HP 650 plugged in not charging

[invisible4u4ever]

Hi,

I have one hp 650 with notification plugged in not charging, I check plus on battery connector when battery is plugged in and have 12v on + ... when laptop is off and put 12v from power supply I have 12v and 1.8A power comsuption but when charger is plugged in on power supply I have only 0.1A ...

Does anybody have idea what to check

[ktmmotocross]

Re: HP 650 plugged in not charging

offcourse first two mosfets and charging ic

[invisible4u4ever]

Re: HP 650 plugged in not charging

Something strange is happening when i put dc power supply on output of second mosfet... amps compsumtion goes to 2.1A and go to zero and again to 2.1A ...

I didn't check charging ic

[invisible4u4ever]

Re: HP 650 plugged in not charging

but why i have 12v on + of battery connector and battery not charging ... that is strange to me...

[on/off]

Re: HP 650 plugged in not charging

There could be mosfet shorted on area charging circuit. especially High side mosfet. (Drain-to-Source)

Also would be help if you mention mainboard ID. So, we have same a reference

[invisible4u4ever]

Re: HP 650 plugged in not charging

This is schematic

[invisible4u4ever]

Re: HP 650 plugged in not charging

Changed charging circuit and everything is working fine.
Thanks everyone

[invisible4u4ever]

Re: HP 650 plugged in not charging

hahah after 15min again same problem... charging and after one sec not charging... loop I dont know where and what to check

[on/off]

Re: HP 650 plugged in not charging

Make sure use original hp adapter and have known good battery. Try replace Q0901 and Q0902.

[invisible4u4ever]

Re: HP 650 plugged in not charging

aaaa check this... when I was heating first fet .... i try again and after that charging is off no going on... i check capacitor on gate of first fet and that capacitor is short to ground after that I replace that capacitor and check again charging is fine for now...

[ktmmotocross]

Re: HP 650 plugged in not charging

"when i put dc power supply on output of second mosfet"

u diid not read forum?

why do u thing this is two mosfets to turn on power?