Dell OptiPlex GX520 - Manual (Page 11)

Clearing Forgotten Passwords
1. Follow the procedures in " Before You Begin ."
2. Locate the 2-pin password jumper (PSWD) on the system board, and remove the jumper to clear the password.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
NOTICE: This process erases both the system and administrator passwords.
Mini Tower Computer
Desktop Computer
Small Form Computer
Jumper Setting Description
PSWD Password features are enabled (default setting).
Password features are disabled.
RTCRST The real-time clock has not been reset.