# GadgetGuiders > Consumer electronics and home-AV troubleshooting guides: TVs, streaming devices, gaming consoles, AV receivers, soundbars, HDMI, and home networking. Guides are researched against manufacturer documentation, with model-specific menu paths, error-code meanings, and step-by-step fixes. Content is written by the GadgetGuiders editorial team and verified against manufacturer sources; the site is supported by Amazon affiliate links, disclosed on every page. ## TVs - [Best LG TVs in 2026 - OLED, QNED, and Budget Picks](https://www.gadgetguiders.com/best-lg-tv): The best LG TVs in 2026 from budget to flagship. LG C5 vs C4 vs G5 OLED, plus QNED alternatives — which LG TV to buy for movies, gaming, and everyday use. - [Best TVs for Bright Rooms 2026: Anti-Glare Picks](https://www.gadgetguiders.com/best-tv-for-bright-rooms): The best TVs for bright living rooms in 2026. Which TVs have the highest brightness, best anti-glare coatings, and least reflection — Mini-LED vs QD-OLED - [Hisense TV Won't Turn On (Red Light Blinking): How to Fix It](https://www.gadgetguiders.com/hisense-tv-wont-turn-on-red-light-blinking): A Hisense TV that won't turn on with a blinking red light is often a stuck power state a full drain clears — but a repeating blink count is the board reporting a fault. The pattern tells you which. - [LG OLED HDMI Ports: 4K120, VRR and HDR Gaming Setup](https://www.gadgetguiders.com/lg-oled-hdmi-ports-settings-4k-hdr-gaming): On a C or G series every port does 4K120, so the real question is eARC placement and the one setting that silently caps you at 4K60. B and QNED are not the same. - [LG TV Red Blinking Light: What Each Pattern Means](https://www.gadgetguiders.com/lg-red-blinking-light-error-code): An LG TV blinking red and not turning on is signalling a fault. A hard power-drain clears many of them before the blink count means anything. - [Picture & HDR Too Dark or Washed Out: Quick Fixes](https://www.gadgetguiders.com/picture-hdr-too-dark-or-washed-out): Dark and washed-out are different faults with different fixes. The control most people reach for is the wrong one, and on TVs the slider labelled Brightness is black level. - [Roku TV Black Screen: How to Fix It](https://www.gadgetguiders.com/fix-roku-tv-black-screen): A Roku TV black screen is one of two very different things — the TV is alive but not lighting the panel, or it isn't powering up at all. A flashlight settles it. - [Samsung keeps restarting and won't turn on](https://www.gadgetguiders.com/samsung-keeps-restarting-and-wont-turn-on): A Samsung TV stuck in a restart loop or that will not boot is usually a stuck power state, and a proper power-drain clears many of them. - [Samsung TV eARC Not Working: Restore Soundbar Audio](https://www.gadgetguiders.com/samsung-tv-earc-arc-not-working): Fix Samsung TV eARC not working with soundbar or AV receiver. Anynet+ reset, Q-Symphony toggle, Digital Audio Output settings, and 2024–2026 menu paths. - [Samsung TV Error 107: No Internet Connection Fix](https://www.gadgetguiders.com/samsung-tv-error-107-internet-connection-fix): Samsung TV error 107 isn't a dead Wi-Fi connection — it's the Smart Hub failing a secure handshake with Samsung's servers. - [Samsung TV Error Code 3304 — Paramount+ Connection Fix](https://www.gadgetguiders.com/samsung-tv-error-code-3304): Error 3304 on a Samsung TV isn't a Samsung code at all — it's a Paramount+ app error. Check for an outage, kill any VPN, and reinstall the app, not the TV. - [Samsung TV Error Code List — What Each One Means](https://www.gadgetguiders.com/samsung-tv-error-code-list): A quick reference to common Samsung Tizen error codes and the one-line fix. Most are Smart Hub network errors solved by DNS and a reset. - [Sony TV Won't Turn On, Red Light Blinking: Fix](https://www.gadgetguiders.com/sony-tv-wont-turn-on-red-light-blinking): A blinking red standby light on a Sony Bravia is a self-diagnosis code. Count the blinks and tell a power-supply fault from a dead backlight. - [TCL Roku TV HDR Washed Out or Too Dark: Fix](https://www.gadgetguiders.com/tcl-roku-tv-hdr-looks-washed-out-or-too-dark-picture-settings-fixes): HDR that looks washed out or too dark on a TCL Roku TV is a picture-mode and HDR-brightness issue, not a defect. - [Vizio TV Not Turning On: How to Fix It](https://www.gadgetguiders.com/vizio-tv-not-turning-on): Vizio TV won't turn on or the power light blinks? Work through the most likely causes in order, from a stuck power cycle to a dead backlight. - [Why Is My Roku TV Screen Dark?](https://www.gadgetguiders.com/why-is-my-roku-tv-screen-dark): A dark Roku TV screen is usually a picture preset, an energy-saver setting or a failing backlight. Here is how to tell which one it is. - [Why Is My Samsung TV So Slow? How to Speed It Up](https://www.gadgetguiders.com/why-is-my-samsung-tv-so-slow): A laggy Samsung is usually a full cache, not a failing TV. Device Care clears it in about two minutes — and there's a reason the option is greyed out when you go looking for it. ## HDMI & cables - [4K 120Hz Not Working on Your TV: Fixes and Checks](https://www.gadgetguiders.com/4k-120hz-tv-not-working-fixes): 4K@120Hz or VRR dropping to 60Hz, flickering, or blacking out is almost always the wrong HDMI port, an under-spec cable, or the port's mode set too low. - [Best HDMI Cables for 4K, 8K, and eARC in 2026](https://www.gadgetguiders.com/best-hdmi-cable-for-4k-earc): The best HDMI cables for 4K/120Hz, 8K, eARC, and Dolby Vision in 2026. How to tell if your cable is the problem, what "certified" actually means, and which - [Best HDMI switch for 4K 120Hz gaming - what actually works](https://www.gadgetguiders.com/best-hdmi-switch-for-4k-120hz-gaming): How to choose an HDMI switch for 4K 120Hz gaming with PS5, Xbox Series X, or PC. What specs matter, what to avoid, and which switches actually work. - [Denon AVR ARC and eARC Not Working — Fix for All AVR Models](https://www.gadgetguiders.com/denon-avr-arc-earc-not-working): Denon AVR ARC or eARC not sending audio from your TV? Step-by-step fix for all Denon AVR models including AVR-S530BT, S540BT, S760H, X2300W, X2700H and more. - [HDMI ARC vs eARC: Differences Explained](https://www.gadgetguiders.com/hdmi-arc-vs-earc-differences): ARC vs eARC explained: bandwidth, uncompressed audio, Dolby Atmos and DTS:X support, HDMI cable requirements, and which one your setup needs. - [HDMI ARC/eARC Not Working: Fix Guide by TV Brand](https://www.gadgetguiders.com/hdmi-arc-earc-not-working): Fix HDMI ARC or eARC not working between your TV and soundbar or receiver, with verified menu paths for Samsung, LG, Sony, TCL, Vizio and Roku TV. - [HDMI No Signal or Black Screen: Fix by TV Brand](https://www.gadgetguiders.com/hdmi-no-signal-black-screen): Fix HDMI no signal and black screen on any TV: universal diagnostic sequence, the enhanced-HDMI-mode toggle per brand, and verified port maps. - [Onkyo TX-NR ARC Not Working — Fix for All TX-NR Models](https://www.gadgetguiders.com/onkyo-tx-nr-arc-not-working): Onkyo TX-NR ARC not sending audio from TV? Fix for all TX-NR models including TX-NR646, TX-NR656, TX-NR676, TX-NR686, TX-NR696, TX-NR6050, and TX-NR6100. - [Onkyo TX-SR HDMI No Signal: TX-SR606, 607, 608 Fix](https://www.gadgetguiders.com/onkyo-tx-sr-hdmi-no-signal): Onkyo TX-SR606, TX-SR607, or TX-SR608 showing no signal or black screen on HDMI? Fix HDMI passthrough, ARC, and no-signal issues with this step-by-step guide. - [PS5 HDMI Not Working: Black Screen and No Signal Fix](https://www.gadgetguiders.com/ps5-hdmi-not-working): PS5 black screen or no signal? Fix HDMI handshake failures and 4K HDR issues with the Safe Mode resolution reset and a short cable check. - [Sony STR Receiver ARC/eARC Fix: STR-DH and STR-DN](https://www.gadgetguiders.com/sony-str-receiver-arc-earc-not-working): Sony STR receiver ARC or eARC not working? Fixes for STR-DH590, DH790, DN1080 and all STR models, including Dolby Atmos passthrough. - [Sony TV no audio over eARC: error messages and fixes](https://www.gadgetguiders.com/sony-tv-no-audio-over-earc-error-fix): No sound over eARC from a Sony Bravia is usually the audio output set to TV speakers, eARC Mode on Manual, or the wrong port. Here's the order that fixes it. - [Xbox Series X HDMI Not Working: Black Screen Fix](https://www.gadgetguiders.com/xbox-series-x-hdmi-not-working-black-screen): An Xbox Series X black screen is usually a handshake or a display setting too high for the port — both recoverable. ## Streaming devices - [Apple TV 4K Alternatives: 3 Streamers Compared](https://www.gadgetguiders.com/apple-tv-4k-alternatives): Three Apple TV 4K alternatives compared for streaming quality, app support and price, so you can match a streamer to how you actually watch. - [Apple TV 4K: How to Fix Color Banding in HDR Mode](https://www.gadgetguiders.com/apple-tv-4k-how-to-fix-color-banding-in-hdr-mode): Most Apple TV banding is forced Dolby Vision tone-mapping or the stream itself. The box cannot output 4:4:4 at all, so chasing chroma settings is chasing the wrong thing. - [Apple TV 4K: Match Frame Rate & Dolby Vision Setup](https://www.gadgetguiders.com/apple-tv-4k-match-frame-rate-dolby-vision-settings): Two settings decide how everything looks, and the base format most people leave on is the wrong one. Includes why the black flash happens and the one feature that removes it. - [Apple TV Error Codes: 100, 3.0, 3902, 5001, 5051](https://www.gadgetguiders.com/apple-tv-error-codes): Apple TV showing an error code? 0, 3902, 5001, 5051 and more. Step-by-step solutions for activation, network, and streaming errors. - [Apple TV HDMI Handshake Fix: AV Receiver Black Screen](https://www.gadgetguiders.com/apple-tv-receiver-hdmi-handshake): Apple TV black screen through an AV receiver is almost always the receiver's 4K signal format set to Standard. The exact setting name and button combo for Denon, Yamaha and Onkyo. - [Apple TV Remote Not Working or Laggy: Siri Remote Fix](https://www.gadgetguiders.com/apple-tv-remote-not-working): Fix Apple TV Siri Remote not working, laggy, or unresponsive. Re-pair, charge, identify generation (1st/2nd/3rd), troubleshoot CEC and Bluetooth interference. - [Apple TV Wi-Fi buffering or slow streams: fixes that work](https://www.gadgetguiders.com/apple-tv-wifi-buffering): Apple TV buffering or stuck in 1080p is almost always the Wi-Fi getting to it, not the box. Here's how to steady the signal without losing HDR or Atmos. - [Fire TV Error Codes — Complete Fix Guide (All Error Codes)](https://www.gadgetguiders.com/fire-tv-error-codes): Complete Fire TV error code reference: fix codes 401, 403, 404, 451, 458, 702, 1061, 5001, 7136, 7279, ITV-101 and more with step-by-step solutions. - [Nvidia Shield 4K HDR Not Working: HDMI Handshake Fixes](https://www.gadgetguiders.com/nvidia-shield-4k-hdr-not-working-handshake-fixes): No 4K HDR from an Nvidia Shield is usually the resolution and colour-format settings, the TV enhanced mode being off, or an under-spec cable. - [Roku Error Code 009 — Wi-Fi Connection Fix](https://www.gadgetguiders.com/roku-error-code-009-fix): Roku error 009 means the device joined your network but can't reach the internet — a router DNS/gateway problem. - [Roku Error Code 014 and 014.30 — Complete WiFi Fix Guide](https://www.gadgetguiders.com/roku-error-014): Roku error 014 or 014.30 means your Roku cannot reach your WiFi. Fix the wrong password, router, and channel conflicts step by step. - [Roku Error Code 016 — Network Problem Fix](https://www.gadgetguiders.com/roku-error-016): Roku error 016 means the Roku reached your router but the router has no path to the internet. Fix it at the router, the DNS, or the ISP — in that order. - [Roku Not Turning On: What the Red Light Is Telling You](https://www.gadgetguiders.com/roku-not-turning-on): A stick needs 1A and a typical TV USB port supplies 0.5A. That gap explains the flashing red light, and the odd pattern where it boots fine then falls over mid-episode. ## Other guides - [AV Receiver ARC/eARC Not Working: Fix by Brand](https://www.gadgetguiders.com/receiver-arc-earc-not-working): Fix HDMI ARC or eARC on a Denon, Marantz, Onkyo, Pioneer, Yamaha or Sony receiver: verified menu paths and the input-assignment trap per brand. - [PS5 4K HDR but no 120Hz/VRR (TV + HDMI settings) — fixes](https://www.gadgetguiders.com/ps5-4k-hdr-but-no-120hz-vrr-tv-hdmi-settings-fixes): If 4K HDR works but 120Hz and VRR are greyed out, you are on an HDMI 2.0 port or cable. 4K120 needs an HDMI 2.1 port — more than 2.0 can carry. - [PS5 Error CE-10005-6 — How to Fix It](https://www.gadgetguiders.com/ps5-error-ce-10005-6): PS5 error CE-10005-6 (Sony writes it CE-100005-6) means the game or app couldn't load — usually a corrupted install, sometimes a disc read. - [PS5 Not Connecting to Internet via LAN (Ethernet): Fix](https://www.gadgetguiders.com/ps5-not-connecting-to-internet-lan): The connection test tells you which half is broken, so read it before changing anything. And a wired link that works but crawls at 100Mbps is a different fault with a different fix. - [PS5 Not Powering On: What the Beep Tells You](https://www.gadgetguiders.com/ps5-not-powering-on): Press power and listen. One beep with a black screen is a video or boot fault and the console is fine. No beep and no light is a power-delivery fault. The two problems share no fixes. - [PS5 Won't Output 4K HDR: What to Check and in What Order](https://www.gadgetguiders.com/ps5-wont-output-4k-hdr-fix): Nine times out of ten it's one setting on the TV, not the console. Here's the order to check, and the two things a PS5 genuinely cannot do no matter what you buy. - [TV Audio Delay: Fix Lip Sync for HDMI and Soundbars](https://www.gadgetguiders.com/audio-delay-on-tv-lip-sync-fixes): Which direction the sound is off decides which fix works. Audio delay sliders can only push sound later, never earlier, so early audio is a picture-processing problem. - [Why Does My TV Turn On by Itself? The Real Causes, in Order (2026)](https://www.gadgetguiders.com/why-does-my-tv-turn-on-by-itself): A TV that turns on by itself is almost always HDMI-CEC, a timer, a phone app, or a stuck remote button. Here is the test that finds the culprit in one night, plus the settings to change on Samsung, LG, Roku, Apple TV, Fire TV, and PS5. - [Xbox Error 0x800704cf: network connection problem (fixes)](https://www.gadgetguiders.com/xbox-error-0x800704cf-network-connection-fix): 0x800704cf means the Xbox can't reach the Xbox network to sign in — a connection/authentication problem, not a dead game. - [Xbox Series S HDMI Not Working / Black Screen: Fix Guide](https://www.gadgetguiders.com/xbox-series-s-hdmi-not-working-black-screen): A black screen or No Signal on an Xbox Series S is nearly always cable, input or display settings. Use the Pair button for the display reset. - [Xbox Series X|S: Fix No 4K, HDR, or 120Hz](https://www.gadgetguiders.com/xbox-series-x-s-no-4k-hdr-or-120hz): No 4K, HDR or 120Hz on an Xbox Series X|S is usually the wrong HDMI port, an under-spec cable, or a TV downgrade. Series S renders at 1440p. - [Yamaha Receiver: Audio Drops When Switching HDMI Inputs](https://www.gadgetguiders.com/yamaha-receiver-audio-drops-when-switching-hdmi-inputs): A short gap is the HDCP handshake and is normal. Long or failed drops usually trace to Standby Through, or to switching between a 2.1 and a 2.0 input on the same receiver. ## Soundbars & speakers - [Best soundbar for LG C3 and C4 with Dolby Atmos and eARC](https://www.gadgetguiders.com/lg-c3-c4-best-soundbar-for-dolby-atmos-earc): How to choose the best soundbar for LG C3 and C4 OLED TVs with Dolby Atmos and eARC: what to look for, setup tips, and top picks. - [Best Soundbars for Apple TV 4K: Stable Atmos Picks](https://www.gadgetguiders.com/best-soundbar-for-apple-tv): Best soundbars for Apple TV 4K with stable Dolby Atmos, low latency, and no eARC dropouts. How to connect, what to avoid, and which soundbars actually - [Has Sonos Fixed Their App? Where Things Stand](https://www.gadgetguiders.com/has-sonos-fixed-their-app): The 2024 Sonos app redesign broke a lot — here's where it stands now, which features came back, and what to do if your Sonos app is still buggy. - [Samsung Q-Series Soundbar eARC Fix: Q950A, Q990C/D](https://www.gadgetguiders.com/samsung-q-series-soundbar-earc-not-working): Samsung Q950A, Q990C or Q990D soundbar eARC not working? Fix eARC passthrough, Dolby Atmos and DTS:X with this step-by-step guide. - [Sonos Arc No Sound From TV: eARC and CEC Fixes](https://www.gadgetguiders.com/sonos-arc-no-sound-from-tv): Fix Sonos Arc no sound from TV. HDMI eARC handshake, CEC routing, audio format mismatches, Sonos app S2 setup, Trueplay tuning, and 2026 known issues. - [Sonos Arc Ultra Alternatives: 3 Atmos Soundbars](https://www.gadgetguiders.com/sonos-arc-ultra-alternatives): Three Dolby Atmos soundbar alternatives to the Sonos Arc Ultra: a polished single bar, a full in-box surround system, and a budget pick. - [Sonos Arc Ultra No Sound From TV: eARC Fixes That Actually Work](https://www.gadgetguiders.com/sonos-arc-ultra-no-sound-earc-fix): Arc Ultra silent, or Atmos suddenly gone and everything playing in flat stereo? It's almost always the eARC handshake. Here's the fix order that works, from power cycle to cable. - [Why Is My Sonos Speaker Flashing Red?](https://www.gadgetguiders.com/why-is-my-sonos-speaker-flashing-red): A flashing red Sonos usually means setup never finished or it needs a reboot, not a dead speaker. Red is not overheating and not mute. ## About - [About & methodology](https://www.gadgetguiders.com/about) - [Affiliate disclosures](https://www.gadgetguiders.com/disclosures)