Pixelated iMac screen problems! Help!

[ib9]

Hi guys, basically a big problem. My screen on my iMac has become very pixelated and i have no clue what or how it has happened.

Really making it difficult to navigate and also sometimes clicking is a problem.

Could it be a hardware or software issue?

Below is a picture of what comes up:

 

[FreakinEurekan]

I'm guessing hardware. What model iMac? Anything changed recently (hardware or software)?

 

[ib9]

I'm guessing hardware. What model iMac? Anything changed recently (hardware or software)?

Its an iMac 8.1, and no significant changes that I am aware of.

 

[FreakinEurekan]

Its an iMac 8.1, and no significant changes that I am aware of.

That makes it an early 2008 model. I'd say most likely failure is the GPU - depending on which version of the 2008 iMac, might be an ATI HD2400 or 2600, or an NVidia GeForce 8800. Those cards are socketed so they can be replaced without a full logic board replacement.

If you have a service center or Apple Retail Store nearby I'd take it in to be checked out. DIY replacement is possible but hard to confirm that's the problem so you might spend money on a card & not end up needing it.

 

[ib9]

That makes it an early 2008 model. I'd say most likely failure is the GPU - depending on which version of the 2008 iMac, might be an ATI HD2400 or 2600, or an NVidia GeForce 8800. Those cards are socketed so they can be replaced without a full logic board replacement.

If you have a service center or Apple Retail Store nearby I'd take it in to be checked out. DIY replacement is possible but hard to confirm that's the problem so you might spend money on a card & not end up needing it.

Thanks a lot for your help, I will get that checked out asap and come back to here and let anyone know in case they're facing the similar problem.