Q1: Why do black patches or non-lighting modules appear on the LED wall during an event?

[cite_start]A: This is typically a physical hardware or connectivity issue rather than a signal source problem[cite: 1]. Potential causes include:

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• Ribbon Cable Loosening: Vibrations from high-powered event audio systems can cause the internal data cables (ribbon cables) between modules to shift or disconnect[cite: 1].
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• Power Supply Unit (PSU) Failure: If a perfectly rectangular area goes dark, it usually indicates a tripped or failed power supply that services that specific group of modules[cite: 1].
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• Receiving Card Malfunction: A failure in a single receiving card will interrupt the signal chain, causing the current cabinet and all subsequent units in the daisy chain to go black[cite: 1].
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• Signal Cable (RJ45) Damage: Worn-out network cables between LED cabinets can cause intermittent signal loss or complete blackouts in large sections[cite: 1].

Solution: Prestige Solutions recommends inspecting the rear of the screen to identify status lights. [cite_start]Re-seating data cables or replacing the local PSU usually resolves these issues immediately[cite: 1].

Q2: Why does the screen show "patchy" black blocks only with specific client laptops?

[cite_start]A: If the LED wall works perfectly with a test device but fails with a client's laptop, it is a Signal Protocol Incompatibility[cite: 1]. Key factors include:

• High Refresh Rates (>60Hz): Many modern laptops default to 120Hz. Most professional LED processors are capped at 60Hz. [cite_start]Exceeding this bandwidth causes the processor to drop data packets, appearing as black blocks[cite: 1].
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• HDR (High Dynamic Range) Metadata: If the laptop sends HDR10 or Deep Color (10-bit/12-bit) signals, the LED processor may fail to decode the extra metadata, resulting in rendering gaps[cite: 1].
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• Resolution Mismatch: Non-standard resolutions can confuse the mapping, causing certain pixels to be "ignored"[cite: 1].

[cite_start]Solution: Lock the output to 4K @ 60Hz and ensure HDR is toggled OFF in the display settings to ensure 100% stability[cite: 1].