HP X360 convertible battery blown fuse error, not charging

[drscoot]

HP Modelnumber: 14-dh0061nb
This laptop had a shorted cap on a Vcore section. After replacement is works again. But there is still a battery issue.
The battery is HT03XL and with the built-in component test from HP, in the Power section, I get an error: Logic State: Calibration required (20), Charge state: Blown Fuse (42)
I have another same battery, also with error: Logic State: Very Weak (70), Charge state: Blown Fuse (42)
And a third battery TF03XL (looks identical) with error: Logic State: OK (0), Charge state: Blown Fuse (42)
All these 3 batteries are charging normally in an other laptop. So I don't believe the 3 blown fuses. In fact the laptop runs OK from the battery, until it is empty.

So when I plug in a charger, I get an orange led, in Windows I see the battery symbol that power is connected (flash symbol), but the battery isn't charging! But the laptop is working OK. When I measure voltage at the battery conntecor +/- I see 11.50V and no change with or without charger attached. I use an HP charger capable of outputting 19/6A, tried others also.

Now here is my unexplained find:
when I attach my benchpowersupply set to 19.5V 2A to this laptop it takes all the power it can get; the full 2A, in such way that the voltage drops to 14V. If I set the current limit on the benchpowersupply even higher to 3A, it takes 3A! I don't get any powerled, not white not orange.
Of course the first 2 mosfets getting >65°C then. But it looks the battery is charging, When I measure the batteryvoltage again I see12.50V, when I disconnect the charger it drops again to 11.50V or even 11.60 when I let it charging at 2A for 5min.

When I use then benchpowersupply on another similar laptop with these same 3 batteries I do get orange led and a more normal loading current 19V 1.5A

For my benchpower supply I use an HP bluetip charge cable that I recuped form a broken charger. If I recall right, there are 3 leads, black white and blue in this cable. White or blue is sort of signal wire, I think I have this connected with a resistor to + ( a tip I found earlier somewhere).
Maybe this is the reason why I get a charge with the benchpowersupply and not with the HP 6A charger?

But what is the issue then with this logic board? Is there another component failed due to the badcap at the Vcore circuit?

[motanya]

Check the resistance between the two ends of the 1st two mosfet, normally near the charging port connector. Any of them with low resistance needs to be replaced

[motanya]

Check the resistance between the two ends of the 1st two mosfet, normally near the charging port connector. Any of them with low resistance needs to be replaced

[mcplslg123]

Compare AD_ID voltage with
01.Original adapter
02.DC power supply

[drscoot]

[QUOTE=mcplslg123;n3163542]Compare AD_ID voltage with
what do you mean with AD_ID voltage? Where can I measure this?

[drscoot]

So a little update here. motanya was right! The very first mosfet (SM4378 N-channel) only measured 2 ohms. I think it got damaged when there was a shorted cap, pulling much amps and overheating this mosfet. I replaced it with AON 6426 and now it is charging OK.
I still have that battery fuse error when using the Diagnostic Power test, but that is related to the recup HP charge cable that I use on the bench supply. With the orginal HP adapter no fuse error! Also this HP test cable is only charging when the laptop is OFF.

I wondering if there is way to use such recup HP test cable (recovered from a broken charger) on bench power supply, that fully works like an HP adapter?

Thanks to Motanya for the tip!

[mcplslg123]

AD_ID can be measured on the dc jack itself(usually brown wire). If you want to use a hp adapter cable with dc supply,then centre pin must be connected. Only red/black goes to dc supply. So connect a 330K resistor between centre pin(AD_ID) wire and +19V wire(red). that will create AD_ID voltage for 65W adapter and motherboard will ceognise dc supply as 65W hp adapter. The solution is already posted in this forum.

PS: Always make it a habit to check first dc-in mosfet for short when ever main rail is shorted. 90% of the cases,it'll result in a shorted 1st dc-in mosfet.