My iMac 27'' 5k has got now 2 years and 2 months. I've always keeped it on acting as a server, and of course, the display was set to go in standby after 10 minutes of no use by me. Last week i noticed the backlight not going more over 50% and before i was having got also right speaker issue (crackling sound and distortions at higher volume) and bluetooth sometime loosing connection with both keyboard and magic trackpad, so i went to Apple store at 200km's far from my house and left it the iMac, specifying everything under the Applecare warranty. After 5 working days i called the Apple Store and they said me that they cannot reproduce the defects. I'm really sad and unhappy, i think i will claim it in judicial ways. I will never buy an Apple Computer anymore, i have paid 3400€ for a really hard to repair iMac and they are not recognizing even the warranty.