820-3437 not recognizing SSD

[Neil250]

Liquid damage
Ultrasonic done
Fan spin
Boots to OS X Catalina from USB attached external hard drive

J3700 pins look pristine

Still does not see internal SSD in disk utility
I am going to try another SSD

Checked caps on PCIe data lines: C3710-C3717

Any ideas?

? U3740?

 

[2informaticos]

Post U3740 voltages, with SSD inserted.

 

[Neil250]

U3740

PIN
1: 3.42
2: .99
3: 3.29
4: 0.43
5: 0
6: 3.24
7: 0
8: 0

SSD getting very warm, almost hot

 

[2informaticos]

Correct voltages.
Did you try known good SSD?

 

[Neil250]

New SSD fixed problem.

Thanks!

 

[syslan]

Hello. i have the same problem

the ssd is not recognized. there is no damage or traces of liquid. I already tried with a good ssd and they are the same values.
these are the values of u3740.


pin 1: 3.42V
pin 2: 1.42V
pin 3: 2.25V
pin 4: 3.42V
pin 6: 2.16V
pin 7: 0.01V
pin 8: 0V

already check the values in Ohm of R3740, R3741, R3742 and they are ok.

Any ideas?

 

[2informaticos]

Please open new thread with your problem.
As you've seen, you don't have bad SSD, as in this thread...