Ps42419ha Schematic Work [patched] Jun 2026

The easiest approach is to purchase a matching unit. Be aware that HP also released a PS-4241-9HB variant, which is generally identical in electrical specifications and pinout. These units are readily available from online retailers like eBay and Newegg , or specialized parts suppliers [9†L4-L8][11†L40-L42].

Failure in the switching MOSFETs or the PWM controller IC.

: Uses a dedicated standby PWM IC (often a 7-pin or 8-pin variant) and an MBR3100H or similar diode for the standby voltage output. Common Faults & Repair Steps ps42419ha schematic work

: The PS-4241-9HA's +5V_SB (Pin 1) should always be present when AC power is connected. If this voltage is missing, the standby circuit is faulty, and the PSU will not turn on.

) is a notorious protagonist. This 240W, 80 PLUS-rated unit was once the heart of many high-performance desktops and plasma-era systems, known for its efficiency but also its complex failures. The easiest approach is to purchase a matching unit

The search for an official schematic for the PS-4241-9HA is a common quest for technicians. However, major manufacturers like HP typically keep these documents confidential, releasing them only to authorized service partners. Publicly available schematics for proprietary power supplies are exceptionally rare.

If any test fails, revisit the compensation network or PCB layout (feedback loop area, ground vias). Failure in the switching MOSFETs or the PWM controller IC

If you are currently performing schematic work on this unit, these verified specs may help: Efficiency : Typical 90.51% (50% load); 80 PLUS Bronze equivalent. : 100-240V, 50-60Hz. Common Failure Points Standby IC : Often causes "no power" or "missing standby voltage." Output Diodes