Self‑Scan SII0640AZ00 Display PB board is the back‑plane controller that drives the 2558/6462 LCD panel in Self‑Scan industrial monitors. Common failure points on this class of display boards include burnt or cracked power traces, failed MOSFETs or driver ICs, and degraded capacitors on the power supply section; these often manifest as flickering, no image, or complete loss of video output. First‑check diagnostics should include verifying 12 V/5 V rail continuity with a multimeter, inspecting the board for obvious burn marks or loose solder joints, and confirming that the panel’s data lines are receiving correct signals from the controller. If power is present but no image appears, test the LCD driver ICs for proper voltage levels and review any error codes logged by the monitor’s diagnostic interface.[oss-gpt-20b]