Macbook Pro Will Not Turn On Following Self-Repairs!

Are you absolutely certain that both MBPs are identical. On the bottom of the MBP is the serial number and enter them here:

https://selfsolve.apple.com/agreementWarrantyDynamic.do

Ciao.

Use this as a guide:

https://support.apple.com/en-us/HT204347

Ciao.

You may have missed something which will require that you go through the process again and make certain that every connection is solid. Don't feel bad, it took me two tries to get it right installing the logic board when I resuscitated my 2006 MBP.

From a software perspective, try SMC and NVRAM resets:

http://support.apple.com/en-us/HT201295

http://support.apple.com/en-us/HT204063

Ciao.

I did the same thing and found out I didn't get the ribbon cable for the keyboard seated. Which ties in with the power button. Do a recheck of all your cable connections.

Lets get this straight…

Your Macbook Pro 13"

Symptoms: dying trackpad & battery issue.

• Apple said you need a new top case
• Converted into 'frankenmac' by adding logic board from an Mac in unknown state

  Now will not power on at all

Girl's $50 Macbook Pro 13"

Symptoms: 'Crashed' – Any real diagnosis beyond that?

Your HD failed to boot this Mac at all, unclear if you actually tried other startup disks.

• Used as a logic board donor for your original Macbook Pro.

I hope OGELTHORPE & my ginger are correct & you simply missed a connection or two. Strip & recheck everything.

Otherwise to me it looks like you may have replaced a (possibly faulty - but that isn't confirmed) logic board with an 'unknown status' logic board. I can't understand why you are replacing parts that do not need replacing (e.g. the logic board, when your Mac apparently needs a new top case, battery and trackpad).

Ideally you need to work out if the $50 laptop can boot in a stable way - since it failed with your HD that puts it into the list of unknowns.

Personally I'd contemplate reverting your Mac to the original state, add her battery - expanding batteries they been known to cause trackpads to misbehave (possibly in other models). Then I'd move on to the trackpad & top case if those are still not working.

The OP has a Unibody MBP and in order to replace the topcase, everything must come out, including the logic board. In view of that, I probably would have chosen to swap the logic board myself. It is a tough call as to which is the better approach. 🙂

Ciao.

I understand that, but without seeing the second MBP boot successfully it makes it a questionable logic board donor, especially when the boot disk from the original MBP was working (that is presumption on my part - it isn't clarified in the original post).

Another option is to insert the original MBP logic board into the $50 case, it may be easier now it is in pieces. Use a bootable USB stick as a test OS if you don't have spare HD's. USB will run slow, but it may be enough to check the trackpad & keyboard. You probably want to setup a bootable USB installer as a quick & dirty 'known good' test OS…

http://diskmakerx.com/or

http://osxdaily.com/2013/10/23/create-os-x-mavericks-install-drive/

So the way I deal with the keyboard connector is to use a strip of blue tape attached to the backside of the flex cable:

Then positioning the flex carefully within the connector body, use the blue tape to wiggle and pull the flex into the connector body until it seats as shown:

Lock the connector down and you're done.

If the flex cable got damaged there is a way to turn on the MBP, bypassing the power button:

http://www.insidemylaptop.com/turn-on-macbook-pro-laptop-without-power-button-lo cating-power-on-pads/

Be absolutely sure that you have identified the correct pads. Use a tiny flat blade screwdriver that will just bridge between the two pads and short them together.

So what you want to do is to use the known good logic board in new MBP w/ the working keyboard.

Uhh, good luck.

Ok. Trying to get a handle on what you have do. Your MBP booted and ran, but had a faulty keyboard. So you took the new one you bought new and swapped all the parts from your original MBP into the one you bought to make use of the keyboard. And now the problem is,it only boots to a gray or white screen. No apple logo or Folder with question mark. What operating System does your original hard drive have on it? Do you have any install disks or bootable external drives? If the only thing wrong with yours was the keyboard and you now have a usable keyboard. Then it should now be booting. We are missing something here. If the keyboard functions,the logic board is good, it powers on and your internal drive is formatted and bootable , Then what about the hard drive cable?

I know it's more work. But I would have gutted the MBP you bought and put your known good parts from your MPB into the one you bought.Going by that something you have connected in the new one is not working. If you used the new MBP hard drive cable ,that could be the problem. It's trial and error and can be frustrating.