Display & Audio guides
Fix what you see and hear: undetected monitors, flickering screens, silent speakers, crackling sound, and microphone problems.
Where to begin
Begin with the physical checks: the cable is fully seated, the monitor is on the right input, and the correct output is selected in the sound menu on the taskbar. Many no-signal and no-sound problems end here.
Next, find out whether the fault follows the hardware. Try another cable, port, or pair of headphones. If the problem moves with the device, replace it. If it stays with the PC, look at drivers, and roll back the latest one if the trouble began right after an update.
For a flickering screen, open Task Manager. If it flickers along with everything else, suspect the display driver. If it stays steady, suspect an app.
Start here
- How to Fix No Audio or Sound in Windows 11
Speakers or headphones silent on Windows 11 or 10? Follow these step-by-step troubleshooting fixes to restore PC audio: drivers, devices, services.
- How to Fix a Second Monitor Not Detected in Windows 11
Second monitor not detected on Windows 11? Fix it with the Extend display setting, HDMI/DisplayPort cable checks, GPU ports, dock drivers, and ghosts.
- How to Fix Screen Flickering or Flashing in Windows 11
Monitor flashing black, horizontal lines, or desktop flicker in Windows 11? Test in Task Manager, fix refresh rate mismatch, and roll back bad GPU drivers.
- How to Fix a Microphone Not Working in Windows 11
Mic not working in Teams, Zoom, or Discord on Windows 11? Fix the default input device, privacy permissions, mic levels, and per-app sound settings.
More guides (44)
- Fix External Hard Drive Not Showing Up in Windows 11
External drive not showing in File Explorer? Check Disk Management, assign a drive letter, fix USB power and drivers, and avoid the prompts that erase data.
- How to Choose a Power Supply (PSU) for Your PC
How many watts you actually need, what 80 Plus ratings mean, ATX 3.1 and the 12V-2x6 GPU connector, modular cables, and the PSU mistakes that damage hardware.
- How to Fix a 144Hz Monitor Stuck at 60Hz in Windows 11
High refresh rate monitor stuck at 60Hz on Windows 11? Set the refresh rate, use the right cable and GPU port, change monitor OSD settings, and fix the driver.
- How to Fix Blurry Text and Wrong Resolution in Windows 11
Fuzzy text or blurry apps on Windows 11? Set native resolution, fix display scaling, tune ClearType, override DPI per app, and fix TVs used as monitors.
- Fix Bad Bluetooth Headphone Sound Quality in Windows 11
Bluetooth headphones sound muffled, tinny, or like a phone call on Windows 11? Switch to stereo mode, stop the hands-free profile, and fix choppy audio.
- How to Fix PFN_LIST_CORRUPT in Windows 11
PFN_LIST_CORRUPT means Windows' index of physical memory pages was damaged. Test the RAM first, then the storage driver: here is the order that works.
- How to Fix a Discord Mic Not Working in Windows 11
Nobody can hear you on Discord in Windows 11? Fix input device selection, exclusive mode, privacy permissions, and push-to-talk and voice settings.
- How to Enter BIOS or UEFI Settings in Windows 11
Need to change boot order, enable TPM, or turn off XMP? Here is how to enter BIOS or UEFI on Windows 11 from inside Windows and with the setup key at startup.
- How to Clone a Hard Drive to an SSD in Windows 11
Move Windows 11 to a new SSD without reinstalling. Prepare the drive, clone the whole disk, fix the boot order, and verify the result step by step.
- How to Check Laptop Battery Health in Windows 11
Generate a Windows 11 battery report to compare real capacity against design capacity, judge how much life is left, and decide whether to replace it.
- How to Fix WHEA_UNCORRECTABLE_ERROR in Windows 11
WHEA_UNCORRECTABLE_ERROR means hardware reported a fault Windows can't recover from. Isolate RAM, CPU, drive, or overclock with these ordered tests.
- Fix NVIDIA Control Panel Missing in Windows 11
NVIDIA Control Panel missing from the right-click menu or won't open in Windows 11? Restore it from the Store, restart its services, or reinstall the driver.
- How to Fix Mouse Lag and Stuttering in Windows 11
Mouse pointer skipping, freezing, or lagging in Windows 11? Fix wireless interference, polling and power settings, drivers, and surface problems.
- Fix Display Driver Stopped Responding in Windows 11
Screen goes black, then "display driver stopped responding and has recovered"? Fix the TDR timeout, unstable GPU clocks, and power settings behind it.
- How to Fix CLOCK_WATCHDOG_TIMEOUT in Windows 11
CLOCK_WATCHDOG_TIMEOUT means a CPU core stopped responding. Fix unstable overclocks, bad drivers, and cooling faults with these step-by-step checks.
- How Much RAM Do I Need? A Practical Guide
8GB, 16GB, or 32GB? Work out how much RAM you actually need for browsing, gaming, or creative work, check what you have, and upgrade without wasting money.
- How to Fix USB Device Not Recognized in Windows 11
USB device not recognized or showing as Unknown Device in Windows 11? Reset USB controllers, fix power settings, and get the device detected again.
- How to Fix Loud Fan Noise on a Windows 11 PC
PC or laptop fans running loud and constant? Find what's loading the CPU, clean the cooling path, and fix fan curves with these step-by-step quieting fixes.
- How to Fix a Laptop Plugged In but Not Charging
Laptop says plugged in, not charging in Windows 11? Test the adapter, reset the battery driver, check charge limits, and fix the port step by step.
- How to Fix Audio Services Not Responding
Troubleshooter says "Audio services not responding" in Windows 11? Restart the audio services, reset permissions, and get sound back step by step.
- How to Fix 100% CPU Usage in Windows 11
CPU stuck at 100% and your PC crawling? Find the process eating your processor, stop background hogs, and cool a throttling CPU with these step-by-step fixes.
- How to Fix HDR Not Working in Windows 11
HDR toggle missing, colors look washed out, or games won't enable HDR? Fix display cable, GPU settings, Windows HDR calibration, and monitor compatibility.
- How to Fix Game Controller Not Working in Windows 11
Controller not detected or buttons dead in games? Fix Windows drivers, USB ports, Steam Input, and game controller settings.
- How to Fix Brightness Not Working on Windows 11
Brightness slider missing, greyed out, or won't change on Windows 11? Re-enable the display driver, fix adaptive brightness, and restore the controls.
- How to Fix Crackling or Popping Sound on Windows 11
Audio crackling, popping, or stuttering on Windows 11? Fix the sample rate, turn off audio enhancements, and stop the driver latency behind the static.
- How to Fix Windows Hello (Face/Fingerprint) Not Working
PIN works but face or fingerprint won't enroll or sign in? Update drivers, reset Hello, check BIOS TPM, and fix camera privacy settings on Windows 11.
- How to Fix Windows 11 Touchpad Not Working on a Laptop
Touchpad frozen, disabled, or gestures gone on Windows 11? Turn off accidental disable keys, reinstall precision drivers, and fix BIOS touchpad settings.
- How to Fix a PC That Won't Turn On
Press power and nothing happens, no fans, no lights, or it shuts off instantly? Check outlet, PSU, RAM, and front-panel wiring before replacing parts.
- How to Fix Keyboard Not Typing in Windows 11
Keyboard dead in Windows but works in BIOS? Fix filter keys, language layout, USB power saving, and drivers, or use the on-screen keyboard to sign in.
- How to Fix Headphones Not Detected in Windows 11
Sound plays through the monitor instead of headphones, or the 3.5 mm jack is ignored? Fix default output, jack detection, and Realtek audio on Windows 11.
- How to Fix USB Ports Not Working in Windows 11
USB mouse, flash drive, or phone not detected in Windows 11. Try different ports, reset controllers, update chipset drivers, and fix power management.
- How to Check and Upgrade RAM in Your PC
Find out if your PC has free RAM slots, which DDR type you need, and how to install sticks without breaking clips, before you buy the wrong kit.
- How to Enable TPM 2.0 and Secure Boot for Windows 11
PC Health Check failed for the Windows 11 upgrade? Turn on TPM 2.0, Secure Boot, and UEFI in your BIOS so the install completes on supported hardware.
- How to Fix No Bootable Device Errors on Windows 11
No bootable device or OS not found on Windows 11? Fix boot order in BIOS and repair the bootloader with bcdboot or recovery.
- How to Fix a Laptop Battery Draining Fast in Windows 11
Laptop battery dying in 1–2 hours on Windows 11? Check battery health, power mode, and the apps quietly draining charge, and fix the worst offenders.
- How to Fix a Black Screen on Boot in Windows 11
Monitor stays black when the PC powers on, no BIOS, no login, or just a cursor? Cable checks, GPU swaps, driver rollback, and Windows boot recovery.
- How to Fix a Printer Showing Offline in Windows 11
Windows 11 printer stuck offline or jobs stuck in queue? Set the printer online, clear the print spooler, reinstall the driver, and fix Wi-Fi printer IPs.
- How to Check Your PC Specs on Windows 11
Find your CPU, RAM, GPU, motherboard, and storage on Windows 11 using Settings, Task Manager, dxdiag, and System Information, no extra software needed.
- How to Fix Bluetooth Not Working in Windows 11
Bluetooth missing, won't pair, or headphones connect on Windows 11 with no sound? Restart Bluetooth services, update drivers, and re-pair devices fast.
- How to Fix a Webcam Not Working in Windows 11
Webcam stays black in Teams or Zoom on Windows 11? Fix camera privacy settings, the Fn-key shutter, drivers, and the right device selected in the app.
- How to Clean Your Laptop and Devices Safely
Dust, grime, and sticky keys hurt performance and hygiene. How to safely clean your laptop, phone, and screens without damaging them.
- How to Choose an SSD for Your PC (SATA vs NVMe)
Buying an SSD for your PC? Understand SATA vs NVMe, M.2 vs 2.5-inch, capacity, and DRAM so you pick the right drive and actually feel the speed boost.
- The Best PC Upgrades to Speed Up an Old Computer
The best upgrades to speed up an old PC, ranked by impact (SSD, RAM, cleanup, and cooling) plus how to know when it's smarter to replace the machine.
- How to Fix CPU Overheating and Thermal Throttling
PC fans revving loud or games suddenly stuttering on Windows? Diagnose and fix CPU overheating and thermal throttling with temps, paste, and airflow.