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Other BIOS Troubleshooting Tips

Use Table 3.6 to help solve some other typical system problems through BIOS configuration settings.

Table 3.6 Troubleshooting Common BIOS-Related System Problems

Problem

Solution

Notes

Can't access system because password(s) for startup or setup access aren't known.

Passwords are stored in CMOS nonvolatile RAM (NVRAM) and are configured through BIOS.

Remove battery on motherboard and wait for all CMOS settings to be lost, or use MB jumper called clear CMOS; before clearing CMOS, view bootup configuration information and note hard drive and other configuration information because all setup information must be reentered after CMOS is cleared.

System wastes time detecting hard drives at every bootup.

Disable automatic drive detection in BIOS lock in settings for drives by using Detect Drives option in BIOS.

Use automatic drive detection if you are frequently changing drives.

System drops network or modem connection when system is idle.

Power management not set correctly for IRQs in use by modem or network card.

Determine which IRQs are used by devices, and adjust power management for those devices; disable power management in BIOS.

Parallel or serial port conflicts.

Change configuration in BIOS.

See Chapter 6, "Serial and Parallel Ports and Devices," and Chapter 7, "USB and IEEE-1394 Ports and Devices," for details.


For more about troubleshooting and adjusting BIOS configuration settings, see Chapter 5 of Upgrading and Repairing PCs, 13th Edition, published by Que.

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