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I tried using 1V and it shows a short consuming 1.3A however went to all the components on the board and didnt find anything heating
I am using thinner instead of alcohol since it's more cost benefit down here in Brazil. Could it be the problem? Sorry that I dont have a thermal cam.
Should I...
I touhght you mention
Short resistance is low enough to start with 1V, that is, go higher at first. Am I getting you wrong?
Now you tell me to start with 1V?
Ok will start with 1V
Can I start with 3V? 2A is what my PSU also has. Is this enough? I do not feel safe to go over line voltage limit. I think I will keep it to 3V if you agree.
Sure I will follow boardview and use thinner to be honest with you! I use thinner more than alcohol
Will just put a new U8200 after...
Sure
Still have some questions. I should replace U8200 after solving the short on 3V3_G3S right? or it doesnt matter?
I do not have thermal camera, how to properly find this short? Injecting volts and putting some alcohol on the componentes that interconnected to 3V3_G3S? Have a better way...
I was going to replace U8200.
Removed it
But still have a short on PP3V3_G3S = 0.002V
Knowing that we still have a short on PP3V3_G3S... could U8200 be good and the problem be around these line?
How to move forward from that?
PP3V3_G3H_RTC = 0.002 = WEIRD
PP3V3_G3S = 0.002 = WEIRD
PP1V8_SLPS2R = 0.180 = A BIT LOW
PP3V3_S4SW_SNS = 0.525 = OK
PP5V_S4SW = OL = OK
Those are the measurements.
Let me know if you need anything else more from the Power FET page
Do I need battery connected to check if C7050 is stable since it's PPVBAT line?
I am working with the bare board on the bench by the way and the USB-C connector to power the board.
I do have a MBP A2289 (820-01987) which is not turning ON has around 5.15v on the USB-C connectorI
tried DFU to see if have any behavior on Apple Configurator. Nothing happened
PPBUS_G3H = 12.23 and drops to 8 in a constant loop
3V3_G3H_RTC = Goes to 1.7v and drops in a constant loop
I do have a scrap board of 3787
Since its seems to be the same model and year however for MBP 15 inch.
I think it could work.
If so can I use it since it's the only closest SMC that I do have?
Hello
I am creating the USB stick right now.
However there is no 3462 file for the SMC
Also if you go to the SMCTool website
There is this warning.
Not sure If I can find it anywhere else
Since I do not have a exact same model donor board.
I am thinking to go with this SMCTool.
I think I able to create the USB stick with the tool
But since its a board with a NAND. I will not be able to remove the HD/SSD from it. Is there an issue doing it that way?
How about specific flash...
Replaced the SMC with another one with the same schematic description from a board 820-00165
Now the machine is turning on.. I do have greenlight
HOWEVER its really SLUGGISH
and If I try to turn on only using the battery without the magsafe connected it goes to login and starts loading the...