“Looking for service manual or schematic for APW70 power board and LAC391P LCD assembly – used in HP [insert full device name if known].”
If the schematic is unavailable:
If your portable device (e.g., a portable LCD monitor, small NAS, or rugged tablet) is dead, use this checklist with the schematic. apw70 lac391p schematic portable
If you are attempting a repair, always start with the power rails. If the rails are up, check the clock signals. If the schematic is blurry or difficult to read, focus on the passive components surrounding the main chips—90% of failures in portable electronics are caused by capacitors and resistors failing, not the main processor itself. “Looking for service manual or schematic for APW70