LEDFIXLAB JOURNAL
Work through dead pixels, damaged PCB pads, driver IC faults and power problems with practical repair guides for LED technicians.
A practical troubleshooting workflow for NovaStar receiving-card faults, including power checks, signal path tests, NovaLCT configuration, HUB outputs, ribbon cables, and replacement decisions.
Learn how to diagnose LED screen power supply faults, voltage drop, overloaded 5V rails, loose terminals, cabinet power branches, and flicker caused by unstable power.
A professional guide to common LED display driver IC failure symptoms, including vertical lines, missing colors, ghosting, flicker, thermal faults, shorted outputs, scan-related defects, and how to separate IC failure from LED bead, connector, power, or receiving-card problems.
A step-by-step diagnostic workflow for identifying a bad LED driver IC on an LED display module, including pattern testing, pin comparison, short-circuit checks, signal tracing, thermal inspection, and safe IC replacement confirmation.
A professional guide to repairing lifted, burned, missing, or cracked PCB pads on LED display modules, including fault diagnosis, pad reconstruction, jumper routing, solder control, testing, and when a module should be replaced instead of repaired.
A detailed repair guide for GOB LED display modules, covering resin evaluation, safe glue removal, dead pixel repair, LED replacement, clear resin refilling, curing, optical matching, and cases where GOB modules should not be repaired.
A practical guide to wire-bond and flip-chip LED packaging, covering reliability, brightness, thermal performance, pixel pitch, repair decisions, and where each technology fits in LED display applications.
A practical LED module repair workflow for diagnosing dead pixels, identifying whether the fault is caused by an LED lamp bead, solder joint, driver IC, row signal, power supply, or PCB trace, and completing a reliable repair.
A step-by-step guide to replacing damaged SMD LED lamp beads on P2.5 and P3.9 LED display modules, including component matching, polarity, hot-air settings, pad preparation, alignment, reflow, and final color testing.
