I have a white intel imac that i got in 2007. I haven't run the hardware test in a long time and decided to see if anything was wrong. for the first time it got an error. it happened during the testing on the main logic board. it gave me this code - 4SNS/1/40000001 VDOR I thought my computer was running fine. so far I've only tried resetting the smc and the error showed up again. from what i read i only know that is a sensor error. I don't know if this is just something i can ignore or is it a sign that worse things are yet to come. i want to get a new imac but not quite ready yet. i'd like to wait until the new ones come out.