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When you troubleshoot a computer, there are a number of reasons to enter CMOS setup. Here are some specific situations.

1. You may need to change the boot order. If you are having problems with the operating system and you need to install it, you will need to boot off of the installation media. If the machine is set to go directly to the C: drive, then the CD or DVD will never load. But you can change it to boot off of the CD/DVD drive first.


2. If the CMOS battery dies. If the battery dies and the settings become scrambled, then you'd need to enter the CMOS settings and fix everything after changing the battery.


3. If the computer locks up at random. It is possible that the memory is being clocked too fast or is using the wrong latency settings. In some cases, it may be because someone tried to overclock the CPU. So you can fix any wrong values that cause system instability.


4. If you add new hardware devices. You might have to enable a hard drive socket that was disabled. Or maybe you just installed a PCI-e, generation 3 card, but it won't enter generation 3 mode. The CMOS might have a setting to enable that.

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βˆ™ 7y ago
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βˆ™ 7y ago

To configure initial state devices, different settings, devices detection & configuration.

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Q: When trouble shootig a computer why might you have to enter CMOS setup?
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