Sharp PN-G655U CPWBY1084MPA7 circuit board

Sharp PN‑G655U is a 65″ industrial LCD flat‑panel display used in control rooms and public‑display applications. Common failures on this model include back‑light driver burnout, power‑rail sagging from the integrated DC/DC converters, and controller board IC faults that manifest as image distortion or complete blanking; signal‑interface mismatches (Hsync/Vsync/dot‑frequency) can also trigger display errors. First‑check diagnostics: verify 12 VDC input to the main board, inspect the back‑light driver output with a multimeter, and confirm video timing parameters from the host PC match the monitor’s specifications; if those are correct, examine the controller ICs for visible damage or overheating.[oss-gpt-20b]

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