Hello everyone!
I have the Acer Travelmate P256 laptop with LA-B162P motherboard which does not respond to the power button and does not turn on any LED.
I have checked the coils with respect to ground and everything seems normal.
5VALW are present but in 3VALW I have a slightly low value 2.36V
I have made the following measurements on PU401
EN1 (1) ... 3,11V
PG (2) ... 0V
EN2 (3) ... 0,44V
OUT (4) ... 2,36V
LDO (5) ... 3,11V
BS (6) ... 2,55V
IN (7) ... 4,57V
IN (8) ... 19,90V
LX (10) ... 2,35V
I have opened PJ401 and the values are practically the same except for pin 4 and 10 where the value is 2.80V
With these measurements can I say that PU401 is defective?
I have the Acer Travelmate P256 laptop with LA-B162P motherboard which does not respond to the power button and does not turn on any LED.
I have checked the coils with respect to ground and everything seems normal.
5VALW are present but in 3VALW I have a slightly low value 2.36V
I have made the following measurements on PU401
EN1 (1) ... 3,11V
PG (2) ... 0V
EN2 (3) ... 0,44V
OUT (4) ... 2,36V
LDO (5) ... 3,11V
BS (6) ... 2,55V
IN (7) ... 4,57V
IN (8) ... 19,90V
LX (10) ... 2,35V
I have opened PJ401 and the values are practically the same except for pin 4 and 10 where the value is 2.80V
With these measurements can I say that PU401 is defective?