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Versão atual de: Kristen Gismondi (detalhes da votação) ,

Texto:

Have similar problem. I thought it was my i7 cpu, but cpu works perfectly at another machine.
 
I give 12v to motherboard with my bench psu (cooling was off).
 
I found that the led start blinking WHEN i press cpu at the top left (around pin 221). I saw at boardview that this side is for communication with ram. With another cpu i have the same problem. I put a piece of paper to cpu pins to isolate the problem.
 
Even with the ram dimms off, the problem exists. Ram slots seemed perfect. Cpu slot pins seemed perfect.
 
edit: Possible some secondary voltage was short. Found a low resitance (can’t remember how much) at PP3V3_S0 that i didn’t like, i inject 3v to check for hot areas, didn’t found.
 
Then i assemble machine, boot it and works.
 
Tried Apple Service Diagnostics, passed all tests.
 
Hypotheses:
 
It’s magically fixed (temporary or not)
 
It’s something missing (still i didn’t find it)
 
Blow the sd reader slot for dust, i might remove some piece of wire stucked within.
 
I did something without my knowledge that fixed the problem.

Status:

deletedopen
deletedopen

Editado por: Doctor IT ,

Texto:

Have similar problem. I thought it was my i7 cpu, but cpu works perfectly at another machine.
 
I give 12v to motherboard with my bench psu (cooling was off).
 
I found that the led start blinking WHEN i press cpu at the top left (around pin 221). I saw at boardview that this side is for communication with ram. With another cpu i have the same problem. I put a piece of paper to cpu pins to isolate the problem.
 
Even with the ram dimms off, the problem exists. Ram slots seemed perfect. Cpu slot pins seemed perfect.
 
 
 
edit: Possible some secondary voltage was short. Found a low resitance (can’t remember how much) at PP3V3_S0 that i didn’t like, i inject 3v to check for hot areas, didn’t found.
 
Then i assemble machine, boot it and works.
 
Tried Apple Service Diagnostics, passed all tests.
 
 
 
Hypotheses:
 
It’s magically fixed (temporary or not)
 
It’s something missing (still i didn’t find it)
 
Blow the sd reader slot for dust, i might remove some piece of wire stucked within.
 
I did something without my knowledge that fixed the problem.

Status:

opendeleted
opendeleted

Editado por: Doctor IT ,

Texto:

Have similar problem. I thought it was my i7 cpu, but cpu works perfectly at another machine.
 
I give 12v to motherboard with my bench psu (cooling was off).
 
I found that the led start blinking WHEN i press cpu at the top left (around pin 221). I saw at boardview that this side is for communication with ram. With another cpu i have the same problem. I put a piece of paper to cpu pins to isolate the problem.
 
Even with the ram dimms off, the problem exists. Ram slots seemed perfect. Cpu slot pins seemed perfect.
 
 
 
edit: Possible some secondary voltage was short. Found a low resitance (can’t remember how much) at PP3V3_S0 that i didn’t like, i inject 3v to check for hot areas, didn’t found.
 
Then i assemble machine, boot it and works.
 
Tried Apple Service Diagnostics, passed all tests.
 
 
 
Hypotheses:
 
It’s magically fixed (temporary or not)
 
It’s something missing (still i didn’t find it)
 
Blow the sd reader slot for dust, i might remove some piece of wire stucked within.
 
I did something without my knowledge that fixed the problem.

Status:

open

Mensagem original de: Doctor IT ,

Texto:

Have similar problem. I thought it was my i7 cpu, but cpu works perfectly at another machine.

I give 12v to motherboard with my bench psu (cooling was off).

I found that the led start blinking WHEN i press cpu at the top left (around pin 221). I saw at boardview that this side is for communication with ram. With another cpu i have the same problem.  I put a piece of paper  to cpu pins to isolate the problem.

Even with the ram dimms off, the problem exists. Ram slots seemed perfect. Cpu slot pins seemed perfect.

Status:

open