Ipkbl-sr — 35w Schematic 'link'

I believe this is a power / regulator board used in certain laptops (possibly ThinkPad models with USB‑C / slim tip charging). The silkscreen reads something like:

Once the +19V rail stabilizes, it feeds a dual-channel Pulse Width Modulation (PWM) controller to generate the standby voltages:

The UEFI flash chip, which often requires reprogramming if the machine displays a "black screen of death." 5. Typical Failure Modes of the IPKBL-SR

Finding an exact schematic diagram for proprietary boards like the IPKBL-SR can be highly challenging, as manufacturers rarely release them to the public. However, by analyzing the component layout, chipset architecture, and standard Pegatron design patterns, we can map out the functional block diagram and power rails required for troubleshooting, board-level repair, and component diagnostics. 1. Specifications and Hardware Architecture ipkbl-sr 35w schematic

What the board is exhibiting (e.g., completely dead, spinning fan but no display, looping)? The exact power rail measurements you have taken so far? If you have access to a multimeter or oscilloscope ?

The external power brick supplies +19.5V through a barrel jack containing a center smart pin (HP ID pin).

Intel 6th Generation (Skylake) and 7th Generation (Kaby Lake) Core i3/i5/i7 processors, strictly limited to 35W TDP models (e.g., i5-7400T, i7-7700T). I believe this is a power / regulator

Intel 6th & 7th Gen (LGA1151) up to 35W TDP (e.g., i5-7400T, i7-7700T) 2x DDR4 SO-DIMM Slots (Non-ECC, Unbuffered) Power Input 19V DC Jack (External Adapter Power Delivery) Expansion M.2 Wi-Fi Slot, M.2 NVMe/SATA SSD Slot Power Distribution Rail Sequence

The IPKBL-SR follows a specialized All-in-One form factor rather than standard ATX. Key Power Rails

The IPKBL-SR 35W motherboard is a highly efficient platform designed to leverage Intel's low-power architecture. Diagnosing this board successfully relies heavily on executing a step-by-step validation of the power sequence, isolating the 19V primary rail from downstream step-down conversions, and verifying logic signals like RSMRST# and ALL_SYS_PWRGD . With a systematic schematic-driven approach, common faults can be isolated and repaired at the component level, extending the operational life of the underlying system. The exact power rail measurements you have taken so far

Equipped with multiple DisplayPorts and an HDMI connector to support external secondary monitors.

: N-channel or P-channel MOSFETs acting as electronic switches for structural power state transitions (S5 to S0 sleep/wake states). Conclusion & Safety Measures

Because this is an AIO motherboard, it lacks standard ATX connectors. Pin assignments must be verified manually: