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Apple Computing Products:
macOS - Notebook Hardware
Light sensor causes PowerBook G4 to sleep
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<blockquote data-quote="sholmes" data-source="post: 714112" data-attributes="member: 65248"><p><strong>The cure for the common narcolepsy</strong></p><p></p><p></p><p></p><p>I have found the cure for this problem. After reading about this problem in a few placea and reading about the ambient light sensors (there are two), I did an inspection of the parts. The left hand ALS is rather small compared to the right hand side ALS. I came to the conclusion that it was the RIGHT side ALS which was having an issue. My thought being that with a logic board attached, it probably does all the logic. So with only the left hand ALS giving information, the computer was overreacting to low/no light. </p><p></p><p>I bought a replacement right side ALS <a href="http://www.macrecycling.com/right-ambient-light-sensor-pb-aluminum-15-15167-p-100772.html">from this place</a> for $15 and it cured the problem.</p><p></p><p>It was also mentioned in the thread that the options for controlling the automatic dimming had disappeared. This also cured that which leads credence to the theory that the logic is all in the right side ALS.</p><p></p><p>I hope this helps. Your post got me to the conclusion I was seeking.</p><p></p><p>-- Seth</p></blockquote><p></p>
[QUOTE="sholmes, post: 714112, member: 65248"] [b]The cure for the common narcolepsy[/b] I have found the cure for this problem. After reading about this problem in a few placea and reading about the ambient light sensors (there are two), I did an inspection of the parts. The left hand ALS is rather small compared to the right hand side ALS. I came to the conclusion that it was the RIGHT side ALS which was having an issue. My thought being that with a logic board attached, it probably does all the logic. So with only the left hand ALS giving information, the computer was overreacting to low/no light. I bought a replacement right side ALS <a href="http://www.macrecycling.com/right-ambient-light-sensor-pb-aluminum-15-15167-p-100772.html">from this place</a> for $15 and it cured the problem. It was also mentioned in the thread that the options for controlling the automatic dimming had disappeared. This also cured that which leads credence to the theory that the logic is all in the right side ALS. I hope this helps. Your post got me to the conclusion I was seeking. -- Seth [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
Light sensor causes PowerBook G4 to sleep
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