Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au
Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au
Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au
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2010-08-05<br />
No V<strong>id</strong>eo/Bad V<strong>id</strong>eo<br />
Unlikely c<strong>au</strong>se: hard drive, optical drive, top case, battery, power adapter<br />
Quick Check<br />
Symptom Quick Check<br />
Power, but No V<strong>id</strong>eo<br />
• Power<br />
• No v<strong>id</strong>eo<br />
• Fan, hard drive spin, or optical<br />
drive reset sound<br />
• Sleep LED is on or went on<br />
• Light if Caps Lock pressed<br />
Deep Dive<br />
1. Reset SMC.<br />
2. Reset PRAM.<br />
3. If no startup chime, verify with known-good<br />
memory.<br />
4. Verify with external monitor.<br />
5. Press Alt key on startup..<br />
Check Result Action Code<br />
1. Characterize v<strong>id</strong>eo issue<br />
Define if the issue is a bad<br />
image with backlight OR a no<br />
v<strong>id</strong>eo issue.<br />
Verify if some image, even<br />
distorted, is visible.<br />
2. Isolate Peripherals as c<strong>au</strong>se<br />
Disconnect all peripherals,<br />
external devices, and display<br />
adapters if present, and verify if<br />
v<strong>id</strong>eo is displayed.<br />
3. Adjust Brightness<br />
Power-on unit , attempt to<br />
adjust brightness to maximum<br />
using brightness (F1/F2) keys<br />
and verify if v<strong>id</strong>eo is displayed.<br />
4. Reset SMC and verify if system<br />
v<strong>id</strong>eo is displayed.<br />
Yes Bad image quality, go to step<br />
5<br />
No No image seen or no<br />
backlight, go to Step 2<br />
Yes Suspect peripherals as c<strong>au</strong>se.<br />
Reconnect one at a <strong>tim</strong>e,<br />
verifying unit operation at<br />
each stage<br />
No Go to Step 3<br />
Yes V<strong>id</strong>eo displayed - Brightness<br />
set to minimum, panel<br />
backlight was inadvertently<br />
turned off. If backlight returns<br />
to low check for stuck F1 key<br />
on keyboard.<br />
No Go to Step 4<br />
Yes Corrupt SMC State preventing<br />
v<strong>id</strong>eo.<br />
No Go to Step 5<br />
<strong>MacBook</strong> <strong>Pro</strong> (<strong>15</strong>-<strong>inch</strong>, <strong>M<strong>id</strong></strong> 2010) Symptom Charts — Startup and Power Issues 35
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