The identifier is printed prominently on the PCB. It is crucial to note that "E93839" is actually an Underwriters Laboratories (UL) safety marking certifying the board's flammability rating and raw PCB manufacturer (often tracking back to Foxconn or Gold Circuit Electronics), rather than a singular Dell part number.
If the power supply fans spin for a fraction of a second and shut down immediately, a short circuit on a major power rail is triggering the Over-Current Protection (OCP). Disconnect all power. dell e93839 motherboard schematic updated
| Sub-Model / Code | Found In (Typical PC Model) | | :--- | :--- | | | Dell OptiPlex 780 | | LA0601 | Dell OptiPlex 9010 | | LA0531 | Dell OptiPlex 7010, Dell Precision T1650 | | HA0326, AM0426 | Various Dell OptiPlex All-in-One (AIO) systems | | AMO327 (0YC03K) | Dell OptiPlex XE2 | | KA0121 | Dell XPS 7900 | | E93839 (on PCB) | Dell OptiPlex 7080 (newer model) | The identifier is printed prominently on the PCB
Look directly at the surface of your motherboard for the following identifiers: Disconnect all power
The High-Side MOSFET shorts internally between Drain and Source. This links the