Tooltern guidesPlain-words fixes for developer errors and everyday tech puzzles.https://tooltern.oddlathe.com/guides/feed.xml2026-11-12T00:00:00ZTooltern Laptop or PC sound crackling, popping or distorted? How to fix ithttps://tooltern.oddlathe.com/guides/laptop-speakers-crackling-distorted-sound2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy sound from laptop or PC speakers crackles, pops or distorts, and how to tell a software problem from a damaged speaker: the headphone test, audio enhancements, sample rate and exclusive mode, maker audio apps, drivers, DPC latency under load, power settings, Bluetooth interference and too much volume. Keyboard keys not working, or sticky after a spill? Fixes for laptops and PCshttps://tooltern.oddlathe.com/guides/keyboard-keys-not-working-sticky-after-spill2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a whole keyboard or just some keys stop working, and what to do after a spill: the first 60 seconds, drying and cleaning without making it worse, Filter Keys and other settings that make keys seem dead, Fn and Win lock, drivers, and testing whether it's the keyboard or Windows. Laptop not charging over USB-C, or "slow charger"? What to checkhttps://tooltern.oddlathe.com/guides/laptop-not-charging-usb-c-slow-charger2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a laptop won't charge, or charges slowly, from a USB-C charger: the charger's wattage and Power Delivery, the right USB-C port, the cable's 3 A or 5 A rating, docks and monitors that keep some power, phone chargers, battery charge limits, and dirty or worn ports. Laptop touchpad not working or cursor jumping? Fixes for Windows and Machttps://tooltern.oddlathe.com/guides/touchpad-not-working-cursor-jumping-laptop2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a laptop touchpad stops working or the cursor jumps around, in the order that fixes most cases: the touchpad key and settings switch, the mouse-connected option, drivers, scrolling and gesture settings, sensitivity and palm rejection, dirt and damp fingers, chargers that make it erratic, Mac trackpad settings, and the swollen-battery warning sign. Keyboard typing the wrong characters? @ and “ swapped, # instead of £, numbers instead of lettershttps://tooltern.oddlathe.com/guides/keyboard-typing-wrong-characters-at-sign-quotes-swapped2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a keyboard types the wrong symbols or letters and how to fix it: UK vs US layouts (@ and " swapped, # and £), the Alt+Shift and Win+Space shortcuts that switch layout, numbers instead of letters from Num Lock, overtype from the Insert key, Sticky and Filter Keys, Fn and Win lock, Mac input sources and the sign-in screen. Microphone not working on PC or Mac? Fixes for Teams, Zoom, Discord and headsetshttps://tooltern.oddlathe.com/guides/microphone-not-working-windows-mac2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy people can't hear you, in the order that fixes most cases: mute switches and mic keys, choosing the right input device, Windows and macOS microphone permissions, the app's own device setting, disabled recording devices, levels and enhancements, 3.5 mm headset jacks and splitters, Bluetooth headset mode and drivers. Webcam not working? Fixes for laptop and USB cameras on Windows and Machttps://tooltern.oddlathe.com/guides/webcam-not-working-windows-mac2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a laptop or USB webcam shows nothing, in the order that fixes most cases: privacy shutters and camera keys, Windows and macOS camera permissions, another app holding the camera, browser site permissions, choosing the right camera, drivers in Device Manager, antivirus webcam blocking and USB problems. Bluetooth headphones sound terrible on calls? Headset mode, the microphone trade-off and fixeshttps://tooltern.oddlathe.com/guides/bluetooth-headphones-sound-bad-on-calls-headset-mode2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy Bluetooth headphones drop to tinny, muffled phone-call quality the moment you use their microphone on a PC (the headset / hands-free profile), and the fixes: use a separate mic, pick the right playback device, newer codecs like LE Audio and wideband speech, dongles, and turning off hands-free so music stays good. Laptop overheating or slowing down when hot? Thermal throttling explained and fixedhttps://tooltern.oddlathe.com/guides/laptop-overheating-thermal-throttling-fix2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy laptops get hot and slow down (thermal throttling), what temperatures are normal, how to check, and the fixes in order: hard surfaces, background processes, dust, power modes and fan profiles, frame-rate caps, cooling pads, and replacing dried thermal paste on older machines. HDMI “No signal” on a TV or monitor? Fixes for PCs, laptops, consoles and boxeshttps://tooltern.oddlathe.com/guides/hdmi-no-signal-tv-monitor-fix2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhat a “No signal” message really means and how to fix it, from the input and power-cycle order to the cable, the port, HDCP handshake problems, resolution the screen can't show, PS5 and Xbox video resets, soundbars and receivers in the chain, and a PC that isn't actually booting. Second monitor not detected? Fixes for Windows, Mac, docks and USB-Chttps://tooltern.oddlathe.com/guides/second-monitor-not-detected-windows-mac2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a second or external monitor isn't detected, in the order that fixes most cases: the input and Win+P mode, cables and ports, USB-C ports that don't carry video, docks and DisplayLink, graphics drivers, Mac limits on how many screens a chip can drive, and resetting the display settings. PC or laptop making a noise? Fan, coil whine, clicking, grinding or beeping, and what each meanshttps://tooltern.oddlathe.com/guides/pc-laptop-making-noise-fan-coil-whine-clicking-grinding2026-11-12T00:00:00Z2026-11-12T00:00:00ZIdentify a computer noise by sound and when it happens: loud or revving fans, rattles, the high-pitched squeal of coil whine, clicking or grinding drives and startup beeps, with what's harmless, what to fix, and when to back up your files right now. PS5 or Xbox HDR looks washed out or too dark? TV and console settings that fix ithttps://tooltern.oddlathe.com/guides/ps5-xbox-hdr-washed-out-or-too-dark2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy HDR on a PS5 or Xbox Series X|S looks grey, dim or crushed, and the fixes in order: the TV's enhanced HDMI setting, picture mode and energy saving, the console's HDR calibration, tone mapping (HGIG), RGB range and colour space, the cable, and when a TV just isn't bright enough for HDR. Monitor stuck at 60 Hz? Why 144 Hz or 165 Hz is missing and how to fix ithttps://tooltern.oddlathe.com/guides/monitor-stuck-at-60hz-144hz-option-missing2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a high-refresh monitor only offers 60 Hz, checked in the order that fixes most cases: the Windows setting, the cable and port, plugging into the motherboard instead of the graphics card, adapters and docks, graphics drivers, the monitor's own menu and the resolution-bandwidth limit. SSD slower than advertised? Why speed tests and big copies fall shorthttps://tooltern.oddlathe.com/guides/ssd-slower-than-advertised2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a new SSD or NVMe drive benchmarks or copies well below the box figure: the PCIe slot and lanes, SATA and USB limits, the SLC cache running out on big copies, QLC and DRAM-less drives, heat, a full drive and TRIM, plus how to test it properly. Fake USB stick or SD card? How to test the real capacity (and what to do)https://tooltern.oddlathe.com/guides/fake-capacity-usb-stick-sd-card-test2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a cheap "2 TB" stick or microSD card shows the full size but loses files, how to test the real capacity with H2testw, f3 or ValiDrive on Windows, Mac and Linux, and what you can (and can't) do with a fake one. Not receiving text messages (iPhone or Android)? Causes and fixes, in orderhttps://tooltern.oddlathe.com/guides/not-receiving-text-messages-iphone-android2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy texts stop arriving, from everyone, from one person or only verification codes, and the fixes in the order that solves most cases: signal and Wi-Fi Calling, blocked and filtered senders, full storage, iMessage after switching to Android, RCS, the message centre number and the network. HDR looks washed out or dull on Windows? Why, and how to fix ithttps://tooltern.oddlathe.com/guides/hdr-looks-washed-out-windows-pc2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy turning on HDR in Windows makes the desktop look grey and flat, and how to fix it: SDR content brightness, the Windows HDR Calibration app, game HDR sliders, full vs limited RGB, cables and colour depth, and when an HDR400 monitor is better left in SDR. Game stutters even though FPS is high? Frame pacing, shader stutter and how to fix ithttps://tooltern.oddlathe.com/guides/game-stutters-even-with-high-fps-frame-pacing2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a game can say 60, 100 or 144 FPS and still feel choppy: uneven frame times, V-Sync on a fixed-rate screen, shader compilation, asset streaming, full VRAM and background tasks. How to measure it with a frame-time graph and fix each cause. Screen tearing: what causes it and how to fix it (PC, console, video)https://tooltern.oddlathe.com/guides/screen-tearing-how-to-fix2026-11-12T00:00:00Z2026-11-12T00:00:00ZWhy a horizontal split line appears across the picture when things move, and the fixes in the order that works: VRR (G-Sync / FreeSync), V-Sync, a frame cap, Fast Sync / Enhanced Sync, plus tearing in browser video, on a second monitor and on Linux. Why do speed tests give different results? Speedtest vs Fast.com vs your provider's testhttps://tooltern.oddlathe.com/guides/speed-test-results-different-on-each-site2026-11-11T00:00:00Z2026-11-12T00:00:00ZWhy the same connection gets different numbers on Speedtest, Fast.com, Google's test, Cloudflare and your provider's own checker: test server location, number of connections, Wi-Fi and device limits, protocol overhead and time of day, plus how to run a test you can trust. "The disk is write-protected": how to fix a USB stick or SD card you can't write tohttps://tooltern.oddlathe.com/guides/usb-stick-sd-card-write-protected-fix2026-11-11T00:00:00Z2026-11-12T00:00:00ZWhy Windows, Mac or Linux says a USB stick or SD card is write-protected, and how to fix it: the lock switch, diskpart's read-only attribute, the WriteProtect registry setting, removable-storage policies, and how to tell when the card has worn out and gone read-only for good. How to clone a hard drive to an SSD (and fix a clone that won't boot)https://tooltern.oddlathe.com/guides/clone-hard-drive-to-ssd-windows-mac2026-11-11T00:00:00Z2026-11-12T00:00:00ZA step-by-step way to move Windows (or a Mac or Linux system) from an old hard drive to an SSD without reinstalling: checking it fits, what to connect, which partitions to copy, swapping drives, and fixing the usual problems like a clone that won't boot or missing space. How much broadband speed do I need? A simple household calculationhttps://tooltern.oddlathe.com/guides/how-much-broadband-speed-do-i-need2026-11-11T00:00:00Z2026-11-11T00:00:00ZWork out the download and upload speed your household actually needs: Mb/s per activity (HD and 4K streaming, video calls, gaming, browsing), how to add up what happens at the same time, how much headroom to leave, worked examples from one person to a busy family, and when faster plans stop helping. What is a contention ratio? How broadband is shared, explained simplyhttps://tooltern.oddlathe.com/guides/what-is-a-contention-ratio-broadband2026-11-11T00:00:00Z2026-11-11T00:00:00ZA contention ratio is how many customers share a piece of network capacity. What 50:1 or 20:1 means, why providers do it, how sharing works on full fibre (GPON 1:32 splits), why it mostly shows up in the evening, and what uncontended means. Internet slow in the evening? Peak-time slowdowns explained and how to fix themhttps://tooltern.oddlathe.com/guides/internet-slow-in-the-evening-peak-time2026-11-11T00:00:00Z2026-11-11T00:00:00ZWhy broadband often slows down between about 7 and 11 pm, how to tell congestion at your provider from a problem in your own home, a simple test plan, and the fixes that actually help, including when to complain to your provider. Nvidia Reflex and AMD Anti-Lag: what they do and when to turn them onhttps://tooltern.oddlathe.com/guides/nvidia-reflex-amd-anti-lag-what-they-do2026-11-11T00:00:00Z2026-11-12T00:00:00ZWhat Nvidia Reflex, Nvidia's Low Latency Mode and AMD Anti-Lag actually change (the queue of frames waiting for the graphics card), when they cut input lag a lot and when they do almost nothing, what On + Boost means, and why they matter with frame generation. 60 vs 120 vs 144 Hz: can you actually tell the difference?https://tooltern.oddlathe.com/guides/60-vs-120-vs-144hz-can-you-tell-the-difference2026-11-11T00:00:00Z2026-11-12T00:00:00ZWhat refresh rate means, how many milliseconds each step from 60 to 120, 144 and 240 Hz really saves, who notices it, why your 144 Hz monitor might be stuck at 60, and what you need for 120 Hz on a PS5, Xbox or TV. VRR, G-Sync and FreeSync explained: what they do and should you turn them onhttps://tooltern.oddlathe.com/guides/vrr-g-sync-freesync-explained2026-11-11T00:00:00Z2026-11-12T00:00:00ZWhat variable refresh rate (VRR), G-Sync and FreeSync actually do, how they stop screen tearing without the stutter and lag of V-Sync, what the VRR range and LFC mean, how to set them up on a PC, PS5 or Xbox, and the frame-cap trick that keeps them working. Polling rate: 125 vs 1000 Hz (and 4000, 8000 Hz). Does it matter?https://tooltern.oddlathe.com/guides/polling-rate-125-vs-1000-hz-does-it-matter2026-11-11T00:00:00Z2026-11-12T00:00:00ZWhat polling rate means for a mouse, keyboard or controller, the real delay saved by going from 125 to 1000, 4000 or 8000 Hz, why the gains shrink fast, and when the higher rates cost you CPU time and stutter.