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Can a damaged I/O Flex Cable cause Trackpad problems? (A $460 problem)

Hi anyone who can help,

One day last week, out of seemingly nowhere, the cursor on my MacBook Pro 13" Retina Display (Mid 2014) started moving and clicking on its own. I initially thought I had been hacked! Only after watching for a bit, the cursor movements seemed random. After the movements subsided, I was able to regain total control of the trackpad movement, but the click button was completely unresponsive (you soon realize the trackpad click is the most important button on the computer). Everything else on the computer seemed to be running normally.

I took the computer into my local Apple Store for diagnostics. The genius I was paired with ran it in various modes, none of which worked to solve the issue. We even plugged in an external mouse, which also strangely did not register that mouse's clicks either. Something was faulty with the hardware. The genius said the only viable solution at that point would be to replace the trackpad. But because Apple is Apple, they manufacture products that when one piece is damaged, entire portions must also be replaced because they're all "connected" to "increase performance," the entire topcase, which includes trackpad, keyboard and battery also had to be replaced at a cost of $461.16 when only the click was non-operational. Ouch.

I agreed, as I need the computer daily for work and purchasing an entirely new computer seemed wasteful. They quoted me 3-5 days for a turnaround. After 5 days, I still had not heard back, so I called to get an update. Apple doesn't seem to allow to call the store directly for updates, because I was connected to an over-the-phone specialist. She reviewed the notes and commented that it looked like there was still a wait because an "I/O Flex cable" had been ordered and was awaiting delivery to the store to complete the repair. She said that the Topcase had already been replaced, but the notes stated the computer still was not working. She believed based on the notes the Flex Cable was damaged and what was actually causing the issue.

Based on this information, it appeared the Apple Store technicians misdiagnosed the problem and solution, and that under the circumstances, I would reasonably only be charged for the cost of the cable replacement and repair. I fully expected to be informed of all of this when it was time to pick up the computer after the repairs had been made.

I received a call yesterday that the computer repair was complete and I could come by to pick it up. I checked in and an employee came out with the computer, but he didn't really explain anything and said the charge would be $461.16. I explained to him the update I had over the phone with the tech line and how I was informed the problem to be with a damaged cable. He immediately was aware this issue was beyond him, so he retrieved the on duty Lead Genius. I calmly re-explained the issue and phone call I had. He began to look through the notes on the repair. He seemed to be reading and re-reading the notes, without looking back up. It was at that point that I asked if I could see the notes. The notes did reflect what the call tech person had relayed. They stated that the "Topcase replaced but still failures after diagnostics." Then the direct next note stated, "Damaged I/O Flex Cable. Part ordered to replace". I pointed this out to him. Logically, if it wasn't the Flex Cable as the culprit of the problem, wouldn't the Topcase replacement have fixed the issue? He said curtly, "No." He completely conjectured that perhaps the technician damaged the cable during the repair. He then conjectured maybe it was completely unrelated but the technician wanted to replace it on the house, just to "help you out." But neither scenarios were stated in the notes. The technician did not write, "I damaged flex cable." It only stated "damaged flex cable." I said that because of that, it could only be interpreted how I and the call line technician interpreted it. He said that was just "semantics." I asked if we could talk to the actual repair person listed in the notes. He said, "No."

His conjecture did not seem very convincing to me. It still seemed plausible to me based on the notes that the Flex Cable could have been the issue in the first place, rendering the Topcase replacement completely unnecessary. I kept hammering this point. He then condescendingly tried to explain that if I initially had a damaged I/O Flex Cable, I would have more symptoms wrong with the computer other than just the trackpad - the entire keyboard wouldn't work too. I did not possess the knowledge of Mac technical specs to reply. I basically had to take his word for it.

I just wanted to make sure without a doubt that the Topcase replacement was a necessary part of the repair. Otherwise, the cost is not justified.

My question still remains, however - can a damaged I/O Flex Cable cause just the initial Trackpad click issue?

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In theory yes, but it is pretty uncommon.

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macbook air 13” early 15 keyboard and trackpad not working - apple replaced ipd cable then it works perfectly we only pay about 66sgd more or less.

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Will K estará eternamente agradecido.
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