(most common): Support up to 16GB across 4 DIMM slots at speeds up to 1333MHz
Physical inspection is key. A user reported two burnt MOSFETs labelled as "01" on an board, designated as QP50 and QP61. Without a clear schematic, identifying the exact replacement part can be difficult. This scenario highlights the value of circuit knowledge: understanding that "01" likely signifies a particular MOSFET's characteristics is crucial.
Because E93839 is a regulatory mark, many different motherboard models for various computer brands carry this UL number. This explains the wide range of conflicting information online. Here is a master list of motherboards commonly associated with the E93839 marking:
Websites like Badcaps.net , Vinafix , or Eelbad have extensive repositories of user-uploaded schematics [2]. E93839 Motherboard Schematic
The schematic utilizes a primary PWM controller (such as an Intersil or ON Semiconductor chip) to manage gate drivers and MOSFETs.
Often based on the Intel H61 or H67 Express Chipset.
The clock generator ensures all components are synchronized. (most common): Support up to 16GB across 4
If you plan to use these boards outside their original Dell or HP cases, be aware of these challenges:
To find the correct schematic, you must identify the (e.g., CN-0XXXXX , Dell Model J3196 , etc.) printed directly on the PCB, usually near the PCI slots or between the CPU and RAM sockets. How to Find the E93839 Motherboard Schematic & Boardview
Locate the JFP1 or Front Panel Header diagram to check for power, reset, and LED connections. 4. Common E93839 Motherboard Faults and Solutions This scenario highlights the value of circuit knowledge:
Look for:
Trace the +12VSB line originating from Pin 1 of the power connector.
