1 Reply Latest reply on Oct 18, 2011 10:22 AM by Mukata

    i7 start-up issues

    teho

      I have come across 2 incidents of i7 based motherboards recently from different manufacturers that have sometimes powered up OK but more often than not gone into a 6 second repeat cycle of 'on' for ~650ms then down for ~5.5 secs.    All power rails appear to be stabilized during the initial switch-on period and the 'power OK' is at a solid level for ~500ms.   The 'power switch' signal from the motherboard is then removed and the supply shuts down, with the cycle repeating 5.5 secs later.

       

      I have seen other discussions about this on the internet but no explanation of the cause.   Does anyone have any suggestions?