MacBook Pro 13 (Mid 2014) - Erratic Keyboard and Trackpad

Hi,

I am having a strange problem with my MacBook Pro (Retina 13in - mid 2014)

Specs:

https://everymac.com/systems/apple/macbo...

OS 10.13.4

All of a sudden the keyboard and trackpad have started to work erratically.

Keyboard works really slowly, I have to type each character multiple times and sometime it just spurts the same key multiple times.

The backlight of the keyboard is also fine.

For example:

• press : ee -> e
• press : s -> sssssss
• press : tttttttttt -> t

Trackpad is also almost unresponsive.

I have already tried doing a NVRAM and SMC reset but no change. However, an external USB mouse and keyboard works fine.

I have already upgraded the OS to HighSierra but it didn’t work.

It is a dual boot system so when I boot under Windows 10, it tells me:

Unknown USB device (Set Address Failed) under USB controllers with error code 43 in the error description.

I have already tried uninstalling the drivers under Windows 10 or upgrading bootcamp drivers but of no use.

There has been no water damage and the computer has been used with sufficient care.

I do not think it is a battery swelling issue either since the laptop is holding charge.

Do you think the following guide applies to me?

Really strange trackpad and keyboard problem. MacBook Pro Early 2015

Is the assembly of Mid2014 version the same?

Thanks

Omer

Update

I just ran the diagnostic (CMD + D) and got the following error:

"There may be an issue with the display

Referrence Code: VFD002"

https://support.apple.com/en-us/HT202731

However, there is nothing wrong with display.

Update @danj

There was no water spill as such. I did spray a cleaner to wipe my screen some but I do not remember that any moisture went under the keyboard.

The battery seems to be holding power and in good standing. Please see the CoconutBattery results attached.

Update 19th May 2018 @danj

There is no visual deformity on either side therefore I am not so sure if "battery swelling" could be the issue.

I have come across a few forum threads on the Internet where people have put their laptop in plastic bag and have cooled it in the fridge for a few hours just to exclude the battery swelling as the root cause.

Do you think it is a good idea? Would condensation not damage it?

Could it be the problem with logic board? Then why does it work after multiple key presses? Or it is more like a driver / input buffer issue?

Here are two videos to give you an idea what I mean:

All the keys are working but sometimes need to be pressed multiple times.

Trackpad response after multiple swipes.

I have also tried booting into Ubuntu via USB stick, hoping the standard USB drivers might solve the problem but it did not help. Had the same problem under Ubuntu as well.

Update 20th May 2018 @danj

Thanks again Dan for your help!!

Here is a screenshot from TG Pro

after 15 mins

In both cases, no change in keyboard or track pad behavior.

Update 22nd July 2018 @danj @mayer

In the meantime, the issue the keyboard has 90% resolved i.e., it does skip a character but not as bad as it were in the beginning.

However, the track pad has now gone completely dead. It used to move after a few swipes.

I asked Apple support to have a look at the laptop and they are recommending

a top case replacement since they think it has got something to do with the top case.

Most likely it is the bus which connects laptop and track pad. They were not specific if it goes through USB controller or via their own standard.

They have also confirmed that battery is also fine, logic board is fine and there has been no water damage.

Do you think a top case replacement is necessary or we can also repair/replace this bus.?

Update 9th Aug 2018 @danj @mayer

I’ve had it professionally checked and the shop tells me that the “Trackpad controller on logic board” is defective. The solution is to change logic board, trackpad and the battery.

As such the battery is fine but it will be removed to do the repairs anyway so it is better to have it changed.

Do you think I need to change all these parts of the repair job could be simpler?