Thanks, I will check the ACIN divider as you suggested. But I still don’t understand how an ACIN issue could explain the 10 V on ASGATE and the heating on the 2 kΩ gate-resistor (similar laptop have this value= 24v !!! ) and is normal that the gate of the mosfet = 19.77v!...

Thanks, I will check the ACIN divider as you suggested. But I still don’t understand how an ACIN issue could explain the 10 V on ASGATE and the heating on the 2 kΩ gate-resistor (similar laptop have this value= 24v !!! ) and is normal that the gate of the mosfet = 19.77v!...

I already tested with another original charger, same wattage. ACIN = 2.08V on my board and 2.10V on a working Victus, so it’s very close to the reference and ACOK is high.
I don’t think the adapter or ACIN divider is the issue....

Hi everyone, I’m working on an HP Victus 15 motherboard that previously had a strong short-circuit on 19v line. The laptop now powers on, but system performance is extremely slow and laptop works only on AC adapter
This are Important PIN Voltage Measurements (ISL88739 Charging IC)

1 ACIN 2.08V
2 ACOK 2.94V
3 SDA 3.28V
4 SCLK 3.28V
5 #PROCHOT 0v
10 COMP 0V
11 CCLIM 4.14V
12 FSET 0V
13 BATGONE 0V
16 ACLIM 2.48V
17 NTC 1.60V
18 DCIN 19.51V
20 VDDP 5.15V
21 LGATE 0V
22 PHASE 0V
23 UGATE 0V...

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I have a charger IC similar to the one shown in this figure (ISL88739B). During a short-circuit repair, I had to replace the resistor marked PR13 with a 0 Ω jumper, because the original one was burned and I couldn’t find the schematic for my laptop to know its exact value.

On my board, the current-sense resistor (shunt) is 0.005 Ω (not 0.010 Ω), and I noticed that this small resistor (PR13) is connected between CSIN and the shunt output, forming part of the current-sense network.

Could using 0 Ω instead of the original value (probably around 2 Ω) affect the charger...

Hello .
I have an HP Victus 15-fb laptop with the DAG3PRMB8D0 motherboard, Ryzen 7 7535HS CPU, and RTX 2050 GPU. I had a short on the 19 V line, and I was forced to replace the following components:

1- 2 nmos near dc jack connector
2- ic charger (88739b) + small resistor between CSIN pin and sense resistor output
3- i changed also a 1 dual mosfet in VRM

After replacing the VRM MOSFETs and the charger IC, the laptop works and the CPU survived 🙏

However, now I have a problem: the laptop is very slow, running only at 0.4 GHz.
After...