Cables when extensively use tend to ... DIE ! Mac Laptops are no exception. I wanted to fix it, for a looong time.

Step 1: first : BRUTALITY !!!!!!

First locate the problem. For me the cable was dead on the thin cable at the beginning.

I didn't find any 'clever' way to open the transformer, maybe someone did an instructable called 'how to open a powerbook tranformer with ease', i didn't find it, sorry for this. So I opened it with a hammer and a few flat drivers with anger and sweating. Don't forget to unplug it before you start, don't forget to test it without the case (BE CAREFULL TEST IT WITOUT TOUCHING THE TRANSFORMER ITSELF, I GOT AN ELECTRIC SHOCK 220volts because i played with it while on).

After opening it, i discover that in the box, the cable was stopped by an ingenuous knot molded into a cube of plastic. This time delicately, not with a blade but with a sharp cutting pliers, I extracted the knot off the cube and unlocked the knot.
Hello just a thought. What I see in the first picture here does not appear to be helping anything there are piles of torsion on those cables. (well especially the big one) you would have been better to create a double back sandwich for each wire. It seems there would be enough room in your housing, and you wouldn't have to worry about pinching it in that unfortunate pipe wall mounting bracket. just to be super safe.
I disagree. The springs are attached to the box, on the third image they are not attached, they should, next step. the spring very well reduces cable torsion, simple mecanic fact, it is very difficult to bend at an angle, it is always a curve. Anyhow, please describe the double back sandwich please, I dont know what you mean. Thanks for comment.
uhm... what does this have to do with fire? whys it in the fun with fire section?
What is a Transformator?
hahaha !! sorry ! My english is not very very .... hum hum ... hehehe ! and the cinema influence ...hahah !! I meant transformer. Thanks, i corrected it on the instructable steps ! Cheers.
the "thing" just died after 2 years of service. RIP "thing".
It's transformer in polish (and perhaps other similar languages) ;P
The wood is probably preventing the heat from getting out rather than dissipating it more efficiently than the original plastic, even with those few holes. But I do have to admit that this is the ugliest (though maybe a little questionably safe) powerbook adapter that I've ever seen.
hehehe, you are right on every point, actually I don't even know if I would even recommend anyone to build it for it for oneself (that's an other debate : should we put only instructables that works-looks great ? I have just added this instructable to the &quot;<a rel="nofollow" href="http://www.instructables.com/group/crapiestgroupever/">groups : crapiest group ever</a>&quot; (VIP area). Maybe this one can be a good anti-exemple _ as announced as &quot;ugliest&quot;). The only fact that I'm happy with : it works.<br/>One day I will have to learn to let my appliances die ... hhuuhuh !<br/>
He's got plenty of ventilation for the little heat produced. I've never had to do something like this because Apple's warranty has always replaced any bad power supplies.
I like the thinking... He's got plenty of ventilation... I have never had to do something like this.... Apples warranty has always replaced the bad power supplies... Hmmmmmmmmmmmmm To the best of my understanding... Power supplies DO usually (I said usually) have thermal fuses in them, so when they get to a certain temperature, the fuse melts, the device gets no more power, and this prevents fires from starting... It may only giove off say 10W of heat... but in a confined space, from low thermally conductive materials, and given enough time, - without limits, even a small heat source can develop kind of astronomically high temperatures... Next time your in bed, using your laptop... allow the blankets to cover the power supply and check it every five minutes.... they DO get very very hot..... When they get hot enough, the fuse if it has one, that blows, if it doesn't, and what it is surrounded with, is flammable, there is a good chance you will get a fire going. Thje instructable is a good idea tho, to move the tension and flexing away from a rigid joint, and into a large radius bend.... Very good idea. Congrats on smart thinking.
I'd make something like this, but I'd either put in a small 40mm fan or I'd be cutting the center sections of the panels away... to make retention by the edges only... with some reinforcement.... Simple, strong and it keeps the crotch of the idea in place.. to flow the cable stress's away from the joint.
It looks sorta scary....I would fear Its fire starting capabilities....
You are totally right !! VERY NICE IDEA !! I HOPE IT WILL START BURNING ONE DAY !! At the moment, this wooden box is on the test, waiting to ignite my house ! So I posted this silly instructable on related groups : <br/><a rel="nofollow" href="http://www.instructables.com/group/destructables/">destructables</a><br/><a rel="nofollow" href="http://www.instructables.com/group/funwithfire/">fun with fire</a><br/><a rel="nofollow" href="http://www.instructables.com/group/pyro/">pyro !</a><br/>Thanks ! YAAAAAAAAYYYY !!!<br/>

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Bio: Protei Principal investigator [protei.org], Scoutbots CEO [scoutbots.com], Sugru Pro applications [sugru.com] Research & Design [cesarharada.com], Former MIT project leader, TED Senior Fellow.
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