HI all. I have here 2 identical asus laptops ,TP412UA, that are dead(probable cause , one of the ac adapters is bad). No power up on ac adapter or battery, no sign on life when adapter is pluged in, no response from power button, nothing.
Taking as reference the measurements from this post
https://www.badcaps.net/forum/troubl...g-on#post82907
I don't have any short on any coil, but, without battery, when I give 19v on dc jack, the consumption is 10mA and I'm missing 5v(coil 4) and 1v(coil 6) , according to measurements from that post.
AFAIK there is no schematic for this board....
I have tried to write a bios dump, found on this forum, a good one, but no change....The two missing voltages remains the same.
The ALTJ chip, for 5v, has 0v on EN pin....That's the reason it does not start....From my measurements the EN pin command comes from the PGOOD pin of the K6= chip , the one that makes 1v rail.
This K6= chip also has the EN pin on 0v......BUT here I'm lost...I don't know who gives the EN command for the 1v rail...probably the ITE , I don't know
Does anyone have an idea ? Where to go further ?...What can I try?
Thanks
Taking as reference the measurements from this post
https://www.badcaps.net/forum/troubl...g-on#post82907
I don't have any short on any coil, but, without battery, when I give 19v on dc jack, the consumption is 10mA and I'm missing 5v(coil 4) and 1v(coil 6) , according to measurements from that post.
AFAIK there is no schematic for this board....
I have tried to write a bios dump, found on this forum, a good one, but no change....The two missing voltages remains the same.
The ALTJ chip, for 5v, has 0v on EN pin....That's the reason it does not start....From my measurements the EN pin command comes from the PGOOD pin of the K6= chip , the one that makes 1v rail.
This K6= chip also has the EN pin on 0v......BUT here I'm lost...I don't know who gives the EN command for the 1v rail...probably the ITE , I don't know
Does anyone have an idea ? Where to go further ?...What can I try?
Thanks