Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor EMC 2326

790 Questions View all

Is my keyboard cable in far enough?

Block Image

After attempting a repair to my macbook pro this weekend, I reassembled it. The power button does not work. I have read a bunch of topics on inserting the keyboard ribbon cable and how difficult it is, and that this cable routes the power button to the logic board. I have spent a lot of time fiddling with this cable. I've attached a photo of the cable in its current state. Is this in far enough or should it go in further? I just want to know if I should be looking into some other reason for why it isn't starting up. I get no signs of life when pushing the power button, but the LED on the charger does light up and the battery indicator lights up indicating a full battery. Thanks for any help!

Answered! View the answer I have this problem too

Is this a good question?

Score 0
Add a comment

3 Answers

Chosen Solution

Using a screwdriver didn't work for me to help insert my cable. (I had already lifted the retaining flap with my fingernail.)

But once I got the idea (from elsewhere) of using a tab of cellophane (or other) tape as a makeshift "handle" to "grab" the cable and pull it into the socket, I was able to insert it in just a minute or two.

I found that it helped to take a 3-inch (or so) piece of tape, no wider than the cable, and to fold about an inch of it back on itself to create a portion that wouldn't stick to the cable. I put the sticky part as far down the cable as I could easily reach, then used the folded-over part as a "handle" and pulled on that.

The advantage of folding it over to form the "tab" was that, when I tried unsuccessfully to pull the cable into the socket the first couple times, the tab didn't stick to the cable. (When the unfolded tape stuck to the cable the first couple times, I had to pry it off and start over. With the tab I could just re-align the cable and try again.

Was this answer helpful?

Score 4

Comments:

Thats exactly how I do it with most of these kapton cables ;-}

by

Add a comment

It's usually not very difficult to insert the keyboard ribbon cable. The hardest part is usually getting a grip on the ribbon cable itself, or seeing exactly where to slide it in. The one in the photo, however is a little more difficult since there isn't a "tab" on the ribbon to "angle" and pull or push the end of the ribbon cable into the connector. If you're a little older like I am ( early 40's), reading glasses are a big help. I got the most powerful common kind of $10 reading glasses I could find (I only use them for computer repair or looking at fine details on my iPhone 5). They have a "power" of +3.00. Reading glasses (cheap ones) usually come in +1.00, +1.25, +1.5, ... up to +3.00 power (strength/magnification).

After looking closer at the photo, and looking at the same connector on one of my 15" MacBook Pros (they look the same as the 13" MacBook Pros), it looks like the retaining flap is in the down/locked position. This flap is very short (thin) and runs the entire length of the connector on the opposite side of where the ribbon cable is inserted (in this photo, it's above the connector toward the top of the photo). It needs to be flipped up to insert the ribbon cable, then pushed down to lock it into place; hold the ribbon cable in.

In this case without a "tab" on the ribbon itself, you can use a pencil eraser to push the ribbon cable in, or your finger (if your finger is too dry and doesn't have any friction to push the ribbon cable in, it won't be able to get a grip). The ribbon cable slides into the connector very easily with very little friction, as long as the retaining flap on up on the other side of the connector. If the flap stays down when you're sliding in the ribbon cable, it won't go in far enough. Again, in this photo, it actually appears that the flap is in the down/locked position.

Sometimes, you can still see the traces (copper conductive paths inside the plastic ribbon) going into the connector, but barely. If too much is visible, as it would appear in the photo, then it wasn't inserted enough. I would suspect that you didn't release the retaining flap on the other side of the connector first.

Use a spudger to lift this retaining flap. If you don't have a spudger, your finger nail should easily get underneath it enough to lift it up. If you try sliding the ribbon cable in after lifting the retaining flap and it goes in farther, then you've got your answer!

The fact that your charger and battery LEDs are responsive is a good sign that your logic board is still OK. (Though, not conclusive!) The Battery and MagSafe connector are connected to opposite sides of the logic board.

Was this answer helpful?

Score 1
Add a comment

I don't think it's in deep enough. There's an easy way to getting it in easily.

I'll try to explain it best I can.

line up the cable and slide it in a little bit.

NEXT - crucial part

Use a flat head screw driver and you want to place it roughly in the middle of the cable between the cable and the aluminum case part. Use the screw driver to push the cable. Basically it would kinda look like a letter C.

\ = screw driver

C = Ribbon

What you want it to do is sort of have it like \C pressing a little bit with the tubing of the screw driver NOT the bit. Use your finger to slide it in. Don't put too much pressure with the screw driver or you might damage the cable. If you do enough of these you'll be able to do these without even using your finger!

Was this answer helpful?

Score 0

Comments:

I second this method. Its all about creating tension on the curve above the logic board level. Yolo way will prevent the ribbon cable disappearing under the logic board on you as you try to insert!

by

I use electricians tape. A small strip with the end folded over to make a handle.

by

Add a comment

Add your answer

dhelvick will be eternally grateful.
View Statistics:

Past 24 Hours: 6

Past 7 Days: 33

Past 30 Days: 135

All Time: 7,400