Hello! I have an iMac which i replaced originally RAM (1GB) with 2 x 2 Gb Corsair Kit. A few days ago i noticed that my computer boots very slow (at least 1:30 minutes from the moment i press the power button until i can start using it). So i tried to start Apple Hardware Test from the OS, of course without success; then i used the dvd disc 1 and after a few seconds after the AHT started i got an error “Alert! Apple Hardware Test has detected an error. 4MEM/4/40000000: 89c3dca8” So i would like to know: 1.What is the problem? 2.What can i do to solve the problem I would like to say that the system is freshly installed, the HDD was entirely formatted. Also i took off the RAM plates i cleaned it and i blow the slots so that the dust will dissipate. Thanks a lot!