Professional Repair & Troubleshooting of an SMD LED Display Processor Board

Today I am sharing a real repair job from my electronics lab. This is the processor/controller board of an SMD LED display screen.
The board was being tested at component level. I checked the power supply sections, different voltages and important signal points on the PCB. I also used an oscilloscope to observe signals and trace the circuit during troubleshooting.
Repairing these processor boards requires careful measurements because they contain multiple power rails, processors, memory ICs and high-speed signal sections. A small fault in any section can cause the complete display system to stop working or produce an incorrect output.
These photos are from my actual repair work. I will continue sharing real electronics repair cases, PCB troubleshooting and component-level diagnosis from my lab.
Thanks for reading.