Hardware Resolution Library
Step-by-step guides to get your devices running.
Guided Device Troubleshooter
Narrow down your hardware fault by answering quick questions
What type of device are you having trouble with?
PC & Laptop
BIOS beep codes, caps-lock flash status, hard drains, physical RAM reseating.
Open guides →Printers
Laser & inkjet hard resets, feed roller clears, blinking diagnostic sequences.
Open guides →Mobile Phone Fix
Hardware button reboots, charging port cleaning, loop recovery states.
Open guides →WiFi Routers
ISP modems & routers — LED color patterns, power cycling, factory resets.
Open guides →Smart Home
Thermostats, security cams, smart hubs — wiring checks and physical resets.
Open guides →Appliance Errors
Washing machines, dishwashers and ovens — physical error codes & sensor resets.
Open guides →Smart TVs
Power board failures, screen flashing codes, button combo resets, cable diagnosis.
Open guides →Device Pairing
Bluetooth handshake clears, audio peripheral pairing, button-based pairing.
Open guides →Printer Diagnostic Spotlights
All Printer Guides →HL-L2320D
Solid Orange Error LED
A solid orange error light on the Brother HL-L2320D indicates that the top panel cover is not f...
Diagnose Device →HL-L2350DW
Drum Light Flashing
The flashing Drum light indicates that the corona wire is dirty or that the internal drum count...
Diagnose Device →MFC-L2710DW
Replace Toner Error
The 'Replace Toner' message on the Brother MFC-L2710DW occurs when the internal optical sensor ...
Diagnose Device →Appliance Sensor & Reset Codes
All Appliance Guides →Router LED Light Status Diagnosis
All Router Guides →Router LED Color Meanings
- 🔴 Solid Red / Amber: Internal firmware lockup or power supply issue. Power cycle immediately.
- 🟠 Blinking Orange / Amber: WAN connection failed. Check physical coaxial or fiber cabling lines.
- 🟢 Flashing Green / White: Device is booting or resetting. Do not unplug during this sequence.
TV Symptom Patterns & Power Resets
All TV Guides →U6G
Stuck on Standby LED
A Hisense U6G TV stuck with a solid red standby LED that doesn't react to remote or physical buttons is experiencing a mainboard controller crash. The power board is supplying standby power, but the mainboard processor cannot execute the startup instructions.
Motherboard POST & Caps Lock Diagnostic Indicators
All PC Guides →🔊 Audible POST Beep Diagnostics
8 Beeps at Startup
Read Audio Sequence →3 Long 4 Short Beeps
Read Audio Sequence →3 Short Beeps at Startup
Read Audio Sequence →💡 LED Blink Code Diagnostics
Power Light On but Black Screen
Read Flash Pattern →Unresponsive / Blank Screen
Read Flash Pattern →Black Screen Won't Turn On
Read Flash Pattern →Mobile Port & Power Lockup Resets
All Mobile Guides →iPhone 12
Lightning Port Loose or Not Charging
iPhone 13
Camera Shaking or Buzzing (OIS Shaking)
Smart Home Thermostats & Wiring Clearances
All Smart Home Guides →Smart Lock
Flashing Red Circle
A flashing red circle light around the manual turn-dial of the August Smart Lock indicates that the ...
Check Wiring & Resets →Smart Thermostat
Flashing Green Light on Top
A pulsing or flashing green LED bar on the top edge of the Ecobee Smart Thermostat indicates an unre...
Check Wiring & Resets →SmartThermostat with Voice Control
Blank Black Screen
A blank or black screen indicates the thermostat is not receiving 24V AC power from the HVAC control...
Check Wiring & Resets →Halo
Flashing Red Light / Beeping
A flashing red interior status light accompanied by beeping on a Kwikset Halo smart lock indicates a...
Check Wiring & Resets →Smart Garage Hub
Flashing Green LED / Beeping
A flashing green LED on the MyQ Smart Garage Hub accompanied by warning beeps indicates that the hub...
Check Wiring & Resets →Thermostat
W5 Error Code
The W5 error code indicates that the Nest Thermostat's physical Wi-Fi chip is unable to connect to t...
Check Wiring & Resets →Learning Thermostat
Blinking Red Light
A blinking red light on the top of the Nest Learning Thermostat screen indicates that the internal b...
Check Wiring & Resets →Learning Thermostat 3rd Generation
E74 No Power Error
The E74 error indicates that the thermostat is not detecting 24V AC power on the Rh or Rc wire. This...
Check Wiring & Resets →Protect Smoke and Carbon Monoxide Alarm
Chirping and Pulsing Yellow Light
A chirping sound paired with a pulsing yellow light signifies that the Nest Protect has detected low...
Check Wiring & Resets →Hue Bridge 2.0
Internet Light Flashing and Not Connecting
An internet light flashing or remaining off indicates that the Hue Bridge has established local netw...
Check Wiring & Resets →Video Doorbell 3
Spinning White Light and Not Charging
A spinning white light or failure to charge despite being hardwired indicates the doorbell is not re...
Check Wiring & Resets →Video Doorbell
Solid Blue Light
A solid blue ring light on a Ring Video Doorbell indicates that the internal button contact is physi...
Check Wiring & Resets →Encode
Beeping & Red X
A red 'X' flashing on the keypad accompanied by three long beeps on the Schlage Encode smart lock in...
Check Wiring & Resets →Base Station
Pulsing Red Light
A pulsing red ring light on the SimpliSafe Base Station indicates a critical system warning, commonl...
Check Wiring & Resets →