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| Rail | Voltage | Primary use | | --------- | ------- | ------------------------------------------------ | | | 19 V | From the AC adapter (DC jack input) | | +3VALW | 3.3 V | Always‑on power for EC (Embedded Controller), RTC | | +5VALW | 5 V | Always‑on power for USB, audio codec | | +VCC_CORE | 0.7‑1.3 V | CPU core voltage (regulated by multi‑phase PWM) | | +VCC_GFX | 0.8‑1.2 V | Integrated graphics voltage (if no discrete GPU) | | +VDDQ | 1.5 V | DDR3 memory voltage | | +1.8V | 1.8 V | PCH (Platform Controller Hub) and other logic | | +1.05V | 1.05 V | PCH internal rails | | +VCC_AMD | 0.9‑1.2 V | Discrete AMD GPU core voltage | la-9413p rev 1.0 schematic
Pairs with the Intel Mobile QM87 or HM87 Platform Controller Hub (PCH). This public link is valid for 7 days
Based on real-world repair data from the Dell Latitude E6540 and Precision M2800 platforms, certain failure modes repeat regularly on this board architecture. First Stage Short Circuits (DC-In Failure) Can’t copy the link right now