Software Or Hardware?
The built-in keyboard is a software problem until diagnostics prove otherwise. Dell’s pre-boot test runs below Windows, so it shows whether the hardware can still register a keystroke.
Save your work, close your applications, unplug unnecessary peripherals, and restart. Tap F12 at the Dell logo to reach the one-time boot menu, then choose Diagnostics. A working keyboard answers as the test runs; a keyboard that does nothing here has already told you where the problem sits. The owner’s manual also documents a motherboard built-in self-test whose error codes are worth writing down.
A USB keyboard is the cheapest second opinion. Plug one into a USB-C or USB-A port; if it types while the built-in keyboard stays silent, the fault is narrowed to the laptop’s own keyboard, its connector, or the parts around it.
| Diagnostic Result | What It Means | Next Move |
|---|---|---|
| Types in pre-boot diagnostics | Hardware registers input; Windows, firmware, or the driver is at fault | Work through the Windows fixes |
| Silent in diagnostics | Keyboard, ribbon cable, or system board fault | Start a service request |
| USB keyboard works, built-in doesn’t | Fault narrowed to the built-in keyboard or its connector | Run the SupportAssist test, then service |
| Wrong characters or an altered Fn row | Keyboard layout or function row setting | Check layout and press Fn+Esc |
| A few keys dead, the rest fine | Individual switch or membrane damage | Key test, then service |
| Drops out after sleep | Driver or firmware interruption | Reinstall the driver, update BIOS |
Windows-Side Fixes, In The Order They Pay Off
Start with a true restart, then run the Windows keyboard troubleshooter, then let SupportAssist check drivers and BIOS before you uninstall anything by hand. Dell’s documented order runs from least destructive to most.
- Restart properly. Dell lists a restart among the first keyboard fixes, and closing the lid is not the same thing.
- Run the keyboard troubleshooter. Open Settings, then Update & Security on Windows 10 or System > Troubleshoot on Windows 11, and run Keyboard under “Find and fix other problems.” Menu names differ between versions.
- Run the SupportAssist keyboard test. Open SupportAssist, select Troubleshooting, and start the keyboard test. It asks you to press each key, so run it on the built-in keyboard, not a plugged-in one.
- Reinstall the keyboard driver. Open Device Manager, expand Keyboards, right-click each entry, choose Uninstall device, and restart. Windows reinstalls the drivers it needs on the next boot.
- Update BIOS and drivers. SupportAssist checks for driver and firmware updates, installs them, and may request a restart. Never power off while a BIOS update is running.
Dell’s keyboard usage and troubleshooting guide lists this same sequence and adds the online diagnostics you can run from the support site.
Success looks like a keyboard that types immediately after the restart and still types through a sleep-and-wake cycle. If it dies again on resume, the driver reinstall or the BIOS update is the step that was still pending.
When The Keyboard Fails Before Windows Loads
A keyboard that is silent in pre-boot diagnostics needs service, not software. That test runs without Windows, so total failure there points at the keyboard assembly, its ribbon cable, or the system board.
Two moves make it worse. Installing drivers built for a different XPS generation or a different keyboard layout adds a second fault on top of the first, so pull files from the XPS 13 9350 support page and match your service tag where you can. And don’t pry at the keys — when every key is out, the switch under one cap isn’t the cause.
Rule out configuration first. The XPS 13 9350 uses a backlit keyboard where Shift reaches alternate characters and Fn reaches secondary functions, and Fn+Esc swaps the function row between media and standard behavior. Wrong characters and a stubborn function row are settings, not failure.
If the hardware is out, a replacement beats a new laptop. Our tested XPS 13 9350 keyboard roundup covers what fits and what doesn’t.
When diagnostics confirm failure, open a service request with the service tag and the exact diagnostic error code in hand. That pairing moves a repair faster than any description of symptoms.
Common Questions
Does A Failed Windows Keyboard Test Mean The Keyboard Is Dead?
No. A troubleshooter or SupportAssist test that runs inside Windows only proves Windows can’t see the keyboard properly. Dell’s pre-boot diagnostics run below the operating system, which gives the cleaner software-versus-hardware answer. Treat a Windows-side failure as a driver or configuration problem until pre-boot testing fails as well.
Will A BIOS Update Fix A Keyboard That Stopped Working?
Sometimes. A firmware update can restore a keyboard that drops out after sleep or resume, which is why Dell’s sequence includes SupportAssist driver and BIOS updates before hardware service. It will not repair a keyboard that is already dead in pre-boot diagnostics. Let the update finish — interrupting a BIOS flash can brick the machine.
Why Do Some Keys Type The Wrong Characters?
Usually a layout mismatch rather than a hardware failure. Windows may be set to a different keyboard layout than the one printed on the keys, and this backlit keyboard puts alternate characters on Shift and secondary functions on Fn. Press Fn+Esc to check function row behavior, then confirm the input language in Windows settings.
Sources
- Dell. “Keyboard Troubleshooting and Usage: The Definitive Guide” Supports the restart-first order, the Windows keyboard troubleshooter, the SupportAssist key test, and driver reinstallation.
- Dell. “Keyboard Not Working: USB, Bluetooth, or Wireless Keyboards” Supports SupportAssist driver and firmware updates and automatic driver reinstallation after restart.