#1 HP 15-bs144wm (LA-E802P) 3v / 5v appears and immediately goes off..
da siddiq • 21 maggio 2020, 16:54
Hello everyone, when charger is connected, 3v / 5v appears and quickly goes off. There are no shorts on the board. The battery charges. Lid Switch is ok. I have programmed both Bios and KBC. When I manually apply 3v to both EN1 and EN2 of PU301 (TPS51225), both 3v and 5v appear and remain steady, which suggests that PU301 is OK. I disconnected PJ303 and PJ302 but still 3v/5v appears and goes off when I connect the charger. 3v appears on power switch and pin14 of KB9022 and is suppressed when power button is pressed. Diagnosing is difficult with the lack of schematic. Any suggestions is welcome. Thank you in advance.
some pins that i have tested on the KBC:
adp_id - 1.11v
ec_kbrst# - 0v
ec_rst# - 3.29v
plt_rst# - 0v
lid_sw# - 3.3v
ec_acin-3.3v
some pins that i have tested on the KBC:
adp_id - 1.11v
ec_kbrst# - 0v
ec_rst# - 3.29v
plt_rst# - 0v
lid_sw# - 3.3v
ec_acin-3.3v