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MacBook Pro random colored vertical lines on the screen – [Solved]

I am owning a MacBook Pro for a few years from now. Recently I had some anomaly of random colored vertical lines or vertical stripes that shows across my MacBook Pro (2019) 13′ inch randomly at random times.

My painful search for the solution to fix this problem end up in vain after many days of trying. Eventually, I found that the problem is not a software issue and not a complete hardware issue too.

If your issue is similar to the following, you can try this fix.

  1. getting vertical striped lines of varying colors, randomly appear at different locations.
  2. sometimes screen changing to a different tint of color in particular vertical bar sections.
  3. when you press the screen or any keypress on the keyboard makes the vertical lines change or jump.

The provided solution seems to work only after

  1. confirming it is not a hardware issue or screen damage.
  2. confirming all your system updates (OS and other software) are up to date
  3. once you cleared and reset your PRAM to check the problem is not caused by software/parameter issues
  4. confirming there are no hardware damage or software malfunctions

How to reset you PRAM. Do it once to check if the problem is gone after this.

  1. Shut down the computer.
  2. Press the power button.
  3. Immediately after, press Command, Option, P, and R all at the same time on the keyboard.
  4. Hold these keys down until you hear Mac’s startup sound for a second time (the first was after the initial press of the power button).
  5. Release all of the keys.
The Fix

Keep your screen lid closed when your MacBook Pro is not in use.

Yes, surprisingly that’s the fix. I did this, slowly the frequency of lines appearing reduced drastically and now I don’t get this issue after a week of doing this. That’s why I am sharing this in this site. This saves me from spending lots of money to repair my screen thinking that my screen is damaged or there’s an issue with LCD signals, etc.

Just reduce the hinge tension. The hinge is the area connecting your closable LCD screen lid and the bottom unit consists of a keyboard and trackpad. When you open your screen lid, the hinge is designed in a way to keep the screen sturdy when you use the MBP, yet the screen has some weight that pulls it, but the tension in the hinge keeps it in place. Sometimes the connectors in this hinge area get a little less tight due to the pull in the hinges. This is my case, I presume probably this is the case for many of you.

2 probable reasons why this fix works

  • Some display related board (T-CON or something, I don’t know the technicalities) that fixed near the hinge area just above the main logic board is not quite fixed as it should be due to the hinge pressure. When you keep your screen closed, it reduces the hinge pressure and it helps to keep the connection as close as possible. In my case, the longer I keep the screen open (hinge open), the frequency of vertical lines appearing increases. When I say longer, usually it is more than 2 days.
  • As you keep your screen opened, the PRAMs are not getting reset every time you leave your computer. Also keeping the screen open (unlike iMac) the OS is still keeps on running, this creates lot of heat and not allowing it to cool down (if you have multiple continuous running softwares that keeps on awaking and running in the background even if you lock the screen). Usually, the heat accumulates over the top-right corner of your MacBook Pro, i.e. near the ‘delete’ key. In my experience, whenever I feel heat at this area, the random lines appeared immediately.

Few things to consider

You can shutdown your MacBook Pro, but it is not needed if you close the lid often. When you close the lid, after sometime the OS will put the computer to sleep, which you don’t have to bother. This way you can reduce tension in the hinge and keep your MBP cool when not in use.

Keep your MBP dust-free and especially don’t put any cloths, things near the outlet vent area in your MBP. Keeping your MacBook Pro on an uneven or soft places like bed, couch increases the chance of this problem appearing often.

Do not add anything to your screen, that might add weight and increases the hinge tension.

Still have issue, put your question in the comments. Don’t forget to mention if this worked for you.

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