SONY PCGF490
Manual de Servicio

6. Touch pad test Tests the touch pad. Start pressing the keyboard surely from an end of a keyboard. The Fn key is disabled. Press �Fn+End� instead. 7. LED test Check that the LEDs start illuminating from the left of the LEDs. 8. Main memory test Tests the memory. 9. Main system test Tests the entire system including CPU, MATH and DMA. 10. Mouse test Tests the mouse. Move the cursor inside the white square mark ( instruction displayed. 11. Parallel loopback test Tests the parallel (printer) port. The jig is necessary. Connect the jig to the parallel port. 12. PC Card test Tests the PC card. The PC card tester jig is necessary. Insert and remove the PC card tester in accordance with instruction displayed. 13. Serial loopback test Tests the COM port. The serial loopback jig is necessary. Connect the serial loopback jig to the COM port. 14. Port Replicator connector test To perform this test, the port replicator and USB tester are necessary. 15. IrDA test Tests the IrDA communication. To perform this test, the PCG-N505, XR series computer is necessary for communication. 16. Video test Tests the circuit blocks related to the video display. Tests the various video modes. 17. IEEE1394 test Executes the data transfer test of the IEEE1394. 18. PPK test Tests the PPK. ) and operate the system in accordance with

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PCG-F420/F480/F490 (UC) 2-6