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Ch 4 trouble shooting and adding cards fully solved graded A+ already passed
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Ch 4 trouble shooting and adding cards fully solved graded A+ already passed
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Ch 4 trouble shooting and adding cardsWhat should you check first if USB isn't working? - correct answer ✔✔the power and cable
-plug in more USBs to see if they work in that port
--if it doesn't, swap the hub or plug it into a different port
what if some USB hub ports work and others don't? - correct answer ✔✔attach an external power
source to the hub, change the configuration if needed, and retest
USB ports provide power at___ ___ - correct answer ✔✔different levels
how to verify how much power a USB device uses - correct answer ✔✔1- expand USB hub controllers
section in Device manager
2- click on each generic USB hub option and select properties
3- click details, and use property dropdown to click power data
4- in current power state section, look at D0-D3 state. D0= full power, D3 is lowest power or sleep
How to you re-enable a USB port if the computer shuts it off due to using too much power? - correct
answer ✔✔restart the computer
if a USB device uses less than ____ mA of power, that USB port never activates - correct answer ✔✔50
use device manager to make sure the USB doesn't have a shared IRQ with another ____-____ device -
correct answer ✔✔Non-USB
what if a USB device stops working on a hub that has an external power source? - correct answer
✔✔remove external power and retest
what happens when a self powered USB hub gets its power disconnected? - correct answer ✔✔the hub
becomes a bus-powered hub and outputs lower power on each port.
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