La-d401p Schematic !!better!! Info

While finding the schematic can be a challenge, joining repair communities and investing time in learning to read boardviews will pay off. Keep your multimeter ready, respect the safety rules, and let the LA-D401P schematic guide you to a successful repair.

Surface-mount resistors, capacitors, and MOSFETs are unlabeled on the physical board. The schematic, paired with a boardview file (usually .BRD or .CAD), tells you that "PR101" is a 100kΩ resistor located near the charging IC. la-d401p schematic

| Symptom | Schematic Area | Component | Typical Failure | | :--- | :--- | :--- | :--- | | | Input protection | PQ101 | Gate resistor PR104 (10 ohm) open | | Powers on for 2 sec then off | +1.35V_SUS | PL402 (inductor) | Cracked solder joint → high resistance | | No display, external works | LVDS circuit (Page 10) | PU801 (PS8625 eDP-to-LVDS) | Failed programming or missing +3.3V_LVDS | | Battery not charging | Charger (Page 1) | PR113 (10 ohm) between BQ24737 and battery SMBus | Open circuit → no communication | | Short on +3.3V_ALW | Always-on (Page 2) | PC301 (ceramic cap near PCH) | Cracked cap (visual check: dark corner) | | CPU Vcore missing | VCC_CORE (Page 4) | PR508 (49.9K 1%) | Resistor drifted to >60K | While finding the schematic can be a challenge,