PDF schematic labelled CV538H-A, a 786 KB document opened in any standard PDF reader. The name gives only this code, with no brand or device. CV538H-A appears to be the designation of a universal LCD TV controller board, but match the silkscreen on your board before using it. Schematics like this let a technician trace supply regulators, panel interface lines and input signals, locate test points, and narrow down shorts or faults on the main processing board.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @pdf_servicemanual. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.