Community-shared PDF files can often be found on platforms like or technician-led Telegram Archives For official user-facing hardware documentation, visit the Dell Support page for Inspiron 3558 Further Exploration
files to help technicians locate physical components on the PCB. Resource Links la-d402p schematic
Found a different revision of this board? Let us know in the comments below. If you need a specific voltage reading from the schematic, drop the component number (e.g., "What is PU103 pin 14?"), and I will reply with the answer. Community-shared PDF files can often be found on
The LA-D402P is a multi-layer board. You cannot visually trace circuits between layers. Without the schematic: If you need a specific voltage reading from
If you are reading this, you are likely staring at a Dell motherboard stamped with the code . Whether it came from an Inspiron 7559, a Precision, or a Vostro, this board is notorious for specific issues: no power, dead CPU rails, or shorted MOSFETs.