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Component (resistor?) broke off near ribbon cable (WiFi/Bluetooth)

Hey,

today I tried to upgrade my MacBook Pro with the usual SSD+HDD combo.

Therefore I tried to remove the old SuperDrive to fit in the new HDD frame.

Unfortunately super tiny surface mount component broke off while removing the ribbon cable. It was properly a resistor or something like that. It was mounted directly next to the ribbon cable connection the logic board with the WiFi/Bluetooth board. (component located in red rectangle. http://imageshack.us/photo/my-images/812... Photo by ifixit.com)

Luckily the computer still works fine. Both WiFi an Bluetooth function as usually.

Do I need to do something? Or can the missing component demage other parts of the logic board. (Still covered with AppleCare, btw.)

Any help is much appreciated.

Answered! View the answer I have this problem too

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Do you still have the part that came off?

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Thanks for your reply.

Yes. I still have it.

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3 Answers

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I highly recommend that you take the component and the motherboard or entire laptop to a local TV/electronics repair shop for them to resolder the component back in place. They should have all the necessary skill and equipment to accomplish the task. They will probably charge $20 - $50 USD for the repair or what ever their minimum charge for repair is - It is a 30 minute or less repair even if the solder pads received damage. The place you take it needs to have an LCR meter to determine what the component is and if polarity needs to be observed to properly reattach it. They also will need to have good optics. An Apple repair place will charge you $200 - $250 USD to do the repair.

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Thanks for answer. I went to two TV repair shops today. Unfortunately none of them could help me. They said that they don’t have the right equipment (special SMD soldering iron) to do the job.

I called another place and he promised me to take a look at the problem tomorrow. Even though he told me that he would use a regular iron? Can the component be damaged with such an iron? Do you know what kind of component this actually is?

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I went to the other TV repair place today. The guy looked at the component and said we would solder it back in place for 60 USD. He was pretty sure that it is a capacitor and not a resistor. Therefore the part can be soldered either way.

I just don't know if they guy is really sure what he is talking about. I don't want him to destroy my MacBook. He even said that the part is probably not even necessary.

What to you think, should I let him do the repair?

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Are you sure the capacitor/resistor thing isn't backwards? Because capacitors most often do have polarity, while resistors don't. I would look for a place that advertises PCB rework, BGA reballing, etc., because they are probably more likely to have the right equipment and knowledge. Solder.net is one here in the Chicago area, although I'm not sure they do work for end-users. You might also go to an Apple store and ask for a Depot repair, which will cost you about $250US. I wouldn't even tell them about the broken component. It's potentially more expensive, but at least you can be sure about what you're getting.

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Please forgive the delay in my reply, I have been out of town. You do not need a special SMD soldering iron to do the work. A low watt iron with a 1/64" conical tip will do the job every time for that type of component. The shop that told you that, must just have way too much business or not worth the salt in their bread. I'm scratching my head wondering how they repair circuit boards on TVs. I've been doing this work for 20 years and am not sure what they mean by that. The place that told you that they would use a regular soldering iron could be good - if they are going to test the component prior to soldering it in, to ensure if the component has polarity or not. Not all capacitors have polarity. Inductors and resistors do not have polarity. If it is a capacitor or an inductor it is there to filter the wave or to add stability to the circuit, otherwise the designer would have just put a resistor there as all 3 can change current. If you live in the US, say so, I can do the work & provide email in my profile

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Thanks for your answers so far to both of you.

Unfortunately I don't live in the US, but thanks for your offer. I will probably try yet another shop, may they will have a bit more experience with such problems.

newbie question: even if the part has polarity. how does the repair guy know the right direction to solder it on? just curious.

I will post a short status update after I visited the other shop in the next few days.

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He will just test with a probe what direction the electricity is flowing and put positive to positive and negative to negative(Hopefully).

Update

you are right they don't have positive or negative sides, so why would you need to check them for polarity? but on a board and anywhere else electricity in a dc system only flows in one direction their for they would only need to find out what end of the current is positive and what is negative because electricity flows from negative to positive, and if they have something like a logic probe it will tell them when the current is high or low.

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jeremy, how do you do that with resistors and inductors for example? none of those has a positive or negative side that could be measured. Your idea has a few flaws and you should revise that if you are trying to perform board level repair.

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randomguy, just to resolve this old question about the missing component. The component is a capacitor identify per schematic as C3422 0.1uF 20% 10V CERM 402 and a replacement would be part number GRM033R61A104KE15D and manufactured by Murata. In order to identify parts like this, is to use a pair of SMD smart tweezers. You can not check the value of a capacitor with a regular multimeter but would most likely use an ESR meter. I do agree with ABCellars about how to get it repaired, and wholeheartedly agree with you, for as long as your computer works, leave it alone ;-) Hope this helps, good luck.

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Thanks for your super-detailed answer. I actually did nothing and the computer still works. I believe everything is fine (hopefully). Best regards.

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