La-9413p Rev 1.0 Schematic May 2026

The LA-9413P Rev 1.0 schematic is a must-have tool for anyone repairing Lenovo G40/G50/Z50 series laptops. It demystifies the motherboard’s power delivery, charging circuit, and signal paths. Combined with a multimeter and oscilloscope, it transforms guesswork into logical, step-by-step motherboard repair.

Always match the exact revision – Rev 1.0, 1.1, or 2.0 – because power ICs and resistor values can change between revisions.

You're looking for a schematic diagram of the LA-9413P Rev 1.0 motherboard!

The LA-9413P is a motherboard model from Wistron, a Taiwanese company that manufactures motherboards and other computer hardware. Unfortunately, I couldn't find a publicly available schematic diagram for this specific motherboard revision.

However, I can offer some suggestions to help you obtain the schematic:

Please be aware that schematic diagrams are often copyrighted and confidential, so be sure to respect any applicable laws and regulations when searching for or using the schematic.

I hope these suggestions help you in your search for the LA-9413P Rev 1.0 schematic diagram!

The Compal LA-9413P (VALA0) revision 1.0 schematic is a critical technical document for repairing the Dell Precision M2800 and Dell Latitude E5440 motherboards. It provides a detailed circuit map of components like the CPU power delivery, RAM slots, and interface controllers. Key Specifications & Resources

Device Compatibility: Primarily used in the Dell Precision M2800 (approx. 78 pages) and Dell Latitude E5440.

Technical Variance: Note that some available "LA-9413P" schematics are based on the similar LA-9411P. While nearly identical, the LA-9413P motherboard typically uses an eDP interface for the screen, whereas some reference schematics may show LVDS.

Official Maintenance: For physical disassembly or part replacement without needing the electrical circuit, refer to the Dell Latitude E5440 Owner's Manual. Common Troubleshooting Steps

When using this schematic for repairs, technicians often focus on these areas:

Power Rails: Check for the main B+ voltage and secondary rails (3.3V/5V ALW).

BIOS Chip: Locating the SPI Flash IC (often designated as U-something on the board) for reflashing if the laptop fails to POST.

Component Identification: The schematic helps identify specific Mosfets and ICs that may have shorted. Where to Find the Files

Laptop-Schematics: Offers the VALA0 LA-9413P Schematic for download/purchase.

ChinaFix: Provides the circuit diagram PDF for the Precision M2800 version.

NotebookSchematics: Lists related files including the LA-941 Boardview, which is essential for locating physical components on the PCB. la-9413p rev 1.0 schematic

Finding a reliable schematic for the LA-9413P Rev 1.0 motherboard is essential for repairing the Dell Latitude E5440. This specific board belongs to one of Dell's most popular business-class laptops, and having the circuit diagram is the difference between a successful repair and a "parts-only" listing. 🛠️ Board Overview: Dell Latitude E5440 (LA-9413P)

The LA-9413P Rev 1.0 is a Compal-designed motherboard. It typically houses 4th Generation Intel Core processors (Haswell architecture). Platform: Intel Shark Bay PCH: Lynx Point-LP Memory: DDR3L (Low Voltage)

GPU: Integrated Intel HD or Discrete NVIDIA (depending on sub-model) Super I/O (KBC): SMSC MEC1322 🔍 Key Sections of the LA-9413P Schematic

When troubleshooting this board, the schematic helps you navigate several critical "power rails" and logic circuits. 1. The Power Input Circuit (DC-IN)

Check the first and second MOSFETs (usually located near the DC jack connector). The schematic identifies the ACAVIN and VIN rails. If your laptop has no lights and won't charge, start here to ensure the 19V rail is crossing into the main system. 2. Standby Power (3.3V / 5V Rails)

The "Always-On" rails are managed by a PWM controller (often a TPS series chip). The schematic will label these as +3.3VALWP and +5VALWP. Without these, the power button will never trigger the boot sequence. 3. The Charging Circuit

The LA-9413P uses a dedicated charging IC to manage battery health and AC adapter detection. If you see "Plugged in, not charging," refer to the BATT_OUT and PS_ID sections of the diagram. 4. Sequence & Logic

The schematic includes a Power-Up Sequence chart. This is a "map" showing the order in which voltages must appear. If the laptop turns on for 3 seconds and dies, use this chart to find which "S-state" is failing. 💡 Pro Repair Tips for LA-9413P

Common Failure: Shorted ceramic capacitors on the +1.35V_MEM rail are frequent on this model, causing "no power" or "intermittent freezing."

BIOS Issues: This board uses two SPI Flash chips (UH2 and UH6). If power rails are present but there is no display, a BIOS re-flash is often required.

Component ID: Use the Boardview file in conjunction with the schematic. While the schematic tells you how it's connected, the boardview tells you where the component is physically located. 📥 Where to Find the Schematic

Since these are proprietary documents, they aren't usually hosted on official Dell sites. You can typically find them on: BadCaps.net (Free community forums) VinaFix or LaptopBlue (Technician databases) Sinaish (Schematic archives)

🚩 Safety Warning: Motherboard repair requires a multimeter, a DC power supply, and soldering skills. Never probe the board while the battery is connected. To help you further with your repair, could you tell me:

What is the current symptom (No power, no display, or liquid damage)? Do you have a multimeter and DC power supply ready? Are there any visible burn marks on the board? AI responses may include mistakes. Learn more

Compal LA-9413P Rev 1.0 (also known as VALA0) is the motherboard schematic for the Dell Latitude E5440

. For technicians, it is an essential document for diagnosing power-on failures and liquid damage on this specific model. Laptop schematic Core Technical Specifications

While finding the exact Rev 1.0 document can be tricky, technical archives note that it is nearly identical to other VALA0 series boards (like the LA-9411P) except for the screen interface. Laptop schematic Intel Haswell/Broadwell U-series (Integrated CPU/PCH). Key Interface Variation: specifically uses an eDP interface The LA-9413P Rev 1

for the display, whereas many similar schematics default to the older LVDS standard. Common Alternative:

is frequently used as a reference if the exact LA-9413P file is unavailable, as they share the same base design for the E5440 series. Critical Power Rails for Troubleshooting When diagnosing a "dead"

board, the following power sequence checkpoints are standard for this architecture

LA-9413P Rev 1.0 is a motherboard schematic manufactured by Compal Electronics

, primarily used in high-performance business laptops like the Dell Latitude E6540 Dell Precision M2800

. It is a critical document for technicians performing component-level repairs, such as fixing power delivery issues or BIOS corruption. Technical Specifications

(often part of the VALA0 board series) is designed to support 4th Generation Intel architecture Laptop schematic : Intel Haswell (Shark Bay ULT platform). : Integrated Intel HD graphics or Discrete AMD Mars M2 / Sun Pro with GDDR5 memory. : Dual-channel DDR3L supporting speeds up to 1600MHz. : Features an

(embedded DisplayPort) interface for the screen, which distinguishes it from similar boards like the LA-9411P that may use LVDS. Controllers : Uses the Embedded Controllers (EC). Common Repair Use Cases

Repair professionals use this 78-page schematic for various troubleshooting tasks: Power Rail Mapping

: Identifying the sequence of voltages (Power Sequence) required for the laptop to boot. BIOS & ME Region : Finding pinouts to flash the BIOS or clear the ME Region when the system experiences hanging or slow boot times. Component Identification

: Locating specific resistors, capacitors, or ICs (like the GPU or RAM slots) that may have faulty solder joints or corrosion. Laptop schematic Resources for Downloads

You can find the LA-9413P Rev 1.0 schematic and related BoardView files on several specialized technical platforms: : Provides the full Precision M2800 LA-9413P Schematic Laptop-Schematics : Offers the VALA0 LA-9413P Schematic along with Power Block and SMBus diagrams. Elektrotanya : A common source for free service manuals and circuit diagrams for similar Compal boards. Laptop schematic power rail on this board to troubleshoot a boot failure? Dell Precision M2800 LA-9413P Schematic - ChinaFix 14 Jan 2022 —

Compal LA-9413P (Rev 1.0) is a laptop motherboard schematic specifically used in the Dell Latitude E6540

. It represents a complex multi-layer PCB design centered on the Intel Haswell platform. Overview of Core Components

The LA-9413P revision 1.0 architecture integrates high-performance mobile components from the 2013–2014 era: Processor (CPU) : Supports Intel Haswell

processors (4th Gen Core i-series) utilizing the rPGA socket. Chipset (PCH) : Utilizes the Intel Lynx Point (8-series) chipset to manage I/O operations. Graphics (GPU) : Features a discrete AMD Mars M2 (or Sun Pro) GPU paired with dedicated memory. : Supports (Low Voltage) dual-channel RAM with speeds up to 1600MHz. Embedded Controller (EC) : Managed by the SMSC MEC5075

chips, which handle keyboard input, thermal monitoring, and power sequencing. Technical Architecture You're looking for a schematic diagram of the LA-9413P Rev 1

The schematic documentation typically includes several critical sub-diagrams for troubleshooting and repair: Power Block Diagram

: Illustrates the conversion of the primary 19V DC input into lower rails like +3.3V, +5V, +1.35V (RAM), and CPU core voltages. Power Sequence

: A step-by-step logic map showing the order in which power rails must stabilize—starting from the Real-Time Clock (RTC) and standby rails before reaching the "S0" (fully on) state. Display Interface : Note that while the LA-9413P board uses an eDP (embedded DisplayPort)

interface for the laptop screen, many leaked or "similar" schematics might show the older LVDS interface. SMBus/I2C Maps

: Detailed connections for communication between the battery, thermal sensors, and the chipset. Repair and Maintenance Resources

For technical work, engineers often look for these specific files related to the LA-9413P: Schematic (PDF)

: Detailed circuit diagrams including component values (resistors, capacitors) and pinouts.

: A specialized file (often .BRD or .CAD) that allows technicians to visually locate components on the physical PCB. BIOS/ME Region

: Firmware files required to fix "no power" or "slow boot" issues, often needing a "Clean ME" (Management Engine) version for this specific board. Compal Power Supply Schematic | PDF - Scribd

The LA-9413P Rev 1.0 motherboard is primarily found in the following Lenovo models:

These are entry-level to mid-range laptops featuring AMD processors (typically A4, A6, or E1 series) or select Intel Bay Trail-M (Celeron N2830/N2930) configurations.

Warning: Many "free schematic" websites are riddled with malware, fake downloads, or survey traps. Approach with caution.

Q: Is the LA-9413P Rev 1.0 the same as the LA-9414P?
A: No. LA-9414P is usually a different chipset (maybe AMD). Do not interchange schematics. Always match the exact part number.

Q: I have an HP G6 2200dx – will this schematic work?
A: Yes, most HP G6 and Compaq CQ58 with Intel HM70/HM76 use LA-9413P Rev:1.0. Remove the bottom cover and check the white barcode label near the RAM slot to confirm.

Q: Can I repair a liquid-damaged LA-9413P with only the schematic?
A: Yes, but you also need a multimeter. Look for corrosion on the power ICs listed in the schematic. Clean with isopropyl alcohol and check resistance to ground using the schematic's resistance tables.

| Component | Function | Page Reference (typical) | |-----------|----------|--------------------------| | PU401 (SY8288B) | 3V/5V standby regulator | Page 29 | | PU501 (NCP5911) | VCC_CORE controller | Page 32 | | PU701 (BQ24737) | Battery charger IC | Page 27 | | PU201 | 1.35V/1.5V memory supply | Page 28 | | EC IT8586E | Embedded controller | Page 20–22 | | PCH (SLJ8E/SLJ8C) | Platform Controller Hub | Page 9–13 |