When troubleshooting, technicians typically check for these standard voltages: VCC: Main power supply (often 12V or 5V). VGH (Gate High): Typically 20V to 30V. VGL (Gate Low): Typically -5V to -10V. VCOM: Reference voltage for the pixels.
While a dedicated PDF for y320an01s4lv06 may not be publicly available, you are not without recourse. The absence of a schematic is a common challenge in electronics repair. Here is a practical, step-by-step approach based on standard troubleshooting techniques discussed in the repair community. y320an01s4lv06 circuit diagram pdf link
Verify the LVDS differential signals ( ) are reaching the panel using an oscilloscope. No Image/No Backlight: Check for 3.3V3.3 cap V VCCcap V sub cap C cap C end-sub ) and GND continuity at the connector pins. y320an01s4lv06 circuit diagram pdf link