PC Shows No Signal After Driver Update: Mouse and Keyboard Won't Work

When a PC displays no signal after a driver update, the issue often stems from corrupted graphics drivers or peripheral conflicts preventing the system from initializing properly. To resolve this, you should boot into Safe Mode to access Device Manager, where you can roll back the problematic display driver and disconnect non-essential USB devices to isolate whether the keyboard and mouse failure is causing the black screen or if it is purely a video output error.

Immediate Troubleshooting Steps

The most critical first step is determining if the computer is actually running. If the fans are spinning and lights are on but the monitor shows "No Signal," the operating system may have failed to initialize the display adapter correctly due to the recent update. In many cases, the keyboard and mouse will also become unresponsive because their drivers (often part of the chipset or USB controller suite) are tied to the same system stability as the GPU. You must attempt to enter Safe Mode. This mode loads Windows with a minimal set of drivers, bypassing the newly installed software that is likely causing the conflict. To do this, force your computer to shut down by holding the power button for ten seconds. Turn it back on, and immediately begin tapping the F8 key (or Shift + Restart if you can access the login screen via another method) to trigger the Advanced Startup Options. Once in Safe Mode, the screen should display normally because it uses a basic Microsoft Basic Display Adapter rather than the specific manufacturer driver that just failed.

Rolling Back Graphics Drivers

If you successfully reach the desktop in Safe Mode, the next priority is to revert the graphics card settings. The "No Signal" output is almost always caused by the NVIDIA, AMD, or Intel graphics driver failing to handshake with the monitor during the boot sequence. Open the Start menu and type "Device Manager." Expand the "Display adapters" section. Right-click on your current graphics card (e.g., NVIDIA GeForce RTX or AMD Radeon) and select "Properties." Navigate to the "Driver" tab. You will see a "Roll Back Driver" button. If this button is grayed out, it means there is no previous version stored, and you will need to uninstall the device entirely. Click "Uninstall Device," check the box that says "Attempt to remove the driver for this device," and then restart your computer. Windows will automatically install a generic driver upon reboot, which should restore the video signal. Once the signal returns, you can download the latest stable driver from the manufacturer’s website, but avoid using "Beta" versions or automatic update tools that might push unstable builds. It is safer to manually download the installer and perform a clean installation.

Addressing Peripheral Conflicts

The prompt mentions that the mouse and keyboard are not working. While these are often symptoms of a broader system freeze, they can sometimes be the root cause if the USB controllers are crashing. If rolling back the graphics driver does not restore the signal, the issue may lie with the motherboard's chipset drivers, which manage USB communication. In Safe Mode, open Device Manager again and look for "Universal Serial Bus controllers." If you see any devices with a yellow exclamation mark, right-click them and select "Update driver." Alternatively, disconnect all USB peripherals except one essential mouse and keyboard. Sometimes, a faulty hub or a specific gaming peripheral with aggressive RGB software can crash the USB stack, leading to a frozen state that appears as a black screen. For users experiencing persistent input issues, checking specific hardware compatibility is vital. As noted in our guide on Multi-Staff: Mouse Cursor Losing Focus/Keyboard Dropping Typing, driver conflicts can manifest differently depending on the user profile and background processes. Similarly, if you are using specialized input devices, refer to Fixing Logitech G102 Mouse and G610 Keyboard Issues on Windows 11 to ensure no conflicting macro software is interfering with system initialization.

Checking Motherboard and BIOS Settings

If software solutions fail, the problem might be deeper within the firmware. A driver update can sometimes trigger a BIOS reset or reveal underlying hardware instability. Ensure that your primary monitor is plugged into the dedicated graphics card port, not the motherboard HDMI/DisplayPort, unless you are using integrated graphics exclusively. Accessing the BIOS requires pressing Del or F2 during startup. If you cannot see the BIOS screen either, try reseating the RAM sticks and the graphics card. Poor contact can cause POST failures that mimic driver issues. For ASRock motherboard users, specific LED indicators can help diagnose these failures. Refer to ASRock H610M-HVS Motherboard Upgrade for insights on interpreting motherboard debug LEDs, which can tell you if the system is hanging at memory training or GPU initialization. Finally, consider disabling fast startup in Windows. This feature saves the kernel state to disk, which can carry over corruption from one session to the next. Go to Control Panel > Power Options > Choose what the power buttons do, and uncheck "Turn on fast startup." This forces a full cold boot every time, clearing temporary driver states that may be causing the loop.

Preventing Future Occurrences

To avoid this situation in the future, use System Restore points before major driver updates. Create a restore point in the System Properties menu before installing new GPU or chipset drivers. This allows you to snap back to a known good state instantly if the update breaks the video output. Additionally, keep an old copy of your last known working driver on a separate drive or cloud storage, so you are not reliant on Windows Update to fetch a potentially broken version.

Frequently Asked Questions

Why does my monitor show no signal even though the PC is on?

This happens when the operating system fails to initialize the display adapter, often due to a corrupt or incompatible graphics driver. The computer powers on and runs, but it cannot send a video signal to the monitor because the handshaking protocol between the GPU and the display has failed.

Can a bad keyboard driver cause a black screen?

While rare, a corrupted chipset or USB controller driver can freeze the entire system during boot, resulting in a black screen and unresponsive peripherals. This is usually accompanied by the inability to enter the BIOS or receive keyboard input at the login screen.

How do I enter Safe Mode if I can't see the screen?

You can force Windows into Automatic Repair mode by interrupting the boot process three times. Turn the PC on, and as soon as you see the manufacturer logo, hold the power button to force a shutdown. Repeat this twice more; on the third boot, Windows will detect the failure and load the repair environment where you can navigate to Safe Mode.

What should I do if the Roll Back Driver option is grayed out?

If the option is unavailable, it means Windows does not have a backup of the previous driver version. In this case, you must uninstall the current device in Device Manager and allow Windows to reinstall a generic Microsoft driver, or manually download an older stable version from the manufacturer's archive.

Is it safe to use a different HDMI cable?

Yes, swapping cables is a safe diagnostic step. A damaged cable can cause signal loss that mimics driver errors, especially if the high bandwidth required by modern GPUs is not being met by a faulty wire. Always test with a known-good, high-speed HDMI or DisplayPort cable before assuming a driver fault.