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David, Mac Support Specialist
Category: Mac
Satisfied Customers: 1365
Experience:  BSc H.Dip Apple Certified Professional
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I have MacPro. 2008 model. Some time ago computer didn't

Customer Question

Hi. I have MacPro. 2008 model. Some time ago computer didn't boot up. It had problem with video chip. I dismantle the computer, and started heating process with video chip, to see, if it helps instead of replacing video chip. I work in computer service center, we are repairing computers. it helped, so everything worked fine, until i installed software update, and restarted computer. Now on screen has tiny blue line appeared.
JA: How much experience do you have with this particular machine?
Customer: I have it only one year. i don't know lot about macs so far. I usually work with windows computers
JA: What troubleshooting have you tried?
Customer: right now nothing
JA: The Mac expert can solve this for you. Anything else you want him to know before I connect you two?
Customer: ok, it will be great
Submitted: 2 months ago.
Category: Mac
Expert:  David replied 2 months ago.

Hi my name is ***** ***** welcome to Just Answer. I am reviewing your question and will reply ASAP.

Expert:  David replied 2 months ago.

It is a video related issue you describe. The screen with a blue line through it.

Have you been able to try some things like:
1. A different computer monitor/display.

2. A different display cable.

3. Different display port on the Mac Pro.

Let me know these 3 things, and anything else you might have already tried. Then I can best advise on the following steps.

Thank you,


Expert:  David replied 2 months ago.

I just need to know a bit more before I can give you troubleshooting steps.

Expert:  David replied 2 months ago.

It sounds like the graphics card needs to be replaced, but first try these troubleshooting steps:

  1. Shut down the Mac.
  2. Unplug the power cord.
  3. Wait 15 seconds.
  4. Plug the power cord back in.
  5. Wait 5 seconds, then press the power button to turn on the Mac.


  1. Shut down your Mac.
  2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R.
  3. Turn on your Mac.
  4. Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
  5. Hold these keys until the computer restarts and you hear the startup sound for a second time.
  6. Release the keys.

Let me know when you have done both things, get back to me with the results please.

Expert:  David replied 2 months ago.

Please rate my help with the star rating system. If you need more help you can reply here.

Thank you!