Asus X540up no power and won't on

[clmorre]

19v rail is present.
3v and 5v LDO is present
3v and 5v in coils are present
powergood signal from main reg is present to SIO
However no power light and charging light.
3v is also present in power button but would not turn on.

[rudelito]

Re: Asus X540up no power and won't on

change charging ic faulty

[ktmmotocross]

Re: Asus X540up no power and won't on

change charging ic faulty

do u have some proof for it?

i done it and nothing changed

[ktmmotocross]

Re: Asus X540up no power and won't on

in my case it was cracked balls under cpu. after reflow all work

[mon2]

Re: Asus X540up no power and won't on

Suggest the way to attack this case is to start with the charger IC.

The charger IC is @ PU8001. See attached.

PU8001 = ONSEMI NCP81216AMNTXG

Then locate the datasheet for this component or reference schematic to compare the values on each pin of this part. So far, unable to locate a datasheet on the internet.

[ktmmotocross]

Re: Asus X540up no power and won't on

Suggest the way to attack this case is to start with the charger IC.

The charger IC is @ PU8001. See attached.

PU8001 = ONSEMI NCP81216AMNTXG

Then locate the datasheet for this component or reference schematic to compare the values on each pin of this part. So far, unable to locate a datasheet on the internet.

do u realize that NCP81216AMNTXG is NOT charger ic? and so why can be charger ic bad when u have all stby voltages, so its function is mostly ok?