problem with hp 8470

[marcelofct]

hello friends i have a problem with this laptop and it does nothing i need your help
I have made these measurements:
19v in fuse
3 volts in power button
in u6100 charger (TPS51123RGER) I have:
VIN: 18.35V
EN0: 3.11V
REG5: 4.96V
REG3: 3.25V
ENC: 0.06V

please help me

attach schematic

[mcplslg123]

Re: problem with hp 8470

Check U6104 and Q7350 as you dont have EN_5V_3V(ENC). Btw, U6100 is not charging IC, its your 3V/5V Regulator IC.

[marcelofct]

Re: problem with hp 8470

Check U6104 and Q7350 as you dont have EN_5V_3V(ENC). Btw, U6100 is not charging IC, its your 3V/5V Regulator IC.

I followed what you told me and
U6104 has voltage on pin 1 (3.2v) and on pin 2 I have no voltage, I only have 3.3v on pin 5, I think that on pin 1 is the KBC_PWR_ON signal
the other signal is CPPWR_EN that goes to pin 2 and I do not have it, I followed it and I do not have it in the kbc, thanks for your help I stay tuned

[marcelofct]

Re: problem with hp 8470

someone help me