820-2330-A no green or orange light / does not start

Berky

New member
Hi, I have same 2 Boards and no green or orange light, no Fan spin, no Power up to start. 3.425V "G3Hot" Supply exists.
SMC_BC_ACOK= 3,2V
PP18V5_DCIN_CONN = 18,77V
ONEWIRE_EN = 9,27V


I'm am despair, please help!
 

dukefawks

Administrator
If 18V on F7040 then there is something seriously wrong! This is the 12V output of the ISL6258 charger circuit. Shorted Q7030?
 

Berky

New member
On all pins of Q7030 is 18V present.
You're right, I changed Q7030 and have now 12,26V to output of the ISL6258 charger circuit.
But still no green or orange light and does not start!
I've been watching, after 6 hours I have connected the power and the Magsafe led was orange. When I separated the connection and again conjoined the MagSafe no led is to see more.
I tried with smc_ONOFF_L pin to start, but to no avail.
PIN 4 of U6915 Onewire_Overvolt give 0,02V, is this normal?
 
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dukefawks

Administrator
12.3V output means the SMC is not running it should be 12.6. Check SMC_RESET_L and check for corrosion around SMC.
 

Berky

New member
Icheck SMC_Reset_L for corrosion, but nothing.
I changed U5000 and everything is the same. F7040 are now 12,3 v.

come on Guys please help me!!
:(
 
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Berky

New member
I don't no, Did the quick.
I m check pin 1 of u5000 0V, I think U5000 is short because SMC_RESET_L comes out of them.
 
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dukefawks

Administrator
There is nothing to the U5000 circuit. If it gets 3V42 on pin 2 and pin 5 over 2.5V it will enable pin 1. Checked R5000?
 

dukefawks

Administrator
I also asked pin 5 and R5000. Resistance to GND on pin 2 is also important. You need to show some initiative here too!
 

Berky

New member
Sorry for my english, I didn't understand it.
R5000 pin 2 = 5,75 KOhm to GND pin 1 = 5,14 KOhm to GND
 
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