Cleaning a Thunderbolt Port On a MacBook Pro 8,3?

I'm trying to connect a larger monitor to this MacBook. I know the standard response to this is compressed air, and while that helped, it's still not a usable image. It will continually lose the connection. I blasted it pretty good.


I also checked for any updates through System Update. It's current.


The machine has lived in a metal fabrication shop for years. All kinds of fine particulate material in the air.


I thought I'd ask before I do damage. A Q-tip, possibly with alcohol or some other special cleaning agent? Anybody else had this problem and found a solution?

MacBook Pro

Posted on Feb 21, 2019 11:50 PM

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Posted on Feb 22, 2019 12:20 AM

Try using a toothpick to scrape both sides of the connector, then holding the laptop with the port facing the floor, blow compressed air in it. You may need to use a knife to narrow the toothpick to fit properly. Since you are in a machine shop, it might be best to disconnect the battery in case any metal dust shorts out pins on the connector.


For a really dirty port, I would remove the battery so the system has no power. A Q-tip may be too large, but maybe you could flatten it with pliers first or create your own smaller version with a toothpick & cotton or other thin material which you can moisten with rubbing alcohol. They do sell some very small sticks with cotton ends the size of toothpicks. Be gentle as it is easy to break the center tab.


I've used a small jewelers flat blade screwdriver on a couple really dirty ones since the dirt/corrosion was too embedded, but you must be very careful as you can easily lift & damage the contacts. If you leave the battery connected, you may short pins with power and destroy the Logic Board. Make sure to let the rubbing alcohol dry out before reconnecting the battery or power (surprisingly it can take a while sometimes).


Dont forget to check the Display cable connector as well. Plugging & unplugging the cable a few times after cleaning may also help to further clean the port.


FYI, I've seen a lot of Display cables with broken wires at the connector end. They either bend the cable at the connector or they pull on the wire to disconnect it and end up breaking the wire internally. Sometimes you can wiggle them and the image appears & disappears. If this is the case, you may be able to create a splint using wire sheathing and epoxy. If it is a broken wire, it can be replaced by an Apple service tech. Sometimes it is very difficult to tell if it is the connector wiggling in the port or a broken wire.

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Feb 22, 2019 12:20 AM in response to Jim361036

Try using a toothpick to scrape both sides of the connector, then holding the laptop with the port facing the floor, blow compressed air in it. You may need to use a knife to narrow the toothpick to fit properly. Since you are in a machine shop, it might be best to disconnect the battery in case any metal dust shorts out pins on the connector.


For a really dirty port, I would remove the battery so the system has no power. A Q-tip may be too large, but maybe you could flatten it with pliers first or create your own smaller version with a toothpick & cotton or other thin material which you can moisten with rubbing alcohol. They do sell some very small sticks with cotton ends the size of toothpicks. Be gentle as it is easy to break the center tab.


I've used a small jewelers flat blade screwdriver on a couple really dirty ones since the dirt/corrosion was too embedded, but you must be very careful as you can easily lift & damage the contacts. If you leave the battery connected, you may short pins with power and destroy the Logic Board. Make sure to let the rubbing alcohol dry out before reconnecting the battery or power (surprisingly it can take a while sometimes).


Dont forget to check the Display cable connector as well. Plugging & unplugging the cable a few times after cleaning may also help to further clean the port.


FYI, I've seen a lot of Display cables with broken wires at the connector end. They either bend the cable at the connector or they pull on the wire to disconnect it and end up breaking the wire internally. Sometimes you can wiggle them and the image appears & disappears. If this is the case, you may be able to create a splint using wire sheathing and epoxy. If it is a broken wire, it can be replaced by an Apple service tech. Sometimes it is very difficult to tell if it is the connector wiggling in the port or a broken wire.

Feb 27, 2019 3:34 PM in response to Jim361036

If the Mini Display Port (or Thunderbolt port) does not have scorch marks, then it should be possible to clean it. I know it is very hard to see the pins. I've used a Q-tip like wooden stick and used pliers to flatten the cotton & wood just enough to clean the port. Maybe the same can be done with a Q-tip. You must be very careful as it is very tight fit. Even a small piece of plastic might be enough to clear the dirt to make it work. Sometimes just plugging & unplugging multiple times while wiggling it a bit can be enough to clean the pins.


If it is not a mini-Display Port or Thunderbolt port, can you provide the exact model of your laptop from "About this Mac"?


Are you sure your cable is good? Or the input on the monitor?


As for a FireWire video adapter, I have never looked for one so I cannot provide guidance there.

Feb 22, 2019 1:14 AM in response to HWTech

I really appreciate the detailed response. Thank you!


I will give this a shot and reply back with the results.


The cables (and monitor) are brand new, for what that's worth. I have gotten bum cables before.


I was most curious about the solution to use, if any. Damaging this port would be damaging the MB. Swapping a MB on any laptop is never fun.

Feb 27, 2019 12:53 AM in response to HWTech

Update:


My apologies. I may have misidentified the port in question. You said to be careful of the center tab, but that is not the port in question. See attached pic.


I looked for the smaller swabs without luck. So I armed myself with q-tips, rubbing alcohol and a can of multi-purpose duster for electronics. Thinking that might be a better solution for blasting it out as it has a directional tube so I can really get in there. No dice. The diameter of the q-tip "stick" is way too big to get into the connector, nevermind the swab.


So I called the Apple Store just to see what they might suggest. Basically, they told me that I could bring it in and their techs would do what they could. Not sure what that means, as I wasn't able to speak with a tech. It was also mentioned that there were no guarantees as this was a legacy, classic, vintage... - I can't remember exactly the word she used to express to me this machine was old! I asked if it would cost anything, she didn't know.


Unfortunately, where I am located now is quite some distance from the closest Apple Store. Based on the phone call, it really didn't seem as though the trip would be worth it.


I did look up this MB to see what an aftermarket unit would go for: $50-$125. Not too bad. But again, I don't know the history of those boards and I may end up in the same boat. Nevermind that I don't want to climb inside this thing if I can avoid it.


At this point, I am wondering if maybe there was another way to connect an external monitor using a different port? And if that is possible, would I be coming up on some other limitations on resolution? I need to do a little more homework to that extent.


In the meantime, I'd love to hear anybody's 2 cents on this.

Feb 27, 2019 2:33 PM in response to Jim361036

The monitor I am trying to connect to has DisplayPort/HDMI/DVI-D/VGA inputs.


The Thunderbolt port is probably beyond repair. I wanted to connect using this.


This model Macbook Pro has a FW800 port. I have been searching the web but coming up with conflicting info regarding it's use and monitors.


Is there an adapter that will work from FW800 to one of the ports on my monitor?


Resolution of the external monitor is 2560x1440


Thank you

Feb 28, 2019 9:09 AM in response to HWTech

Hmmmm. That's interesting. Yet something else to consider.


This computer lives in a filthy environment. (Metal fabrication shop.)


The port doesn't 'appear' dirty, but it is quite small. I know the contacts are tiny and it wouldn't take much.


I've seen the output of laptops with GPU problems. It's possible that could be the issue here.

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Cleaning a Thunderbolt Port On a MacBook Pro 8,3?

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