Is my power supply going bad?
Recently, I've discovered that if I plug my power supply into the wall, the tip lights up for about 5 seconds, then slowly fades. When this happens, the iBook suddenly stops charging. Am I looking at a bad power adapter or a bad DC-input jack? I notice that I can here a faint hum from the power supply- but I'm not sure if that's the natural hum or a bad one.
Okay, so here's an update- I found out that the power supply I receive with the machine is a 45W adapter. Apple's online kb articles say the iBook is supposed to have a 65W adapter. However, I've been using this power adapter for nearly a month, and it's never been problematic until just yesterday. Does my iBook need a higher wattage adapter to function?
Thanks to the comments below, I learned that either a 45W or 65W adapter will work. Having nothing to lose, I cracked open my power supply. I've found that my iBook will in fact charge with the cover off the adapter. When I press everything together, I hear a faint hum, and it turns off. I'm pretty sure that something somewhere is shorting out by touching something else when it's all put together.
Does anyone have any clue as to what could be shorting out?
Hi. The power ratings on the power adaptors are their maximum capacity. They do not jam 45 or 65 watts of power into the laptop they just have that capacity. For instance, if any of you are outboard boat owners you know that when you are puttering in to the harbor your 80hp motor is not running at 80 horsepower. It just has the "capacity" to produce 80 horsepower, but you have it throttled down.
Now in the cast of power adaptors, if you were trying to run a 17" ibook off a 45watt power adaptor it likely will work but will be "flat out" trying to charge a larger battery and maybe supplying more power to the logic board.
Running a 65 watt power adaptor on smaller iBooks just means you will always be running the adaptor "under" its maximum rated power output. Power is a product of voltage x current. These adaptors are likely rated for what they draw out the the wall outlet and not what they put "into" the computer.
Power Jack issues can cause several problems, some include not seeing the battery, not charging the battery, and not being able to run the laptop at all. I also found breaks in the cables as well as non functional bi-color LED indicators in the "lighted" ring on the Apple OEM adaptors.
The best solution I have for diagnosing the problems is to use or borrow someone else's known working iBook for comparison tests. You can easily narrow down a power adaptor cable problem
when its symptoms move to another laptop along with it.
Same problem here and I'm using a brand new aftermarket 65w power adapter. I was having this problem for a long time and i had to turn and twist the input jack to get it in the right contact position to charge. I purchased a new power adapter hoping it would resolve my issue, although its a little better, it's still a problem because i have to set a heavy object on the end of the input cable so it keeps contact during charging.
The only thing it can be is a bad DC input jack, or the internal power supply. Does anyone know where I can purchase those parts with installation instructions?