Dell E7440 AC adapter = unknown

[user000110002]

Hi, i have Dell Latitude E7440 LA 9591P Rev 1.0 (A00). Battery wont charge, in bios settings AC adapter is unknown. PSU is 100% okay, have no problem in others laptops. I Checked PQ2 and PQ3, PQ2 is 0.04v, PQ3 is 5v.
PQ2:
1pin: 0.04v
2pin: 5v
out: 0.04v.
I already replace PQ2, but it wont help. Do you have any idea?

 

[user000110002]

when i take off PU111 voltage of PQ2 is 3.3v. When i plug new one, voltage back to 0.04v...

 

[user000110002]

PR8 voltage is:
left-0.04v
right-3.3v
PR9 voltage is:
left and right 0.04v.
I already replace both of them, not help

 

[Admin]

PR8 voltage is:
left-0.04v
right-3.3v
PR9 voltage is:
left and right 0.04v.
I already replace both of them, not help

Ac adapter unknown that mean the ID is not giving the right signal.

 

[user000110002]

ye i know, but psu is good, working excellent in others laptops

 

[Admin]

PR8 voltage is:
left-0.04v
right-3.3v
PR9 voltage is:
left and right 0.04v.
I already replace both of them, not help

Can you change the PD5

 

[Admin]

Can you change the PD5

Maybe this diode is broken.

 

[user000110002]

nope, still unknown, PQ2 out i 0.04v

 

[user000110002]

laptop have good voltage only when i desold and take out U111 element

 

[Admin]

laptop have good voltage only when i desold and take out U111 element

Have you try to change U111

 

[user000110002]

yes, i find problem, charger chip was burned.

 

[Admin]

yes, i find problem, charger chip was burned.

Well done.