Imac 27inch screen problem


cwhong13

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Hi everyone,

My imac 27inch late 2013 screen is showing as the attached pictures started yesterday. Only vertical green lines and backlight is on. Computer seem functions as normal. Only no display at all. Is it screen or graphic card problem?
 

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Cory Cooper

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Hello and welcome.

Normally, that is a sign of a failing video card. You can test it if you have an external monitor available to connect. If the issue is replicated on an external, then it is usually a video card issue. If the external displays normally, then it is an issue with the LCD panel and/or cable.

-Is the iMac covered by AppleCare?

C
 

devon

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hi
am afraid not
Peter

P.S.
how do i connect the two monitor
 

Cory Cooper

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You'll need an adapter - will depend on what type of connection the external monitor has.

C
 
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devon

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hi
MacOS Sierra, (27-Inch iMac 2007 )
Mac Screen Problem Flickering, Weird Colors, Glitches & Bars/Lines .

But now my iMac stuck on the loading screen
can i get my file out some how

help please
Peter
 

Cory Cooper

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Hello again,

You may be able to use an external display as previously mentioned. If the issue is only the LCD panel of the iMac, then you will get video on an external display. If it is the graphics card, then the issue will persist on the external display.

You could also try holding the Shift key down during startup. That will startup the iMac in Safe Mode, which will eliminate any software issues that could be causing it to hang at the Apple logo.

See if those options work and let us know.

C
 
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