Pbq Comptia
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a green LED indicator light is flickering
Shows activity, no problem detected
system shuts down from overheating
Check fan operation and clean if needed.
Computer is connected but no indicators light up and system won't power on
Check power supply.
POST generates an error via beeps
Check codes in documentation
Loud, unusual noises coming from tower
Check fans and drives for obstruction or failure
Newly installed extra memory module is not recognized
Ensure the module is seated correctly
Power supply in place but shuts down and is not functioning properly.
Test power supply using multimeter
Receive error during boot sector load
Check for software or driver problems
Peripheral device connected but not recognized
Examine cable end and port for damage
Keyboard sticking and not functioning properly
Clean with compressed air and check connection.
CRT image geometry is distorted
Adjust image control knobs
Low color depth. Images appear blocky or grainy.
Check Display driver
Stuck or dead pixels
try to reactivate using software
Screen objects appear to large.
Adjust screen resolution or zoom.
Image appears very dim.
Adjust brightness and/ or contrast.
Artwork color output different than display's.
Calibrate color to output device.
Image burn-in creating ghosted elements.
Use automatic screensavers.
Color glitches. Purple or green horizontal lines.
Check or replace cabling
No image is displayed.
Ensure display is plugged-in and connected.
Unexpected STOP errors at startup.
Check display driver.
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