Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 114

4-20 Compaq Professional Workstation AP550 Maintenance and Service Guide Table 4-11 Network Problems continued Problem Network controller stopped working without apparent cause. Cause 1. The files containing the network drivers are corrupted. 2. The cable is not securely connected. 3. The network controller is defective. Solution 1. Reinstall the network drivers, the Compaq Restore CD, then run Computer Setup. 2. Be sure the cable is securely attached to the network connector and the other end of the cable is securely attached to the correct device. 3. Replace the network controller or the system board. Audio Hardware Conflicts Hardware conflicts occur when two or more peripheral devices contend for the same signal lines or channels. Conflicts between the audio interface and another peripheral device may be due to the settings of the base I/O addresses, interrupts, or DMA channels. The audio interface typically has the following settings: s Base I/O address 220H s OPL III I/O address 388-38Bh s Interrupt IRQ 5 s 8-bit DMA Channel 1 and Channel 0 or 3 If you are unsure of the settings of the peripheral boards, you can isolate the source of the problem by temporarily removing all boards and then reinstalling each board, one at a time, until the board that is causing the conflict is found.