HP L70042-004 180W Replacement Computer Power Supply — For HP Pavilion and ProDesk Desktops

A matched 180W supply to get HP Pavilion and ProDesk desktops running again.

The HP L70042-004 is a 180W internal power supply for HP desktops including the Pavilion 590-p0xxx series and compatible ProDesk models that list this part. It uses HP connectors and mounting and accepts 100–240V AC input. It suits home users, offices and repair shops.

Why the Exact HP Spare Part Matters

HP desktops in this generation use proprietary power connectors and compact mounting. A generic supply may not plug into the motherboard or fit the case, which turns a quick repair into a long one.

The L70042-004 is the HP spare part made for these systems. Ordering by the exact part number on the failed unit avoids fit and connector problems.

Efficient 180W Design

A 180W output matches the low power requirements of these desktops, with integrated fan cooling and standard protections against over-voltage, over-current and short circuits.

One Spare for Several Models

The part is used across HP Pavilion and ProDesk desktops of the same generation, which simplifies spare parts for repair shops and IT departments.

Setup Instructions

How to Replace the HP L70042-004

1. Shut down the HP desktop, unplug the AC cord and press the power button for a few seconds to drain residual power.
2. Open the side panel, photograph the cable routing, then disconnect the power cables from the motherboard, drives and any graphics card.
3. Remove the mounting screws or release latch, take out the old unit and install the replacement in the same position.
4. Reconnect every cable, close the case, plug in the AC cord and power on to confirm the system boots and the fan spins.