While no official schematic exists, repair communities have experience with this model. Be cautious, as opening a PSU exposes you to dangerous high voltages, even when unplugged.
Blocks electromagnetic interference (EMI) from leaking back into the mains power line and protects the switching transistors downstream from sudden input voltage spikes. 2. Active Power Factor Correction (PFC) Circuit
uses a proprietary HP connector system rather than the standard 20/24-pin ATX format. It typically features the following connections: :
Many older D10-240P1A units fail due to bulged or leaking capacitors. D10-240p1a Schematic
If you cannot find the exact schematic:
Confirm compatibility between a specific PC model and this PSU series.
The HP D10-240P1A Go to product viewer dialog for this item. While no official schematic exists, repair communities have
If the PSU is not turning on, users often check the "Power On" (PS-ON) pin to see if it is being pulled to ground by the motherboard. Troubleshooting the D10-240P1A (No Power/No Boot)
It includes a 12Vsb (standby) rail rated at approximately 1.3A to keep the system ready for wake-on-LAN or power button signals. Common Review Points for Repair
Before diving into the circuit pathways, it helps to understand the baseline input and output thresholds of the unit. According to the HP D10-240P1A official ECOS certification , the hardware operates with high efficiency (exceeding 89% at typical loads) and uses a split +12V architecture: 100–240V ~, 4A, 50–60Hz Total Max Output: 240 Watts +12Vmain Rail: 16.0A max +12Vcpu Rail: 16.0A max +12Vsb (Standby): 1.30A max -12V Rail: 0.15A max Circuit Block Diagram: Stage-by-Stage Breakdown If you cannot find the exact schematic: Confirm
To bench-test the PSU without an HP motherboard, you cannot just short a green wire to a black wire blindly on a 24-pin block. For this model, you must locate the green on the proprietary 6-pin main connector and jump it directly to an adjacent black Ground pin . If the cooling fan fails to spin up or cycles erratically, an internal fault is present. Overheating Main Transistors and Missing Power Good Signal
The is a 240W proprietary switching power supply (SMPS) manufactured by HP (often under the Lite-On or Delta brands) for its small form factor (SFF) business desktops, such as the Elite 8000, 8100, 8200, and 8300 series .