i have an alienware area 51m r1 that was working but had a bad keybaord. And now after removing the guts to replace the keyboard, it doesn't power up. the cpu is a removable kind so i checked +vcc_core with and without the cpu to make sure that nothing on the rail was shorted other than the cpu. it measures 0.6 ohms resistance to ground. Is this normal?
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
Is that the resistance to ground WITH the CPU installed ?
What is the resistance to ground WITHOUT the CPU installed on this power rail ? -
Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
the resistance to ground without the cpu is OL.Comment
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
I believe it is RIP time for this CPU but wait on others to comment.
We have an A1398 which came in with liquid damage and after a few power cycles, now playing dead. The CPU vcore resistance is 1 ohms to ground so fairly sure it is in the same boat as yours.Comment
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
0.6 Ohms is very likely normal on this board with cpu installed.Comment
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
but that's basically groundComment
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
Will just add that yesterday, thought macbook a1398 (820-3332) was with a shorted cpu with .9 to 1 ohms to ground vcore resistance.
@mferna14 noted that this logic board demands a battery to boot normally - not just the ac adapter.
That was it..board is booting fine once we attached the battery.
So perhaps there is still hope for your CPU.Comment
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
you're right. i replaced it today and it still the sameComment
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
how to tell if the platform controller hub (PCH) is shorted?Comment
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Re: alienware area 51m r1 I7-9700 +vcc_core .6 ohms
You can measure datalines on usb2 port to ground the must be in the kohms, that can give you a clue.Comment
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