This message was posted on behalf of Intel Corporation
I understand that you are experiencing an issue where the system turns off 6 or 7 minutes after being turned on.
Regarding this I would like to start by mentioning that the unit you currently posses is out of interactive support, this means that this unit is no longer supported by us. However, since I want to help I would recommend you to try with a different processor on the current motherboard. This is just to test and see if the problem is the processor itself or something else, That will help you isolate the problem as well.