Dell OptiPlex NX1 Service Manual - Page 59
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the tests are completed or stopped, the total number of errors is reported; there is no error log. The server-based diagnostics consists of the following test groups: Coprocessor Tests - Check the math coprocessor's numerical calculation and error-handling abilities CMOS Confidence Test - Checks the NVRAM for accessibility and reliability of data storage DMA Controller Test - Checks correct operation of the DMA controller Timers Test - Checks the timers used by the microprocessor RTC Test - Confirms the functionality and accuracy of the computer's RTC PIC Test - Generates an interrupt on each IRQ line to verify interrupt controller operation Speaker Test - Checks the functionality of the speaker by generating tones Video Tests - Verify proper operation of the video controller and the video control circuitry USB1 Tests - Check the USB interface registers and the USB controller Serial Port 1 Tests - Check the computer's interface with external devices connected through serial port 1 Serial Port 2 Tests - Check the computer's interface with external devices connected through serial port 2 Parallel Port 1 Test - Checks several internal functions of the parallel port Mouse Test - Checks the functionality of the mouse controller and the operation of the mouse keys Keyboard Tests - Verify the correct operation of the keyboard and the keyboard controller chip Disk 0 Tests - Check the hard-disk drive controller and the storage capability of the hard-disk drive For a complete description of the server-based diagnostics, see "Server-Based Diagnostics" in the online Network Administrator's Guide. The hard-disk-based diagnostics contains tests that aid in troubleshooting all major components of the system. If it is not possible to run the server-based diagnostics or if the server-based diagnostics fails to reveal the source of a Basic Troubleshooting 2-7