Re: No Trackpad a1278
Thanks I will have a read up on it anyway. I do feel a bit out of my depth and cant believe I got this far on my first board. Plenty of mistakes, a lot of luck and a lot of help along the way. ������
microwave
Member
Last Activity: 03-11-2023, 04:36 PM
Joined: 01-16-2022
Location: Ireland
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Re: No Trackpad a1278
I will give the previous owner a few days to try turn off Find My Mac.
If he doesn't I will just try and wipe it and see what happens.
Im afraid Im totally new to this and had to google a lot of the terms above.
Worst case I will have to bring to a professional.
As for lost mode that shouldn't be activated as he sold it to me.
The options button is currently working if that's what you mean.
As for the donor board its an older model so not sure if U6100 would be compatible, lucky U5805 was.
I don't know...Leave a comment:
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Re: No Trackpad a1278
I can see Find My mac is still enabled. Do you think this will disable that too ?.
Hard to believe wiping the hard disk will disable find my mac....Leave a comment:
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Re: No Trackpad a1278
That's great news, I would be happy if I can get to Catalina without too much hassle. I would be afraid to go higher incase I bricked it or maybe the computer might not be able to handle it and be too slow.
Thanks again, I really was convinced I was in trouble. 👍👍👍Leave a comment:
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Re: No Trackpad a1278
Hi I finally got the a1278 fully working tonight.
I had the trackpad working but when I took your advice and changed the enamelled wire to a more appropriate size it stopped working.
Then in fault finding I shorted another chip and could no longer get green light.
Then got back to green light but still no trackpad so ended up buying a doner board and replacing U5805 and everything finally working.
But unfortunately I now have a bigger problem.
The previous owner says they removed the iCloud from their account but I don't think...Leave a comment:
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Re: No Trackpad a1278
So do you recommend that I change to a larger wire?
I do have a larger size enamel coated wire, but its a good bit bigger and won't fit through the via hole, but that's not a problem.
Do you have a PayPal account, would like to buy you a drink.
ThanksLeave a comment:
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Re: No Trackpad a1278
Again thanks for the fast reply.
You were right I did have 5v on U7200 pin 17 and no continuity between R5805 and U7200 pin 17.
So I ran a 0.1mm wire and now the trackpad seems to be working, but I haven’t really had time to fully assemble and test.
Im actually surprised it was just one wire, as I thought a few of the voltages on flex connector J5800 were a bit erratic.
Also I presumed I should be measuring 18.5v on pin 22, but as you said that needs to be enabled first and then powered by the trackpad itself....Leave a comment:
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Re: No Trackpad a1278
Firstly thanks for the fast reply.
My board is marked as the B version
I never new about the NO STUFF marking, that's very helpful, but unfortunately that isn't mentioned on the components im missing.
I did try replacing the flex already but when it didn't work I done a bit of digging only to find I was missing the 18.5v on the motherboard flex connector J5800, I will attach an image displaying the voltages im getting, along with a screen shot of the schematic im working off.
I do have PP3V3_S4_TPAD on pin 22
Im missing...Leave a comment:
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No Trackpad a1278
Hi I'm new to the forum and hoping to learn a bit along the way.
I recently purchased an old water damaged macbook to help me learn a bit more about electronic, schematics and board views.
I have managed to get around a lot of problems. I have it turning on and even charging now. The only problem Im seeing at the minute is the trackpad.
I just can't understand the trackpad circuit.
I finally realised I'm missing the 18.5v on the Trackpad connector J5800, which lead me to U5701 which has power but I noticed pin 21 was missing 18.5v.
USB_TPAD_P... -
Re: Macbook Pro 13" 820-3115-B (help for LVDS line components)
Hi thanks for the fast reply, I have no problem paying for the schematic. the problem is I have other a1278 820-3115B schematics but some say J30 in title and other don't until you open the schematic.
Im just wondering is there different models of the a1278 820-3115B, probably unlikely.
Suppose what I really need is good photos of each side of the board.
Its weird I must be missing not far off ten components and the only thing that's not working is the trackpad. Just feels like I have the wrong...Leave a comment:
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Re: Macbook Pro 13" 820-3115-B (help for LVDS line components)
Hi are you using the a1278 J30 Schematic ?.
I also have a a1278 820-3115B board which I purchased with liquid damage but having problems with the trackpad, when I opened the computer up it looks like either a lot of components were removed or maybe never installed on this model, the seller says no work was done to it other than corrosion, the pads look like they were never touched.
Im just wondering if there is another schematic for the a1278 820-3115B.
All I can find is a schematic with J30 in...Leave a comment:
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Re: MacBookPro Unibody 13 A1278 J30 Schematic
Hi im trying to get my hands on a boardview and schematic for a1278 820-3115-B
I see you have supplied a schematic any chance of a boardview.
Im a little confused where the J30 comes from as my board doesn't have that on it.
I did try other a1278 files but they don't seem to match my board perfectly, for example one chip on the board has six legs but the boardview and schematic had only four.
Maybe there is different versions of the a1278 820-3115-B
Thanks...Leave a comment:
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