According to the schematic, U3's pin 2 (EN) must be above 1.5V. Measure it – you see 0V.
Open the PDF and search for "VCC_LV06". Trace it to the regulator (say U3, model MP1470). y320an01s4lv06 circuit diagram pdf new
Yes, if you have significant experience with switch-mode power supplies and LVDS signaling. However, component-level repair (replacing a specific MOSFET or op-amp) is nearly impossible without the new PDF. According to the schematic, U3's pin 2 (EN) must be above 1
Probably. Authentic new circuit diagrams are vector PDFs with selectable text. Blurry scanned copies from 2005 are useless for modern repairs. Keep searching. According to the schematic