🔬 Interactive Browser Hardware & Peripheral Test Bench
Powered by live HTML5 Gamepad, WebAudio, High-FPS Canvas & Sub-Millisecond Pointer APIs — zero installs required.
Gamepad & Controller Stick Drift & Circularity Tester (Live 60 FPS)
Connect any USB or Bluetooth gamepad to test real-time analog stick centering error, circularity clipping percentages, trigger travel thresholds, and dual-motor rumble force.
PS5 DualSense Stick Drift Tester & Calibration Diagnostic
Precision browser diagnostic tool calibrated for Sony DualSense (CFI-ZCT1W). Measure left/right analog stick drift, adaptive trigger travel, and headphone jack audio loopback.
Mouse Double Click & Switch Chatter Tester (High-Precision <80ms Detector)
Click inside the test canvas to capture microsecond-precision mechanical switch bounce. Identifies failing Omron, Huano, and Kailh GM switches before you open your mouse.
Display Dead Pixel, Stuck Pixel & OLED Burn-In Uniformity Tester
Cycle through pure Red, Green, Blue, White, Black, and 5% Gray slides in fullscreen to spot dead pixels, stuck RGB subpixels, dirty screen effect (DSE), and OLED burn-in.
Xbox Series X/S Controller Stick Drift & Button Tester
Connect your Xbox Wireless Controller via USB or Bluetooth to benchmark analog stick centering, view trigger impulse haptics, and verify D-pad switch responsiveness.
Monitor Refresh Rate & UFO Motion Clarity Tester (60Hz / 144Hz / 240Hz / 360Hz / 540Hz)
Synchronized requestAnimationFrame refresh rate counter. Compare motion blur across 60Hz, 120Hz, 144Hz, 240Hz, and 360Hz with ghosting and inverse ghosting detection.
Mechanical Keyboard Switch Chatter & NKRO Anti-Ghosting Tester
Type on any mechanical, membrane, or optical keyboard to illuminate the interactive key matrix, detect switch chatter under 45ms, and test rollover limits.
Audio Stereo Balance, Polarity & Frequency Sweep Tester (20Hz - 20,000Hz)
Generate pure sine wave sweeps from 20Hz to 20kHz, test headphone left/right stereo separation, check acoustic phase cancellation, and inspect microphone frequency response.
MacBook Pro Liquid Retina XDR Dead Pixel & Backlight Bleed Tester
Fullscreen diagnostic tool calibrated for Apple Silicon Liquid Retina XDR panels. Evaluates 2,554 local dimming zones and 1,600 nit peak brightness.
Alienware QD-OLED Pixel Refresh & Image Retention Tester
Inspect Dell Alienware AW3423DW and AW3225QF QD-OLED monitors for subpixel burn-in, image retention, and HDR 1000 clipping.
AirPods Pro Audio, Bass & Stereo Balance Diagnostic Tester
Precision audio diagnostic suite for AirPods. Test left vs right channel decibel balance, low-end bass extension, and spatial audio alignment.
Touch Screen Digitizer Dead Zone & Multi-Touch Drawing Tester
Touch-sensitive canvas that tracks simultaneous touch points. Identifies cracked glass digitizer disconnects where drawing fails to register.
🗂️ Browse By Diagnostic Category Hub
Interactive Hardware, Display & Audio Diagnostic Lab
Real-time browser-based diagnostic utilities powered by Gamepad API, WebAudio, High-Precision Timers, and Fullscreen Screen APIs. Test controller stick drift, polling rate, mouse switch double-clicks, display dead pixels, OLED burn-in, refresh rate UFO motion, mechanical keyboard chatter, and microphone noise floors directly in your browser without downloading any software.
Home Appliance Error Code & Diagnostic Troubleshooter
Master interactive troubleshooter for washing machines, dishwashers, dryers, and refrigerators from Samsung, LG, Whirlpool, Bosch, GE, and KitchenAid. Features OEM diagnostic service mode sequences, multimeter resistance test specs, drain pump clearing guides, and interactive symptom narrowers.
HVAC, Thermostat & Tankless Water Heater Diagnostic Center
Comprehensive diagnostic guides and LED blink-code decoders for Google Nest, Ecobee, Carrier, Trane, Goodman, Navien, and Rinnai systems. Includes 24VAC transformer wiring checks, C-wire power diagnostics, flame sensor cleaning, pressure switch testing, and heat exchanger error resolution.
Gaming Console & Smart TV Diagnostics & Blink Decoders
Detailed hardware diagnostic decoders for PlayStation 5, Xbox Series X/S, Nintendo Switch, and Sony Bravia / LG OLED / Samsung TV standby red light blink codes. Decodes power supply failures, HDMI IC retimer chip faults, T-Con board shorts, and Safe Mode factory rebuilds.
Automotive OBD2 Diagnostic Trouble Code (DTC) Center
Professional automotive diagnostic engine for Generic and Manufacturer-Specific OBD2 trouble codes (P0420, P0171, P0300, P0455, P0128, etc.). Features exact sensor voltage/resistance benchmarks, freeze frame triage, fuel trim analysis, smoke test procedures, and DIY vs mechanic cost comparisons.
🛠️ High-Frequency Error Code & Blink-Pattern Troubleshooters
Every guide includes an interactive Yes/No symptom narrower, hidden service mode timer, schematic diagram & exact OEM part numbers.
P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) Diagnostic
OBD2 code P0420 indicates that the Bank 1 catalytic converter's oxygen storage capacity has dropped below the minimum emissions threshold. The downstream O2 sensor is mirroring upstream sensor switching.
Samsung Washer 4C (4E) Error Code Troubleshooter & Fix
Samsung washer error code 4C (older models 4E) indicates a Water Supply / Filling Timeout fault. The machine failed to detect adequate water level rise within 10 to 45 minutes of filling.
P0171 Code: System Too Lean (Bank 1) Causes, Smoke Test & Fix
OBD2 code P0171 indicates that the engine computer has reached its maximum fuel enrichment limit (+20% to +25% fuel trim) trying to compensate for an air-fuel mixture that contains excess unmetered air.
Samsung Washer 5C (nd / 5E) Drain Error Code Troubleshooter
Samsung washer error 5C (older models 5E or nd) indicates a Drainage Failure. The machine attempted to pump out wash water but the tub level failed to decrease within 15 minutes.
P0300 Code: Random / Multiple Cylinder Misfire Diagnostic Guide
OBD2 code P0300 indicates that the engine control module has detected random, intermittent misfires occurring across multiple cylinders simultaneously rather than isolated to a single cylinder.
Google Nest Thermostat e74 (No Power to Rh Wire) Troubleshooter
Nest error code e74 indicates that the thermostat has lost 24VAC control power on the Rh (Red - Heat) wire. The heating system cannot activate until 24VAC circuit continuity is restored.
LG Washer OE Error Code Diagnostic & Drain Pump Repair
The LG washer OE error code indicates an Obstruction / Evacuation fault. The electronic control did not detect water level drop to the reset level within 10 minutes of drain activation.
PS5 Error Code CE-108255-1 (Game Crash) Troubleshooter & Fix
PS5 error code CE-108255-1 is a general application crash error. The console operating system halted the active game executable due to memory corruption, cache desync, or GPU instruction fault.
Bosch Dishwasher E15 Error Code (Water in Base Pan) Troubleshooter
The Bosch E15 error code indicates that the AquaStop anti-flood safety system has engaged. Water has leaked into the internal bottom base pan, raising the styrofoam safety float.
Whirlpool Washer F21 (F02) Drain Error Code Diagnostic
Whirlpool error code F21 indicates Long Drain. If drain time exceeds 8 minutes, the water valves are turned off and the drain pump is energized for 4 additional minutes before throwing F21.
Sony Bravia TV 4 Red Blinks Troubleshooter (Backlight / LED Driver Fault)
When a Sony Bravia TV shuts down and flashes its standby LED 4 times in a continuous loop, it indicates a Backlight / LED Driver (LD Board) Protection Fault.
Carrier Furnace Code 33 & 13 (Limit Circuit Lockout) Troubleshooter
Carrier furnace Code 33 indicates a Limit Circuit Fault (high limit switch, rollout switch, or draft safeguard switch is open). Code 13 occurs after 3 consecutive open cycles, locking out the system.
P0700 Code: Transmission Control System Malfunction Diagnostic Guide
OBD2 code P0700 is an informational DTC indicating that the Transmission Control Module has illuminated the Check Engine Light and stored internal transmission codes.
P0335 Code: Crankshaft Position Sensor (CKP) Circuit Malfunction Fix
OBD2 code P0335 indicates that the engine control module has lost the reference timing signal from the Crankshaft Position Sensor, preventing spark and injection.
P0101 Code: Mass Air Flow (MAF) Sensor Circuit Range/Performance Fix
OBD2 code P0101 indicates that the Mass Air Flow sensor signal is irrational compared to calculated airflow from engine RPM, throttle position, and manifold pressure.
P0442 Code: EVAP System Small Leak Detected Diagnostic & Smoke Test
OBD2 code P0442 indicates that the EVAP monitor detected a small fuel vapor leak (equivalent to a 0.040-inch pinhole) during pressure decay testing.
P0304 Code: Cylinder 4 Misfire Detected Causes, Swap Test & Fix
OBD2 code P0304 indicates that the engine computer has detected incomplete combustion specifically isolated to Cylinder 4.
P0303 Code: Cylinder 3 Misfire Detected Diagnostic & Repair Guide
OBD2 code P0303 indicates that the engine control module has recorded consistent combustion failures specifically on Cylinder 3.
P0302 Code: Cylinder 2 Misfire Detected Causes & Coil Swap Test
OBD2 code P0302 indicates that the engine control module detected rotational crankshaft deceleration specifically during Cylinder 2 combustion power strokes.
P0430 Code: Catalyst System Efficiency Below Threshold (Bank 2) Fix
OBD2 code P0430 indicates that the Bank 2 catalytic converter has degraded below minimum emissions storage thresholds, mirroring Bank 1 code P0420.
Samsung TV 5 Red Blinks Error Troubleshooter (T-Con Board / Panel)
Samsung TV 5 Red Blinks indicates a T-Con Board or Display Panel Gate Driver Short Circuit. The 12V T-Con supply rail drops due to a shorted ceramic capacitor.
Xbox Series X Black Screen of Death Video Output Reset Guide
When an Xbox Series X powers on with a solid white logo but outputs no HDMI video, the console is locked in an unsupported resolution or the HDMI IC has failed.
PS5 Stuck in Safe Mode Boot Loop Hardware Recovery Guide
When a PS5 powers on directly into Safe Mode repeatedly, the APU cannot verify the cryptographic signature of the operating system partition on SSD.
Navien Tankless Water Heater E016 Error Code (Heat Exchanger Overheat) Fix
Navien error E016 indicates Heat Exchanger Overheating. The high-limit thermistor detected heat exchanger water temperatures exceeding 194°F (90°C).