Comptia A+ 220-802 Chapter 20 Flashcards
What is one main thing a computer needs in order to function properly to avoid any failures? pg 988
They need lots of clean, moving air to keep them functioning.
When cleaning a power supply fan which way should you blow the air to get rid of the dust etc? pg 988
blow the air from the inside of the case outwards, so you wont get anything inside the computer or back into the fan motor.
What is the definition of Chip Creep? pg 989
Chip creep refers to the problem of chips that, over time, would work their way out of the socket. Chip creep occurred due to thermal expansion; the contracting and expanding during system heat up and cool down.(its not very common in today’s PC’s)
What are some of the things you need to look for in a computer that has overheated or has a foul order coming from inside the PC? pg 990
melted plastic components and burn marks on circuit boards.
Motherboard manufacturers tend to use different beep codes to indicate different error messages. Where should you look to find out what each beep code is for a particular motherboard? pg 991
motherboard manufacturer’s website
When a port doesn’t appear to be functioning, make sure the following conditions are met: pg 991
1) The cables are snugly connected.
2) The port has not been disabled in BIOS Setup.
3) The port has not been disabled in Device Manager in Windows.
4) No pins are broken or bent on the male end of the port or on the cable being plugged into it.
Why is Identifying Memory Issues so difficult? pg 994
Because memory problems appear to be software issues when they occur. Examples= Blue Screen of Death,(GPFs)
True of False You should never try to repair or disassemble a power supply. pg 995
There is a high risk of electrocution, and the relatively low cost of a new power supply makes working on them something to avoid.
A PC that starts up briefly and then locks up is more than likely experiencing this problem? pg 995
experiencing overheating because of a heat sink or fan not functioning properly.
To troubleshoot overheating what should you do?? pg 995
first check all fans inside the PC to ensure they’re operating, and make sure any heat sinks are
firmly attached to their chips.
Hard disk system problems usually stem from one of three causes:
Pg 997
1) The adapter (that is, the SATA, IDE, or SCSI interface) is bad.
2) The disk is bad.
3) The adapter and disk are connected incorrectly.
Software utilities used to manage hard drives include these command lines? pg 997
Chkdsk, Format, Fdisk.
What are four things you should do to every time you work on a laptop? pg 1002
1) Document and label screw and cable locations.
2) Have a clear organization method for your parts and screws.
3) Refer to the manufacturer’s documentation.
4) Use the appropriate hand tools.
What is the first question and the one question everyone hates to be asked when trouble shooting a PC? pg 1002
Is it plugged in?
Dim or flickering displays on laptops are usually caused by ? pg 1003
a faulty backlight in the display panel or a failing inverter can cause these problems too.
