HP 650 G1 - works only with battery+charger but not detecting battery

[ktmmotocross]

Hello.
Have this HP 650 G1 that works ONLY when battery first and then attach charger. otherwise it not work with charger or battery only.

i cannot fing what is wrong with it. ACDET - ok, ADP_A_ID - 3.3V ACPRESS, Mosfets looks ok. even when working board dont see battery . data link on battery is ok 3.3V

this charging circuit is hard. anybody knows what to measure?

HP 650 G1
6050A2566401-MB-A04
sn - 5CG52238HF

[Sephir0th]

Could be a faulty diode at charging controller VCC pin. Check what voltage appears there with all three conditions (charger only, battery only, battery + charger)

[mcplslg123]

Its wiser to share more details like which charging IC is used,measurements of charging IC for voltage.Are you powering it with dc supply or original adapter? Some elitebook/probook simply dont like the dc supply. If you are using dc supply,is 19V crossing the 1st dc -in fet?

[ktmmotocross]

https://www.badcaps.net/forum/troubl...probook-650-g1

charging ic is BQ24736RGR
it have vcc , acdet, I have 3.3 and 5V, 19V ALW
try chargind with several adapters and PSU
mosfets on charging and powering looks ok

[mcplslg123]

Try replacing the BTST capacitor and resistor even if it measures correctly.