How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Ashik Your Own Question

Ashik
Ashik, Mac Technician
Category: Mac
Satisfied Customers: 9921
Experience:  Bachelor of Computer Application (BCA), 9+ Years of Experience in troubleshooting Macs, iPhone, iPad, iPod etc
16433418
Type Your Mac Question Here...
Ashik is online now
A new question is answered every 9 seconds

My iMAC G5 Power PC has an intermittent problem. Occasionally

Resolved Question:

My iMAC G5 Power PC has an intermittent problem. Occasionally the display shows an irregular matrix of dots in rectangular shapes, and often this leads on to break-up of windows and a request to power down. Some days this happens several times and some days not at all.

Techtools suite does not find a problem. However when testing the video display with a pure yellow fill I can seen horizontal black lines flashing by when I click the mouse.
Any advice will be appreciated
Submitted: 7 years ago.
Category: Mac
Expert:  Ashik replied 7 years ago.
Hi I am Ashik. I think i can help you
------------------------------------------------------------------------------------------------------
I saw this problem on many Mac's (Mostly G5s) and it will result in either the replace of either logic board or graphic card repair. So to make sure this is not a hardware issue, you can create a new user account. So goto System Preferences and open Accounts. Create a new Administrator account and restart your Mac. now login with the new account and if the problem still exists, then it might me the hardware issue.

There is a another chance that, the problem is related to not only Graphics card but also to Logic board. Replacement of both Graphics Card or Logic board is very costly.

So my recommendation is, take it to the Apple store directly and ask them to repair it or replace. It is better to take it to the Authorized apple store and not to local computer shops. Since, this is a hardware issue only Apple can help you.

Apple Retail Store

Apple Authorized Service Provider


If you have any more questions, please feel free to reply back to this post. Good Luck !

Best Regards,
Ashik

--------------------------------------------------------------------------------------------------------
...If you are happy with my answer, please kindly click ACCEPT. If not, reply back before Accepting. Bonus and Positive Feedback are greatly appreciated. Thanks
Ashik and 2 other Mac Specialists are ready to help you