HDCP Handshake Sequence:
1. Source device requests HDCP authentication
2. Display provides its HDCP key and capabilities
3. Distribution equipment passes keys between devices
4. Authentication tokens exchanged and verified
5. Encrypted content transmission begins
6. Periodic re-authentication occurs during playback

Device Compatibility Check:
Source Device → Check HDCP output version (1.4, 2.2, 2.3)
Distribution Equipment → Verify HDCP version support
Display → Confirm HDCP input capabilities

Common Version Conflicts:
- 4K@60Hz content requires HDCP 2.2 minimum
- Older displays (pre-2015) often limited to HDCP 1.4
- Mixed HDCP versions in signal chain cause failures

Isolation Testing Process:
1. Connect source directly to each display (bypasses distribution)
2. Test with different content types (protected vs unprotected)
3. Swap distribution equipment if direct connection works
4. Replace suspect cables one at a time
5. Document which combinations work/fail

Equipment Configuration:
Distribution System Settings:
→ Set HDCP output to "Auto" or lowest supported version
→ Enable "HDCP compatibility mode" if available
→ Disable HDCP entirely for non-protected content testing
→ Use "HDCP bypass" mode during troubleshooting

Source Device Settings:
→ Reduce output resolution temporarily (forces HDCP 1.4)
→ Disable HDR output if present
→ Change color space from RGB to YUV
→ Try different HDMI output if multiple available

Key Reset Procedure:
1. Power down entire signal chain (source to displays)
2. Wait 30 seconds for capacitor discharge
3. Power up displays first, wait for full initialization
4. Power up distribution equipment, allow HDCP key loading
5. Power up source device last
6. Test with non-protected content first, then protected content

Repeater Settings Checklist:
☑ Enable HDCP repeater mode (not bypass)
☑ Set maximum downstream device count
☑ Configure upstream/downstream HDCP versions appropriately
☑ Enable HDCP key refresh timers
☑ Set proper EDID management for HDCP capabilities
☑ Verify all outputs show HDCP ready status

Temporary Bypass Configuration:
⚠️ WARNING: Only for troubleshooting, not permanent installation

1. Locate HDCP disable jumpers on distribution equipment
2. Set source output to "PC/DVI" mode instead of HDMI
3. Use DVI-to-HDMI adapters to bypass HDCP entirely
4. Test signal path functionality without content protection
5. Re-enable HDCP after verifying hardware operation

EDID Data Structure:
Block 0: Basic display parameters (timing, color, manufacturer)
Block 1: Detailed timing descriptors and additional formats
Block 2+: Audio formats, HDR capabilities, extended resolutions

Critical EDID Fields:
→ Native resolution and preferred timing
→ Supported resolutions and refresh rates  
→ Audio capabilities and formats
→ HDCP version support
→ HDR and color space capabilities

Corruption Indicators:
- Source shows "unknown display" or generic monitor
- Resolution options limited to basic VGA modes
- Audio output shows "HDMI - No Audio Device"
- Display shows "unsupported format" message
- Intermittent resolution switching during operation

EDID Copy Procedure:
1. Connect laptop/EDID reader to primary display
2. Read and save EDID data from best/primary display
3. Program distribution equipment with saved EDID
4. Set all outputs to use same learned EDID
5. Verify source detects proper capabilities

Tools Required:
- EDID reader/writer (Extron EDID 101, Gefen EXT-EDID-LEARN)  
- Laptop with EDID management software
- Known-good reference display for EDID capture

Custom EDID Strategy:
Common Supported Formats:
→ 1920×1080@60Hz (universal compatibility)
→ 3840×2160@30Hz (4K compatibility for older displays)
→ Audio: PCM 2.0, PCM 5.1, Dolby Digital
→ Color: RGB 4:4:4, YUV 4:2:0
→ HDCP: 1.4 and 2.2 support

EDID Programming Process:
1. Analyze all display EDIDs in installation
2. Create intersection of common supported formats  
3. Add manufacturer-specific timing adjustments
4. Test custom EDID with all source devices
5. Document custom EDID for future service calls

Dynamic EDID Configuration:
Input 1 (Laptop): Standard computer timings + audio
Input 2 (Media Player): 4K HDR + surround sound formats  
Input 3 (Cable/Satellite): Broadcast timings + Dolby
Input 4 (Gaming): Low latency + variable refresh rate

Switching Logic:
- EDID changes automatically with input selection
- Brief black screen normal during EDID switch
- Source re-negotiates optimal format automatically  
- Display adapts to new timing requirements

Hardware Tools:
- Extron EDID 101H: Hardware EDID emulator
- Gefen EXT-EDID-LEARN: EDID capture and playback
- ATEN VE806: EDID recorder/player
- Custom EDID programmers from distribution manufacturer

Software Tools:
- Phoenix EDID Designer: Professional EDID editor
- Analog Way EDID Tool: Free EDID analyzer/editor
- DisplayCAL: Open-source display calibration with EDID tools
- CRU (Custom Resolution Utility): Windows EDID override

Quick EDID Verification:
Windows: Control Panel → Display → Advanced Settings
Mac: System Preferences → Displays → Hold Option + Scaled
Linux: xrandr command or edid-decode utility

Check for:
☑ Correct native resolution detected
☑ Proper refresh rate options available
☑ Audio device appears in sound settings
☑ HDR toggle available if supported
☑ Color depth options appropriate for display

Standard HDMI Cable Distances:
1080p@60Hz: 25-30 feet (standard copper cables)
4K@30Hz: 15-20 feet (high-speed copper cables)  
4K@60Hz: 10-15 feet (premium high-speed cables)
4K@60Hz HDR: 6-10 feet (ultra high-speed cables)

Factors Affecting Distance:
→ Cable quality and gauge (lower AWG = better)
→ Connector quality and termination
→ Environmental interference
→ Source output drive strength
→ Display input sensitivity
→ Signal complexity (resolution, color depth, refresh rate)

Active Cable Selection:
Fiber Optic HDMI (50-1000+ feet):
→ Immune to electrical interference
→ Lightweight and flexible
→ Requires power at one or both ends
→ More expensive but most reliable

Active Copper HDMI (30-100 feet):
→ Built-in signal amplification
→ Lower cost than fiber
→ Directional (source to display only)
→ Power from HDMI port or external adapter

Recommended Brands:
- Fiber: Luxul, Kramer, Extron AOC cables
- Active Copper: AudioQuest, Ruipro, Cable Matters

Extender Categories:

HDMI over Cat5e/6 (HDBaseT):
→ Up to 100 meters (328 feet)
→ Supports 4K, audio, control, Ethernet
→ Two-unit system (transmitter/receiver)
→ Power over Ethernet capability

HDMI Repeaters/Amplifiers:
→ Regenerate signal every 25-50 feet
→ Inline installation
→ Multiple cascade capability  
→ Some include EDID management

Fiber HDMI Extenders:
→ Unlimited distance potential
→ Electrical isolation
→ Single-mode or multimode fiber
→ Professional installation required

Cable Run Planning:
1. Measure total distance including vertical runs
2. Add 20% margin for routing around obstacles  
3. Plan for future cable replacement access
4. Consider environmental factors (heat, moisture, EMI)
5. Document cable paths and test points

Testing Procedure:
☑ Test cable before installation with intended signal format
☑ Verify performance at maximum rated resolution
☑ Test with different source devices  
☑ Confirm stable operation over 24-hour period
☑ Document actual performance vs. specifications

⚠️ TEMPORARY SOLUTIONS ONLY - Not for permanent installation

HDMI Coupler Method:
- Use high-quality gold-plated HDMI coupler
- Minimize number of connections (each adds loss)
- Test thoroughly before leaving site
- Plan permanent solution for next visit

HDMI over IP (Emergency):
- Use existing network infrastructure
- Consumer HDMI over IP adapters available
- Higher latency than direct connection
- Requires network configuration knowledge

Video Timing Standards:
CEA (Consumer Electronics): 720p, 1080i, 1080p, 4K broadcast
VESA (Computer): XGA, WXGA, WUXGA, computer resolutions
DMT (Display Monitor Timings): Standard computer display formats

Conflict Examples:
→ Computer outputs VESA 1920×1200, display expects CEA 1920×1080
→ Source outputs 4K@60Hz, display limited to 4K@30Hz
→ Gaming console outputs variable refresh, display fixed refresh
→ HDR source to SDR display timing mismatch

Source Device Analysis:
Windows: Display Settings → Advanced Display Settings
Mac: System Preferences → Displays (hold Option for more modes)
Gaming Console: Video Output Settings menu
Media Player: HDMI Output Configuration

Check Current Settings:
☑ Output resolution and refresh rate
☑ Color format (RGB vs YUV)  
☑ Color depth (8-bit vs 10-bit vs 12-bit)
☑ HDR mode (SDR, HDR10, Dolby Vision)
☑ Audio format and sample rate

Display Testing Process:
1. Check manufacturer specifications for native resolution
2. Test with known-good source at various resolutions
3. Document maximum supported refresh rates per resolution
4. Verify HDR and color space capabilities
5. Note any specific timing requirements or limitations

Common Display Limitations:
→ 4K displays with HDMI 1.4 limited to 30Hz
→ Older displays missing EDID refresh rate data
→ Gaming displays with G-Sync/FreeSync requirements
→ Professional displays with broadcast timing preferences

Custom Timing Configuration:

Windows (CRU - Custom Resolution Utility):
1. Download and run Custom Resolution Utility
2. Select display from dropdown
3. Add new resolution with specific timing parameters
4. Test custom resolution with "OK" button  
5. Make permanent if test successful

Manual Timing Calculation:
Horizontal: Active pixels + blanking periods
Vertical: Active lines + blanking periods  
Pixel Clock: (H-Total × V-Total × Refresh Rate) ÷ 1,000,000

Example 1920×1080@60Hz Calculation:
H-Total: 2200, V-Total: 1125, Refresh: 60Hz
Pixel Clock: (2200 × 1125 × 60) ÷ 1,000,000 = 148.5 MHz

Hardware Scaling Solutions:

Video Scalers in Signal Path:
→ Accept any input resolution/refresh rate
→ Output fixed resolution/refresh rate to displays  
→ Handle timing conversion automatically
→ Add processing delay (typically 1-3 frames)

Recommended Scalers:
- Extron DXP: Enterprise-level scaling and switching
- Kramer VS: Cost-effective scaling solutions
- Atlona: Integrated scaling in distribution matrices
- Crestron: DigitalMedia with scaling capability

Configuration Strategy:
Input: Auto (accept any format from sources)
Output: Fixed timing matched to display capabilities
Scaling: Maintain aspect ratio, sharp scaling algorithm
Frame Rate: Convert to display's preferred refresh rate

Optimal Source Settings:

Computer Sources:
→ Set resolution to display native (1920×1080, 3840×2160)
→ Use 60Hz refresh rate for compatibility
→ RGB color format for computer content
→ YUV 4:2:0 for 4K@60Hz over limited bandwidth

Media Players:
→ Match output to content frame rate when possible
→ Enable automatic resolution switching if available
→ Use YUV color format for video content
→ Configure audio to maximum display capability

Gaming Systems:
→ Disable variable refresh if causing issues
→ Set to highest stable resolution/refresh combination
→ Enable "gaming mode" on displays for low latency
→ Test with different color depth settings

Universal Compatibility Settings:
Resolution: 1920×1080 (guaranteed compatibility)
Refresh Rate: 60Hz (universal support)
Color Format: RGB 4:4:4 (sharp text and graphics)
Color Depth: 8-bit (maximum compatibility)
Audio: PCM 2.0 (universal audio support)

Emergency Override Process:
1. Boot source device to safe mode or BIOS
2. Connect directly to one display for configuration
3. Set conservative resolution/refresh settings
4. Save settings and test with distribution system
5. Gradually increase settings to find maximum stable configuration

HDMI Audio Formats:
PCM (Pulse Code Modulation):
→ Uncompressed audio (2.0, 5.1, 7.1 channels)
→ Sample rates: 48kHz, 96kHz, 192kHz
→ Bit depths: 16-bit, 20-bit, 24-bit
→ Compatible with all HDMI devices

Compressed Audio:
→ Dolby Digital (AC-3): 5.1 surround, 640 kbps
→ DTS: 5.1 surround, 1.5 Mbps
→ Dolby Digital Plus: 7.1 surround, higher bitrate
→ Dolby Atmos/DTS:X: Object-based surround

Audio Embedding Process:
1. Source embeds audio into HDMI video blanking periods
2. Distribution equipment extracts/processes audio data
3. Audio sent to separate amplifier/processor
4. Video continues to display with or without audio

Format Mismatch Symptoms:
→ Compressed audio sent to PCM-only processor
→ High sample rate audio to limited-capability equipment
→ Multichannel audio to stereo-only outputs
→ HDCP-protected audio extraction failures

Diagnostic Indicators:
- Audio processor shows "unsupported format"
- Intermittent audio dropouts during format changes
- Audio delay/sync issues with video
- Crackling or distorted audio output

Source Device Audio Settings:

Windows Audio Configuration:
1. Right-click sound icon → Playback devices
2. Select HDMI output → Properties → Advanced
3. Set sample rate (48kHz recommended for compatibility)
4. Configure speaker setup (stereo, 5.1, 7.1)
5. Test different formats if issues persist

Media Player Settings:
→ Audio Output: HDMI/Pass-through
→ Audio Format: PCM for compatibility, Bitstream for surround
→ Sample Rate: 48kHz (universal compatibility)
→ Channels: Match extraction equipment capabilities
→ Audio Delay: Adjust for lip-sync if needed

Gaming Console Configuration:
PlayStation: Settings → Sound → Audio Format
Xbox: Settings → Audio → HDMI Audio Format
Nintendo Switch: System → Audio (limited options)

Extraction Equipment Configuration:

Audio De-Embedders:
→ Set to appropriate input audio format detection
→ Configure output levels (line vs mic level)
→ Enable/disable HDCP for audio pass-through
→ Set audio delay compensation if needed

Matrix Switchers with Audio:
→ Configure audio follow video (AFV) operation
→ Set independent audio switching if needed  
→ Program audio level adjustments per input
→ Configure audio format conversion settings

Recommended Audio Extractors:
- Extron DXP Series: Professional matrix with audio
- Kramer VP-774: 4K scaler with audio extraction  
- Atlona AT-HD-M2C: Compact HDMI audio extractor
- Gefen EXT-HDMI-AUDIO: Dedicated audio de-embedder

Integration Best Practices:

Audio Processor Configuration:
1. Set inputs to appropriate format (PCM vs compressed)
2. Configure crossover and EQ for extracted audio  
3. Set proper gain structure (-10dBV to +4dBu conversion)
4. Enable lip-sync delay compensation
5. Test with various source audio formats

Cable and Connection Quality:
→ Use balanced audio cables for long runs
→ Avoid ground loops with audio isolation transformers
→ Shield audio cables from power and video cables
→ Use proper impedance matching (50Ω, 75Ω, 600Ω)
→ Terminate unused audio outputs to prevent noise

Audio Test Tools:
→ Audio generator with various formats and sample rates
→ Audio analyzer for level and distortion measurement  
→ HDMI analyzer with audio decoding capability
→ Oscilloscope for audio timing analysis
→ Digital multimeter for level verification

Software Tools:
- Audacity: Free audio recording and analysis
- REW (Room EQ Wizard): Audio measurement suite
- AudioTools: Mobile audio test apps
- HDMI test patterns with embedded audio tones

HPD Signal Process:
1. Display asserts +5V on pin 18 when powered/ready
2. Source detects voltage change and begins EDID read
3. Source and display negotiate optimal video format
4. HDCP handshake occurs if required
5. Video output begins

HPD Signal Requirements:
→ Voltage: +4.4V to +5.25V (nominal +5V)
→ Current: 50mA maximum source capability
→ Timing: Must be stable for >100ms for recognition
→ Pulse: Some sources require HPD pulse for re-detection

Voltage Problem Indicators:
→ Source doesn't detect display connection
→ Video output stops when display enters standby
→ Multiple displays cause HPD voltage drop
→ Intermittent display detection

Measurement Points:
- HDMI connector pin 18 to ground
- Distribution equipment HPD input/output
- Display HDMI connector HPD pin
- Long cable runs may show voltage drop

HPD Buffer/Amplifier Installation:

When to Use HPD Buffers:
→ Multiple displays on single output (voltage divider effect)
→ Long cable runs causing voltage drop
→ Displays with weak HPD output
→ Sources with sensitive HPD detection

HPD Buffer Configuration:
Input: Connect to source HPD output
Output: Buffered +5V to all displays
Power: External power supply for consistent voltage
Isolation: Prevents display issues from affecting source

Recommended HPD Solutions:
- Extron HPD 105: Five-output HPD buffer
- Gefen EXT-HDMI-HPD: HDMI hot plug detector
- Custom HPD buffer circuits for specific applications

Distribution Equipment HPD Settings:

HPD Pass-Through vs. Control:
Pass-Through Mode:
→ Display HPD directly controls source HPD
→ Display power state affects source output
→ Multiple displays may conflict

Control Mode:
→ Distribution equipment manages HPD to source
→ Consistent HPD signal regardless of display states
→ Manual control over source display detection

Configuration Options:
- Always present: HPD always active to source
- Follow power: HPD matches distribution equipment power
- Follow input: HPD active when input selected
- Manual control: User controls HPD state

Source Device HPD Configuration:

Windows Display Settings:
→ Multiple display settings
→ "Extend" vs "Duplicate" display modes
→ Custom resolution and refresh rate settings
→ Graphics driver HPD timeout settings

Professional Display Software:
- AMD Eyefinity: Multi-display management
- NVIDIA Surround: Gaming multi-display setup
- Intel Graphics: Basic multi-monitor support
- DisplayFusion: Third-party display management

Graphics Driver HPD Settings:
→ HPD timeout values (how long to wait for display)
→ EDID caching (remember display capabilities)
→ Hot plug behavior (re-detect vs maintain)
→ Display ordering and positioning

Quick HPD Verification:
1. Measure HPD voltage at source HDMI output (should be +5V)
2. Verify HPD voltage at display input
3. Check distribution equipment HPD LED indicators
4. Test with different display power states
5. Document voltage readings for comparison

Emergency HPD Override:
⚠️ TEMPORARY SOLUTION ONLY
→ Connect external +5V supply to source HPD input
→ Use HDMI-DVI adapter to bypass HPD entirely  
→ Force source to fixed output resolution
→ Plan proper HPD solution for next visit

HPD Pulse Generation:
- Some sources require HPD disconnect/reconnect
- Use HDMI switch to generate HPD pulse
- Power cycle display to trigger HPD assertion
- Distribution equipment with HPD pulse function

HDMI Ground Structure:
Signal Grounds: Pins 1, 3, 5, 7, 9 (individual pair shields)
Overall Shield: Connected to connector housing
Power Ground: Pin 17 (for +5V HPD power)

Ground Loop Formation:
Source Ground → HDMI Cable Shield → Display Ground
     ↓                                    ↓
Power Ground ←——— Building Ground ———————→ Power Ground
(Ground loop current flows through HDMI shield)

Visual Symptoms:
→ Horizontal lines or bars moving through image
→ Color shifting or tinting
→ Image brightness fluctuation
→ Sparkles or snow in image
→ Complete signal loss in severe cases

Audio Symptoms:
- 60Hz or 120Hz hum in extracted audio
- Clicking or buzzing sounds
- Audio level fluctuation
- Intermittent audio dropouts

Measurement Indicators:
→ AC voltage between equipment chassis (>0.1V indicates loop)
→ Ground resistance differences between equipment
→ RF noise on ground connections
→ Oscilloscope shows 60Hz interference on video signals

Grounding Best Practices:

Single Point Grounding:
→ All AV equipment connected to same electrical panel
→ Use same phase power distribution when possible
→ Minimize ground path resistance between equipment
→ Avoid mixing isolated and non-isolated power supplies

Equipment Rack Grounding:
1. Bond all equipment chassis to rack with short, low-impedance connections
2. Connect rack to building ground with heavy gauge wire (#6 AWG minimum)
3. Use star grounding configuration from central ground bar
4. Avoid daisy-chain grounding between equipment

Power Distribution:
→ Use isolated power distribution (technical power)
→ Ensure proper power system grounding at electrical panel
→ Check for neutral-ground faults in building wiring
→ Use power line filters to reduce conducted EMI

Isolation Techniques:

HDMI Ground Loop Isolators:
→ Galvanic isolation between source and display grounds
→ Optical isolation maintains signal quality
→ Adds cost and complexity but eliminates loops
→ May add slight signal delay

Fiber Optic HDMI Cables:
→ Complete electrical isolation between endpoints
→ Immune to ground loops and EMI
→ Higher cost but ultimate solution for problem installations
→ Requires power at one or both ends

Recommended Isolators:
- Extron DGI 44: 4×4 matrix with isolation
- Gefen EXT-DVI-EDIDHP: DVI/HDMI isolator  
- Kramer FC-332: Format converter with isolation
- Custom transformer isolation for specific applications

Electromagnetic Interference Reduction:

Cable Management:
→ Separate HDMI cables from power cables (minimum 12" spacing)
→ Cross power and signal cables at 90° angles only
→ Use ferrite cores on cables near EMI sources
→ Shield cable runs through metal conduit when possible

Equipment Placement:
- Keep sources away from power amplifiers and transformers
- Use equipment racks with solid construction and good grounding
- Maintain proper ventilation to avoid thermal issues
- Shield sensitive equipment from fluorescent lighting and motors

RF Shielding:
→ Use shielded equipment racks in high-EMI environments
→ Install EMI gaskets on rack doors and panels
→ Use filtered power distribution to reduce conducted EMI
→ Ground all metal conduit and cable shields properly

Essential Test Equipment:
→ Digital multimeter with low-resistance measurement capability
→ Ground resistance tester (Fluke 1625 or similar)  
→ Oscilloscope for ground noise analysis
→ AC voltage detector for ground loop identification
→ Non-contact voltage tester for safety

Measurement Procedures:
1. Measure AC voltage between equipment chassis
2. Check resistance between equipment grounds (<1Ω ideal)
3. Verify power system ground integrity at outlets
4. Test for neutral-ground faults in building wiring
5. Document all measurements for comparison over time

Temporary Ground Loop Solutions:
⚠️ Safety First - Never compromise electrical safety

Quick Fixes:
→ Move equipment to outlets on same electrical circuit
→ Use ground lift adapters TEMPORARILY for testing only
→ Install ferrite cores on HDMI cables near problem equipment
→ Use different HDMI cables with better shielding

Safety Notes:
- Never permanently remove equipment grounds
- Verify outlet wiring before using ground lift adapters
- Document temporary fixes for permanent resolution later
- Always restore proper grounding before leaving site

Critical Field Equipment:
Hardware:
→ HDMI cable tester with length certification
→ Multi-format signal generator with test patterns
→ Portable HDMI analyzer/scope
→ Assorted HDMI cables (6', 15', 25', active cables)
→ HDMI couplers, adapters, gender changers
→ USB-C to HDMI adapters for laptop backup
→ Wireless HDMI transmitter/receiver set
→ Portable HDMI extender over Cat6

Software Tools:
- Mobile apps for HDMI testing and signal generation
- Laptop with multiple video outputs and test patterns
- USB bootable diagnostic tools
- Network scanning and configuration utilities

When Distribution Fails:

Direct Connection Method:
1. Identify primary presentation source
2. Connect directly to main display
3. Use HDMI switch for multiple sources if needed
4. Document which inputs/outputs work for permanent fix

Wireless Display Alternatives:
→ Miracast/AirPlay for quick content sharing
→ Dedicated wireless presentation systems (ClickShare, Solstice)
→ HDMI wireless transmitters for temporary extension
→ Network-based display solutions over existing WiFi

When Long Cable Runs Fail:

Network Alternative:
→ Use existing Cat6 infrastructure with HDMI extenders
→ Powerline adapters for emergency extension
→ WiFi-based HDMI transmission systems
→ Network switches to create temporary HDMI over IP

Creative Routing:
- Different cable path through accessible areas
- Temporary surface-mount cable runs with cord covers
- Use of existing conduit or cable trays
- Coordination with other building systems (fire/security)

Immediate Actions:
1. Connect laptop directly to main display (bypass all distribution)
2. Load presentation content on laptop
3. Use laptop's presentation mode for dual display if needed
4. Set up wireless screen sharing for additional participants
5. Document failure modes for post-event troubleshooting

Equipment Priorities:
→ Laptop with HDMI output (universal compatibility)
→ USB-C dock with HDMI for newer laptops
→ Wireless presentation adapter
→ Long HDMI cable for emergency direct connection
→ HDMI switch for multiple source switching

Stabilization Techniques:

Signal Conditioning:
→ Insert HDMI repeater/regenerator in signal path
→ Lower resolution/refresh rate for stability
→ Use active cables instead of passive for long runs
→ Add HDMI buffer amplifier for multiple displays

Environmental Factors:
- Check for loose connections throughout signal chain
- Verify power supply stability to all equipment
- Look for EMI sources causing intermittent problems
- Test with different ambient temperature conditions

Sync Problem Quick Fixes:

Software Adjustments:
→ Media player audio delay settings
→ Display "Game Mode" or "PC Mode" for lower latency
→ Graphics driver timing adjustments
→ Presentation software audio/video sync controls

Hardware Solutions:
- Audio delay processors in extracted audio path
- Different HDMI port on source device
- Bypass audio processing in distribution equipment
- Use analog audio backup from source device

Critical Information to Record:

System Configuration:
→ Equipment models and firmware versions
→ Cable types, lengths, and routing
→ Signal formats being used (resolution, refresh, audio)
→ Environmental conditions and power quality

Problem Description:
- Exact symptoms observed
- Conditions when problems occur
- Temporary solutions implemented
- Equipment that tested good vs. problematic

Follow-Up Requirements:
☑ Parts needed for permanent repair
☑ Required firmware updates or configuration changes
☑ Environmental issues to address
☑ Training needed for end users
☑ Preventive maintenance recommendations

Transition Planning:

Immediate Needs:
→ System operational status and limitations
→ Any ongoing monitoring requirements
→ User instructions for temporary configuration
→ Emergency contact procedures if issues recur

Long-Term Planning:
- Equipment replacement or upgrade requirements
- Installation scheduling for minimal disruption
- Budget requirements for permanent solutions
- Training schedule for facility staff
- System documentation updates needed