Lenovo ideapad gaming 3 laptop. I did a big mistake

[alex26]

Hello. I have a Lenovo ideapad gaming 3 laptop. I did a big mistake, more precisely I powered a laptop with 61V instead of 19V. I found a shorted coil and injected 1v. TPS65993 is heating up. I powered it through the rectangular plug, not through USBC. It is possible that this integrated circuit has burned out. I can't find a datasheet. TPS65994 can be found at Mouser but I don't think it is a good replacement. This TPS65993 is PD controller.Thanks. Motherboard code is HLG30 LA-L916P.

[alex26]

Hello. I have a Lenovo ideapad gaming 3 laptop. I did a big mistake, more precisely I powered a laptop with 61V instead of 19V. I found a shorted coil and injected 1v. TPS65993 is heating up. I powered it through the rectangular plug, not through USBC. It is possible that this integrated circuit has burned out. I can't find a datasheet. TPS65994 can be found at Mouser but I don't think it is a good replacement. This TPS65993 is PD controller.Thanks. Motherboard code is HLG30 LA-L916P.

What can i measure to see if the Tps is really burnt?

[alex26]

I remove the PD controller and the short is gone. I started the laptop without PD controller and worsk ok but only on battery, but with charger no.

[Sephir0th]

When powered from USB-C, the board can not work without a PD-Controller. It needs to be replaced. You are still very lucky

[alex26]

You are right, I was very lucky especially because it wasn't my laptop, but my power supply went crazy, it jumped from 19v to 61v. The charger doesn't work, I identified the BQ24800 integrated circuit. It wasn't powered because the resistor on Vin was open. I think the integrated circuit is short, but I don't have this exact model and I'll use the BQ24780

[alex26]

I replace the bq chip and the laptop work, but i have another problem. With my external power supply the laptop charges but with the original charger it does not. The charger plug is that rectangular one and I don't know if the problem is with the central pin, although from my power supply I only have 2 pins and the laptop charges.

[alex26]

The laptop works fine, the problem is that the battery does not charge. The battery is detected by the laptop and displayed in windows. The bq24800 battery charging integrated circuit was burned, the 10 ohm resistor on VCC and a mosfet on the charger. I replaced the Bq24800 with the Bq24780S and the measured voltages are those in the picture.
The resistance between ACP/ACN pins of charging IC is 0.
The resistance between pins 18 (SRN) & 19 (SRP) on the charger IC is 20 ohms.
I even have the charging light.
What can be the problem? Thanks.