820-00165 liquid damage does not see SSD,

[Repairable]

820-00165 liquid damage (near SMC) does not see SSD, SSD is checked in differnt mac and works perfect.+


SSD_RESET_L 3.278v
SSD_PWR_EN 0.451v
P3V3SSD_VMON 0.029v should be 0.7v
r3740
r3741
r3742

after replacing r37/40/41/42 i got P3V3SSD_VMON 0.998v

 

[Repairable]

SSD_PWR_EN at start (boot) it is 3.248 volt, then goes down to 0,451v

 

[dukefawks]

If there was corrosion on R3740/41/42 it make sense that there is something up with U3740 pulling down SSD_PWR_EN.

 

[Repairable]

oke, there was no corrosion on those resistors, just replaced them to make sure.

there is no resistor on R1620 it also did not look like there was ever one there....???

i made a wire on R1620 pads and it works 100% perfect atm, after the boot i turned it off again and wil place a resistor on the R1620 pads

but if i do that wil i take a risk of killing the machine ?

 

[aprendiz]

R1620 is a pull up resistor wich make SSD enable on S0 state, R1696 is a pull up resistor wich makes SSD enable on S3 state, so, R1696 makes SSD enable faster than R1620...

First check if R1696 and traces are ok, also you should use a 100K resistor not a wire....

 

[Repairable]

Yes like i stated wire was test iT booted now replaced with r1620 100k from donor
r1696 is good tracés also
thabks for the info about faster defect