Manual

MacBook Pro 17-inch (original, Core 2 Duo, 2.4/2.6GHz, 2008) Troubleshooting — Hardware Symptom Charts 17 8
If the number of subpixel anomalies exceeds the acceptable number listed in the above 3.
chart, replace the display panel assembly.
Replace
Bright 4 or more
Dark 6 or more
Combination 8 or more
If the number of subpixel anomalies is acceptable, explain to the customer that the pixel 4.
anomalies are within specications, and no repair is necessary.
Important: Do not release the specications to customers. Instead, inform them that a certain
number of subpixel anomalies are considered acceptable, and these factors apply to all
manufacturers using LCD technology—not just Apple products.
When speaking with customers, please use the following explanation:
Active-matrix LCD technology uses rows and columns of addressable locations (pixels) that
render text and images on screen. Each pixel location has three separate subpixels (red, green,
and blue) that allow the image to be rendered in full color. Each subpixel has a corresponding
transistor responsible for turning the subpixel on or o.
There are typically millions of these subpixels on an LCD display. For example, the LCD panel used
in the Apple Cinema HD display is made up of 2.3 million pixels and 6.9 million red, green, and
blue subpixels. Occasionally, a transistor does not work perfectly, which may result in the aected
subpixel being turned on (bright) or turned o (dark). With the millions of subpixels on a display,
it is quite possible to have a low number of faulty transistors on an LCD. Therefore, a certain
number of subpixel anomalies are considered acceptable. Rejecting all but perfect LCD panels
would signicantly increase the retail price for products using LCD displays. These factors apply
to all manufacturers using LCD technology—not just Apple products.
ExpressCard/34
ExpressCard will not insert into the ExpressCard slot
Make sure the ExpressCard is 34mm in width. The general ExpressCard standard does allow 1.
for 54mm cards which will not t in this slot.
Make sure the ExpressCard is oriented right side up (cards are keyed and cannot be inserted 2.
upside down).
Verify that the ExpressCard is not warped or damaged in any way; if so, replace the card.3.
Try a dierent ExpressCard.4.
Carefully raise the ExpressCard slot cover and check for a foreign object inside the slot.5.
If the slot cover is preventing the card from being inserted, the door may be catching on the 6.
top of the ExpressCard mechanism. Adjust the position of ExpressCard cage on the left I/O