72 | Contacting Technical Supportw w w . d e l l . c o m | s u p p o r t . d e l l . c o mLocating Serial Numbers• The chassis serial number is below the barcode on the sticker on the back of the chassis.• The serial numbers for the RPM, line cards, fan tray, and supply units are below the barcode on thesticker on the front of each component.Requesting a Hardware ReplacementTo request replacement hardware, follow these steps:Downloading SoftwareUpdatesLog in to iSupport, and select the Software Center tab.Technical Documentation Log in to iSupport, and select the Documents tab. This page can be accessed withoutlogging in via the Documentation link on the iSupport page.Contact Information E-mail: Dell-Force10_Technical_Support@Dell.comWeb: www.force10networks.com/support/Telephone:US and Canada: 866.965.5800International: 408.965.5800Step Task1 Determine the part number and serial number of the component. To list the numbers for all components installed inthe chassis, use the show inventory command.NOTE: The serial numbers of fan trays and AC supplies will not appear in the hardware inventory listing. Checkthe failed component for the attached serial number label.NOTE: Quickly reinsert the fan tray back into the chassis once you have noted the serial number.2 Request a Return Materials Authorization (RMA) number from TAC by opening a support case. Open a support caseby:• Using the Create Service Request form on the iSupport page (see Contacting the Technical Assistance Center).• Contacting Dell Networking directly by E-mail or by phone (see Contacting the Technical Assistance Center).Provide the following information when using E-mail or phone:• Part number, description, and serial number of the component.• Your name, organization name, telephone number, fax number, and e-mail address.• Shipping address for the replacement component, including a contact name, phone number, and e-mail address.• A description of the failure, including log messages. This generally includes:• the show tech command output• the show trace and show trace hardware command output• for line card issues, the show trace hardware linecard command output• console captures showing any error messages• console captures showing the troubleshooting steps taken• saved messages to a syslog server, if one is used• The support representative will validate your request and issue an RMA number for the return of the component.