Dell Vostro 400 Owner's Manual - Page 172
Front panel USB, Controls and Lights, Connectors - sata hard drive
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Connectors Front panel USB Front panel audio HDA header Processor Memory Power 12V Power two 10-pin connectors one 10-pin connector one 775-pin connector four 240-pin connectors one 4-pin connector one 24-pin connector Controls and Lights Front of computer: Power button push button Power light blue light - Blinking blue in sleep state; solid blue for power-on state amber light - The blinking amber indicates a problem with the system board. A solid amber light when the system does not boot indicates that the system board cannot start initialization. This could be a system board or a power supply problem (see "Power Problems" on page 74). Drive activity light blue light - A blinking blue light indicates the computer is reading data from or writing data to the SATA hard drive or CD/DVD. Rear of computer: Link integrity light (on green light - A good connection exists between the integrated network adapter) network and the computer. off (no light) - The computer is not detecting a physical connection to the network. Network activity light (on yellow blinking light integrated network adapter) 172 Appendix