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820-4668 No POWER - PP5V_S0 missing
- Thread starter mushr00m
- Start date
12V_S0 tries to appear, no pulse at least?
Get a better lab PSU.
It should start with its original power supply.
If not, change it.
It should start with its original power supply.
If not, change it.
12V/5A lab PSU supply can help you to discard possible power supply issue.
You are the only one who can confirm that.
But you need a proper lab PSU, or other known good original power supply.
Proper tools are needed to discard problems like this.
If you set your actual lab PSU to 3A, should be sufficient, but I'm not sure; no idea about a current profile on this board.
But you need a proper lab PSU, or other known good original power supply.
Proper tools are needed to discard problems like this.
If you set your actual lab PSU to 3A, should be sufficient, but I'm not sure; no idea about a current profile on this board.
Indeed
But with the tools that I have now and the behavior that happens. Sometimes it turns on and works and other it doesn´t (So I assume when working everything is working I mean all voltages / power rails).
I do think it could be a tiny component like a resistor not working properly and it all that we´ve got. But
Do you think it could be a PSU issue? If so I am going to be a brand new PSU for this iMac. but really hope to solve this problem
But with the tools that I have now and the behavior that happens. Sometimes it turns on and works and other it doesn´t (So I assume when working everything is working I mean all voltages / power rails).
I do think it could be a tiny component like a resistor not working properly and it all that we´ve got. But
Do you think it could be a PSU issue? If so I am going to be a brand new PSU for this iMac. but really hope to solve this problem
Why don't you get first a 24V/20A lab PSU first?
Some links posted on the forum.
As seen you need one for testing iMacs.
Very usefull also to find shorts on any other logic board.
Some links posted on the forum.
As seen you need one for testing iMacs.
Very usefull also to find shorts on any other logic board.
"Some links posted on the forum."
I don't understand why people prefer to wait hours, instead of searching on the forum/Internet.
Better price on Alixpress for sure.
I don't understand why people prefer to wait hours, instead of searching on the forum/Internet.
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Better price on Alixpress for sure.