Troubleshooting Hardware Issues 5.2 Flashcards
power issues
the power button is not connected properly to the motherboard
wall outlet is faulty
power cable to the computer is faulty
power supply is faulty
if wall outlet is faulty, what to do?
use a multimeter or voltmeter to test the power outlet:
US or Canada 110-120V /60Hz
Europe or Asia 220-240 V/ 50Hz
if a power supply is faulty
use a power supply tester
if power cables from power supply to components are faulty
test the detachable cables, check each pin on each side of the cable to verify full continuity
Power on self test (POST) issues
do diagnostic program inside the system firmware
1 short beep means
system is ok
2 short beeps
error code
no beep
power supply issue, motherboard problem, or faulty onboard speaker
continuous beep
problem with system memory modules or memory controller
repeating short beeps
power supply fault or motherboard problem
1 long and 1 short beep
motherboard problem
1 long beep, 2 or 3 beeps
video adapter error
3 long beeps
keyboard issue
displays an error whenever the operating system has issue
crash screen
problem with hardware that windows cannot solve
blue screen of death (BSOD)
problem with hardware that Apple cannot solve
pinwheel of death
the system display gives an exit code
Kernel panic
when the components are generating heat and it’s not cooling down, what you should do?
shut down the system and boot into the UEFI or BIOS
excessive exposure to thermal loads can cause permanent damage
plugging or unplugging cables causes wearing out, and pins are getting bent or damaged
physical component damage
modern systems are able to protect against overheating
overheating systems could reboot or shut down
increasing the page size in windows or the swap space in Linux
performance issues
inaccurate system date and time
motherboard have a battery to keep the real-time clock (RTC) in sync
most modern operating systems set the date and time automatically
non volatile type of memory that stores the BIOS settings and is built into the motherboard
Complementary metal oxide semiconductor (CMOS)
Stores data without being constantly refreshed
Non volatile RAM (NVRAM)
