Fixing the Dreaded iBook Backlight?

Aliencow inquires: "I've recently bought an iBook, and it started having the very common backlight problem. Basically, there are two types of things that can cause the problem: either the screen hinges pinching the cables, which is pretty easy to fix if you're not scared of opening things up; or it could be the logic board, which is what happened in my case. I've heard of someone being able to fix it by doing a bypass operation on the board, soldering a wire before the break and soldering it directly on the backlight connector. Aside from that, however I haven't been able to find much about how to fix that particular problem. Have any of you iBook-owning Slashdot readers had to repair your iBook like this? Any hints? If my repair is successful I'll surely snap a bunch of pictures and make a website, as this is a problem that affects a lot of iBook owners."

Comments

yup, been there, done that

[crahan11]

I had that problem 6 months after I bought my ibook. Closing the lid halfway would make the backlight go off for no apparent reason. At first I thought it was the suspend mode kicking in, but since the little blinking light didn't come on and it started to happen when I barely touched the screen it had to be the backlight. Good thing it was still under warranty. On a side note: I had a problem with one the rubber feet a few months back. It kept falling out so I decided to go buy a new set at the local Apple Store. I was rather surprised to here the clerk tell me that they didn't sell those anymore. If I wanted to have the rubber thingies (or just one) replaced, I'd have to send it back to an Apple Service Center to have it replaced. In the end I decided that a big blob of glue would solve it a bit faster.

Not for the fainthearted

[mean pun]

The hinge fault and the motherboard fault are more frequently reported, but my previous iBook had a third variant of the problem: the video chip got partially disconnected by a motherboard that flexed too much. Distinguishing this problem from the hinge problem is easy: if wiggling the lid makes the problem appear or disappear, it's probably the hinge, if applying pressure to bottom of the iBook under the left palm rest helps, it's probably the video chip. I don't know how to recognize any other motherboard problems, but if it can be fixed with a bypass it must be a third version of the problem: the loose video chip can only be repaired by resoldering, but since it's a BGA chip that is impossible to do with ordinary tools.

I tried to repair it, but the only thing that fixed it permanently was forcing the control signal of the backlight (a PCM signal) to maximum by soldering a pullup resistor at a strategic point in the lid. I deliberately leave it as vague as this: you really should know what you're doing when you try this, and you should be able to fill in the details yourself. Google is your friend.

Have any of you iBook-owning Slashdot readers had to repair your iBook like this? Any hints? If my repair is successful I'll surely snap a bunch of pictures and make a website, as this is a problem that affects a lot of iBook owners."

Some repairs are documented online, but more are always welcome.

Disassembling an iBook is hard; reassembling it is even harder. Unless you really, really, REALLY know what you're doing, you're shouldn't try this. Even professional repairmen consider it a difficult machine to work on.

If you still want to do it, the procedure is roughly: remove bottom case, bottom shield, top case, top shield to expose the motherboard. Illustrations can be found online, but be prepared for surprises, in particular lots of sticky tape and screws at weird places. Most importantly: carefully document the origin of every screw you remove. I find it helpful to keep the screws from different disassembly steps separate, so that a sanity check can be done for each step of reassembly.

The video chip is located on the bottom side of the motherboard, under the harddisk, but again, resoldering a loose chip requires professional equipment. The wire loom to the display starts roughly under the 's' key, and goes through the left side of the hinge.

Right there with you guys...

[superdan2k]

My iBook is currently at Apple's repair center. But my story starts much earlier. I ordered my dual-USB iBook 500 the day after Steve announced them, in March of 2001. It took until early-June to receive it. I didn't want to finance the cost of AppleCare, so I figured I would buy it later. In October, I joined the ranks of the dot-com unemployed, effectively destroying my plans to order AppleCare that month. I wasn't particularly worried, though, as I had experienced no problems.

Fast forward to late April of 2002. I'm living at home, in my parents' basement piggybacking off their T1 (no shit), paying down debt via a combination of frugal rent-free living, unemployment checks and the odd freelance gig thrown my way. I'd sold my Win(D'OH!)s machine awhile back. I started getting mild electrical shocks from the metal rings around the footpads on the iBook, and the screen was flickering like mad and wouldn't go to full brightness. I needed to wrap things up on a freelance gig, so I called Apple, still well in warranty and got them to send me a box. It gets to be June 1st or so and I send it in. They repair it and I have it back in-hand less than 48 hours later, functioning perfectly. Life is good...up to a point. A choad at the Apple Store in the Mall of America tells me that I have 30 days in which to make a warranty claim if the repairs go bad.

~45 days after the repair, I'm out of my main warranty by a long shot, and I think I'm out of the repair service warranty. Problems begin to recur. Basically, I think I'm fucked, so I kinda decide to put off repairs until I absolutely have to. I'm back at work full-time and kicking ass on my bills, so I should be able to cover it. Well, about 120 days after the repair work was done, I'm in the Apple Store, looking at the toys, and I overhear mention that service work has a 90-day coverage. When I talk to the clerk about it, he tells me it's always been 90 days, and that he's sorry the other guy was wrong, but that there's nothing he or I can do about it.

So I stewed for awhile. Fast forward to 12/30/2003. In a fit of boredom at work, I drop an email to sjobs@apple.com, explaining the above...not asking for anything. I just want him to be aware of the communications disconnect in the store and expressed disappointment in the quality of the product.

I come home on 1/5/2004 and there's a message on my answering machine from someone at Apple that wants to discuss the email I sent to Steve. I think "practical joke" and then realize that I didn't tell anyone about the email. The guy and I finally make contact with each other last Thursday. He wants to hear the story, so I go into detail about it, again, and we talk for a bit. Then he says, "Well, we want to make this right. We'll cover it outside of warranty this one time. And you'll still get the 90 days of coverage on the repair work."

My jaw literally dropped. He hooked me up with the tech group, filed a repair ticket for me, and had a box sent Airborne Express overnight to me. I talked to the tech, and he told me that the work order ticket basically covered anything wrong with the laptop, including cosmetic damage. I nearly shit. So we went over the problems, and that was that.

I shipped the iBook out this Tuesday morning (1/13/2004). I spoke with the people at Apple today and they informed me that they had replaced the entire upper shell (cosmetic damage), several parts of the power subassembly, the little rubber footpads (god, how that warms my heart), and went down a laundry list of other items. They said it might get back onto a truck tonight to come home.

This isn't the first time that Apple has come through for me, I'm sure it won't be the last, but they've cemented me as a Customer For Life.