Hardware Reference
In-Depth Information
Figure 6.20. Testing and troubleshooting memory.
First, let's cover the memory-testing and troubleshooting procedures:
1. Power up the system and observe the POST. If the POST completes with no errors, basic
memory functionality has been tested. If errors are encountered, go to the defect isolation
procedures.
2. Restart the system and then enter your BIOS (or CMOS) Setup. In most systems, this is done by
pressing the Del, F1, or F2 key during the POST but before the boot process begins (see your
system or motherboard documentation for details). Once in BIOS Setup, verify that the memory
count is equal to the amount that has been installed. If the count does not match what has been
installed, go to the defect isolation procedures.
3. Find the BIOS Setup options for cache and then set all cache options to disabled if your system
supports this option. Figure 6.21 shows a typical Advanced BIOS Features menu with the cache
options highlighted. Save the settings and reboot to bootable media containing the memory
diagnostics program.
 
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