If you need the Dell service tag, such as for warranty information, you can still obtain it from a remote computer. The system tag is usually located physically on the box or server. Instead of driving or asking someone else to get the system tag, you can type in a command at the command prompt and obtain the system tag information.
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Connect remotely to the Dell computer. If you're unable to connect, proceed to the Tips section.
Navigate to the "Start" menu and select "Run." In the Run dialog, type "cmd" (without quotes) and click "OK." The Command Prompt dialog opens.
Type "wmic bios get serialnumber" (without quotes). Press "Enter." The computer responds with information from the Dell remote computer. The information below "Serial Number" is the Dell system service tag.
To obtain the make and model number, type "wmic csproduct get vendor,name,identifyingnumber" (without quotes). Press "Enter."