Apple Technician Guide - tim.id.au
Apple Technician Guide - tim.id.au
Apple Technician Guide - tim.id.au
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2010-08-05<br />
Built-in Keyboard Does Not Work Properly<br />
Unlikely c<strong>au</strong>se: LCD, hard drive, optical drive<br />
Quick Check<br />
Symptom Quick Check<br />
Built-in Keyboard Does Not Work<br />
Properly<br />
• Keystrokes not recognized<br />
• Locks up<br />
• Displayed characters don’t<br />
match<br />
Deep Dive<br />
1. In System Preferences: International: Input Menu,<br />
enable Keyboard Viewer. Select Show Keyboard<br />
Viewer from the Input Menu in the menu bar.<br />
Test the keyboard.<br />
2. Confirm correct keyboard layout is selected.<br />
3. Update to the latest system software.<br />
4. Press Caps Lock, if the Caps Lock light goes on<br />
to show at least a partial connection to the main<br />
logic board.<br />
Check Result Action Code<br />
1. If specific keys are not working,<br />
confirm if they are physically<br />
broken.<br />
2. Reseat keyboard flex cable to<br />
logic board and verify that all<br />
keys are functional.<br />
3. Disconnect and verify that<br />
keyboard flex cable is in good<br />
condition (no delamination or<br />
torn cable end, no missing or<br />
cracked tracks).<br />
Yes Refer to MacBook/<br />
MacBook Pro: Black Keycap<br />
Replacement” (HT4002) or<br />
“MacBook: White Keycap<br />
Replacement” (HT4003). If a<br />
keycap kit is available for this<br />
model, order kit and replace<br />
affected key(s).<br />
Go to step 4.<br />
If a keycap kit is not available<br />
for this model, replace<br />
complete top case.<br />
Go to step 4.<br />
No Go to step 2.<br />
MacBook Pro (15-inch, 2.53 GHz, M<strong>id</strong> 2009) Symptom Charts — Input/Output Devices 96<br />
K01<br />
Yes Issue resolved. X99<br />
No Go to step 3.<br />
Yes Go to step 4.<br />
No Replace top case. Go to step 5. K01