Just been handed a nice Dell e6530 (i7 Ivy Bridge CPU) to diagnose, which powers up, sits around for 30 seconds with the fan blowing quietly, then goes into fault mode flashing the leds to indicate processor fault.
I'd be really surprised if this actually is a faulty processor, but as of right now I don't have one handy to put in to prove it one way or another.
So, I've been checking the obvious, there's no water damage or obvious problems on the motherboard, but one thing is confusing me - all the supplies to the CPU seem correct, except +VCC_GFXCORE which stays at 0V. I can't find anything wrong as yet with the mosfets or surrounding components for this supply, and I'm sitting here wondering if this supply is actually /supposed/ to be present pre-boot. I'm guessing it uses the on-processor GPU at boot time (its nVidia Optimus).
Any one have any ideas? Is VCC_GFXCORE needed to start the CPU completely?
I'd be really surprised if this actually is a faulty processor, but as of right now I don't have one handy to put in to prove it one way or another.
So, I've been checking the obvious, there's no water damage or obvious problems on the motherboard, but one thing is confusing me - all the supplies to the CPU seem correct, except +VCC_GFXCORE which stays at 0V. I can't find anything wrong as yet with the mosfets or surrounding components for this supply, and I'm sitting here wondering if this supply is actually /supposed/ to be present pre-boot. I'm guessing it uses the on-processor GPU at boot time (its nVidia Optimus).
Any one have any ideas? Is VCC_GFXCORE needed to start the CPU completely?
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