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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Desktops > G5 iMac Help me change the refresh rate?

G5 iMac Help me change the refresh rate?
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Fresh-Faced Recruit
Join Date: Oct 2007
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Oct 18, 2007, 12:35 PM
 
Hi there! I recently bought a 24 inch iMac a couple weeks ago.

No complaints about it except one thing! The screen feels like it is very minorly flickering if I stare at it. Is this normal? I can't find a place to mess with the "refresh rate" of the screen, because when his happened on PCs you could always just modify the refresh rate to fix it.

Any suggestions? Does this happen for other people? It's a minorly noticeable flicker, but if I ignore it for the most part, I get used to it. Is this a precursor to a bad monitor that I should probably complain about and get replaced?
     
Clinically Insane
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Oct 18, 2007, 12:45 PM
 
Not normal. If you open the Displays system preferences pane what refresh rate is selected? I've never been able to detect the refresh of a properly running LCD. If you can't finding a setting to increase the refresh I'd investigate replacement (or if that fails repair) options.

"The natural progress of things is for liberty to yield and government to gain ground." TJ
     
Clinically Insane
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Oct 18, 2007, 02:00 PM
 
LCD refresh rates shouldn't cause flickering.
Chuck
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"Instead of either 'multi-talented' or 'multitalented' use 'bisexual'."
     
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Oct 18, 2007, 02:19 PM
 
More likely to be the inverter or the backlight.
MacBook 2.0GHz CD; MacBook Pro 15" 2.4GHz Late '08; PowerMac G4 MDD Dual 1GHz; 3x Xserve G4 1GHz; Mac Mini 2GHz; Big pile of broken and working bits;
     
Fresh-Faced Recruit
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Oct 18, 2007, 03:44 PM
 
Yeah it won't let me modify the refresh rate. It's not clickable, it's grayed out.

It's not a huge issue and I have AppleCare, do you think I should wait 6 months or so and then if it gets worse, take it in?

I feel like this is how "all imacs are" and my eyes just happen to be good at detecting the refresh rate or something.

What do you all think?
     
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Oct 18, 2007, 07:21 PM
 
Originally Posted by prominence View Post
Yeah it won't let me modify the refresh rate. It's not clickable, it's grayed out.

It's not a huge issue and I have AppleCare, do you think I should wait 6 months or so and then if it gets worse, take it in?

I feel like this is how "all imacs are" and my eyes just happen to be good at detecting the refresh rate or something.

What do you all think?
Not normal. LCDs do not flicker, even if their refresh rate was 1.0Hz (once per second). Something is wrong with your machine - either the backlight, power supply or something else. Anything odd plugged in to the same outlet as the iMac? Fluorescent light perhaps?
     
   
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