Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 92

Input/Output Devices, USB Port Does Not Recognize Known Devices

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Input/Output Devices USB Port Does Not Recognize Known Devices Unlikely cause: LCD, hard drive, optical drive Quick Check Symptom USB Port Does Not Recognize Known Devices USB-wired keyboard/mouse or USB flash drive not recognized Quick Check 1. Check the for latest software update. 2. Use Apple System Profiler to verify the computer recognizes the USB bus. 3. Test port with known good Apple keyboard or mouse. 4. Verify any USB hubs have sufficient power. Deep Dive Check 1. Reset SMC and clear PRAM. Was USB device recognized? Result Yes Action Issue resolved. No Go to step 2. 2. Is USB device receiving power Yes from USB port? Note: first device to need >500ma will get 1000ma, all others are No limited to

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MacBook (13-inch, Aluminum, Late 2008) Symptom Charts — Input/Output Devices
92
2010-06-15
Input/Output Devices
USB Port Does Not Recognize Known Devices
Unlikely cause:
LCD, hard drive, optical drive
Quick Check
Symptom
Quick Check
USB Port Does Not Recognize
Known Devices
USB-wired keyboard/mouse or
USB flash drive not recognized
1.
Check the for latest software update.
2.
Use Apple System Profiler to verify the computer
recognizes the USB bus.
3.
Test port with known good Apple keyboard or
mouse.
4.
Verify any USB hubs have sufficient power.
Deep Dive
Check
Result
Action
Code
1.
Reset SMC and clear PRAM.
Was USB device recognized?
Yes
Issue resolved.
No
Go to step 2.
2.
Is USB device receiving power
from USB port?
Note:
first
device to need >500ma will
get 1000ma, all others are
limited to <500ma.
Yes
Go to step 3.
No
Replace logic board.
M15
3.
Is the latest Mac-compatible
USB software driver for this
USB device installed?
Yes
Replace logic board.
M15
No
Obtain Mac-compatible USB
driver.