24" iMac issues

[bumzo1]

I have a 24" iMac that just turned a year old yesterday. I do have Apple care and it has been having some problems lately. Firstly I have been noticing some pretty significant burn in issues primarily on the left side. Thats where my ichat normally sits so when on a grey background I can see a burnt in image of my ichat list. There is also a very noticeable line across the top. When I turn down the brightness it also makes an annoying hum that isn't present when at full brightness. Also the speakers will randomly make a high pitched noise which can be resolved by playing some music. and lastly every once in a while my computer will wake up from sleep and the screen will be frozen which requires me to hard shut it down. So what do you think I should do and does it warrant apple care attention?

[Matthew Yohe]

The burn in issue is present on all 24" iMacs. It unfortunately only takes a few hours to burn in and many more to go away.

Don't know about your other issues.

[TMRaven]

It was pretty common for my old G5 20 incher to get burn ins after not so long a use as well. Luckily the screen "fixed" itself over time, and the burn-ins eventually disappear. Hopefully the 24 inch is like that as well!

[flopticalcube]

The "burn-in" you are experiencing is actually image retention. It will eventually go away if you have a more varied screen (like using a screen saver or watching movies). The hum due to brightness sounds like a bad inverter board. Its an easy fix for Apple. THe freezing on wake-up could be a GPU or logic board problem. If your Apple Hardware Test (Press D on boot up with the original install DVD in the DVD drive) doesn't show anything, let Apple take a look at it.

EDIT: Just thought of one other thing to try for the freezing. Reset your PRAM (see sig).