Apple MacBook Pro 13 inch - No Video;Bad Video

MacBook Pro (13-inch) Symptom Charts — Startup and Power Issues 43
2010-09-14
No Video/Bad Video
Unlikely cause: hard drive, optical drive, top case, battery, power adapter
Quick Check
Symptom Quick Check
Power, but No Video
• Power
• No video
• fan, hard drive spin, or optical
drive reset sound
• sleep LED is on or went on
• light if Caps Lock pressed
1. Reset SMC.
2. Reset PRAM.
3. If no startup chime, verify with known-good
memory.
4. Verify with external monitor.
5. Press Option key on startup.
Deep Dive
Check Result Action Code
1. Characterize video issue
Dene whether the issue is a
bad image with backlight OR
no video issue. Verify whether
some image even distorted is
visible.
Yes Bad image quality,
go to step 5.
No No image seen or no
backlight, go to step 2.
2. Isolate peripherals as cause:
disconnect all peripherals,
external devices, Express
Card and display adapters if
present and verify that video is
displayed.
Yes Suspect peripherals as cause.
Reconnect one at a time,
verifying unit operation at
each stage.
No Go to step 3.
3. Adjust Brightness
Power-on unit , attempt to
adjust brightness to maximum
using brightness (F1/F2)
keys and verify that video is
displayed.
Yes Video displayed - Brightness
set to minimum, panel
backlight was inadvertently
turned o. If backlight returns
to low check for stuck F1 key
on keyboard.
No Go to step 4.
4. Reset SMC and verify that
system video is displayed.
Yes Corrupt SMC state preventing
video.
No Go to step 5.