Dell Optiplex 740 Motherboard Diagram Access

A standard CR2032 lithium battery to maintain BIOS settings. Password Jumper (PSWD): Used to clear forgotten BIOS passwords. Common Upgrades and Repairs

Understanding Your Dell OptiPlex 740 Motherboard: A Complete Diagram Guide Dell Optiplex 740 Motherboard Diagram

On the Mini Tower diagram, these are the long vertical slots to the right of the CPU area. A standard CR2032 lithium battery to maintain BIOS settings

: One 9-pin Serial port and one 25-pin Parallel port . and front USB.

Below is a text-based representation of major components on the board (viewed from top, I/O panel at left):

Unlike other Dell models that use pins 10 and 11 for thermal data, the OptiPlex 740 utilizes pins 12 and 13 for its air temperature sensor.

: A 40-pin connector for power button, diagnostic lights, and front USB.