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Aktuelle Version von: mayer ,

Text:

Try relpacing the ambient light sensor. Apple Part # 922-8353 for the left.
 
http://www.ifixit.com/MacBook-Parts/MacBook-Pro-15-Inch-Model-A1260-Left-Ambient-Light-Sensor/IF185-115
 
Here's how to do it: [guide|675]
 
This sounds similar to the "Narcoleptic Aluminum PowerBook Syndrome". Symptoms include the PowerBook suddenly entering sleep mode, no matter what the battery level is or if it is plugged in. One cause is the ambient light sensing, and associated instruction set coding, with possible keyboard backlight and sleep light issues accompanying the so-called "narcolepsy". Another cause is the trackpad heat sensor monitoring the trackpad; system logs report "Power Management received emergency overtemp signal. Going to sleep." To correct this, service groups will often replace the motherboard or power converter, but the actual fix (depending on the model) for the first cause is to replace or remove the left or right ambient light sensors; and for the second cause, disconnect, remove, or replace the heat sensor, or the entire top case which holds the trackpad heat sensor. Alternatively, there are reports which detail success in removing certain sensor kernel extensions or rebuilding the kernel using the Darwin Open Source project after commenting out the relevant sleepSystem() call; though permanent solution of the sleep issue in this manner is little documented.

Status:

open

Bearbeitet von: mayer ,

Text:

Try relpacing the ambient light sensor. Apple Part # 922-8353 for the left.
 
http://www.ifixit.com/MacBook-Parts/MacBook-Pro-15-Inch-Model-A1260-Left-Ambient-Light-Sensor/IF185-115
 
This sounds similar to the "Narcoleptic Aluminum PowerBook Syndrome". Symptoms include the PowerBook suddenly entering sleep mode, no matter what the battery level is or if it is plugged in. One cause is the ambient light sensing, and associated instruction set coding, with possible keyboard backlight and sleep light issues accompanying the so-called "narcolepsy". Another cause is the trackpad heat sensor monitoring the trackpad; system logs report "Power Management received emergency overtemp signal. Going to sleep." To correct this, service groups will often replace the motherboard or power converter, but the actual fix (depending on the model) for the first cause is to replace or remove the left or right ambient light sensors; and for the second cause, disconnect, remove, or replace the heat sensor, or the entire top case which holds the trackpad heat sensor. Alternatively, there are reports which detail success in removing certain sensor kernel extensions or rebuilding the kernel using the Darwin Open Source project after commenting out the relevant sleepSystem() call; though permanent solution of the sleep issue in this manner is little documented.

Status:

open

Bearbeitet von: mayer ,

Text:

Try relpacing the ambient light sensor. Apple Part # 922-8353 for the left.
Try relpacing the ambient light sensor. Apple Part # 922-8353 for the left.
 
This sounds similar to the "Narcoleptic Aluminum PowerBook Syndrome". Symptoms include the PowerBook suddenly entering sleep mode, no matter what the battery level is or if it is plugged in. One cause is the ambient light sensing, and associated instruction set coding, with possible keyboard backlight and sleep light issues accompanying the so-called "narcolepsy". Another cause is the trackpad heat sensor monitoring the trackpad; system logs report "Power Management received emergency overtemp signal. Going to sleep." To correct this, service groups will often replace the motherboard or power converter, but the actual fix (depending on the model) for the first cause is to replace or remove the left or right ambient light sensors; and for the second cause, disconnect, remove, or replace the heat sensor, or the entire top case which holds the trackpad heat sensor. Alternatively, there are reports which detail success in removing certain sensor kernel extensions or rebuilding the kernel using the Darwin Open Source project after commenting out the relevant sleepSystem() call; though permanent solution of the sleep issue in this manner is little documented.

Status:

open

Ursprünglicher Beitrag von: mayer ,

Text:

Try relpacing the ambient light sensor.

This sounds similar to the "Narcoleptic Aluminum PowerBook Syndrome". Symptoms include the PowerBook suddenly entering sleep mode, no matter what the battery level is or if it is plugged in. One cause is the ambient light sensing, and associated instruction set coding, with possible keyboard backlight and sleep light issues accompanying the so-called "narcolepsy". Another cause is the trackpad heat sensor monitoring the trackpad; system logs report "Power Management received emergency overtemp signal. Going to sleep."  To correct this, service groups will often replace the motherboard or power converter, but the actual fix (depending on the model) for the first cause is to replace or remove the left or right ambient light sensors; and for the second cause, disconnect, remove, or replace the heat sensor, or the entire top case which holds the trackpad heat sensor. Alternatively, there are reports which detail success in removing certain sensor kernel extensions or rebuilding the kernel using the Darwin Open Source project after commenting out the relevant sleepSystem() call; though permanent solution of the sleep issue in this manner is little documented.

Status:

open