Power, but No Video (Computer begins to power up, the fans and hard drive spin, the Caps Lock key lights up when pressed, but there is no startup chime or video.)
Note: Examine the display carefully. An image may be barely present on the screen, but with no backlight clearly illuminating the image. In this case, the system is working properly except for the backlight.
Reset the SMC (power manager) as described in “1. Resetting the System Management Controller (SMC)” under “Troubleshooting Tips and Tricks” in the previous section.
Try connecting an external display to check for intact video signal.' If external video appears, 2. check the system for any pending software or firmware updates and update accordingly.
Verify that the LVDS cable connection is properly seated to its connector on the logic board 3. and that the cables are not damaged.
Replace the display assembly.4.
Check all cable and flex connections to the logic board. Try restarting.5.
Replace the logic board.
6 Comments
@Anthony DeFreitas, same issue as the original question "First we need to know your exact machine. Please give the last three figures of your serial number. " from mayer.
by oldturkey03
@oldturkey03 Sorry, I had a brain fart and posted the model # thinking I was posting the serial #.
The last 3 of my serial are "YAL"
Thanks.
by Anthony DeFreitas
Anthony DeFreitas, does this look like the specs for your MBP:"
2.2 GHz Core 2 Duo (T7500)
Intro Date: June 5, 2007 Disc Date: February 26, 2008
Order No: MA895LL Model No: A1226 (EMC 2136)
Subfamily: Mid/Late 2007, 2.4/2.2GHz* Model ID: MacBookPro3,1
Std RAM: 2 GB Std VRAM: 128 MB
Std Storage: 120 GB (5400 RPM) Std Optical: 8X DL "SuperDrive"
by oldturkey03
Have you tried an external display? There were issues with NVidia Chipset. What to look for:
Distorted or scrambled video on the computer screen
No video on the computer screen (or external display) even though the computer is on
Specific products affected:
MacBook Pro 15-inch and 17-inch models with NVIDIA GeForce 8600M GT graphics processors
MacBook Pro (17-Inch, 2.4GHz)
MacBook Pro (15-Inch, 2.4/2.2GHz)
MacBook Pro (Early 2008)
These computers were manufactured between approximately May 2007 and September 2008
Products Affected
MacBook Pro, models with NVIDIA GeForce 8600M GT graphics processors
by oldturkey03
@oldturkey03 Yes, that looks like what my original specs were. When it first happened you could see video on the screen (just barely, it was very dark) for a week or so but after that only on an external display where the video is perfect. I'm at step 4. Is the display assembly one part or a combination of parts?
@mayer right in the middle of the key board and I'm assuming some drops trickled down inside.
by Anthony DeFreitas
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