Re: Asus X541UVK REV2 Charging Issue

It was only that MOSFET, now everything is normal. Thanks everyone!

Re: Asus X541UVK REV2 Charging Issue



With charger only, all S/D/G were reading 19V. If I connect the battery, the reading is ~battery voltage.



ACDRV is 19V when only the charger is plugged, and just 11.42V after connecting the battery. I can't remove the resistor right now, but I think I found something: the first DCIN MOSFET (M3056M) is now shorting between D and S (0.026Ω), while G to D or S shows 322Ω. I believe it went bad after so much overheating from the attempts of the laptop's owner to charge it, and I overlooked it after...

Re: Asus X541UVK REV2 Charging Issue



The IC is a BQ24780S. I will do the checks you recommended later today and post the feedback here....

Hello. I was given this laptop to attempt to repair.

At first, there were no signs of life and the MOSFET after DC input was heating up really quick when connecting the charger. This looked like a short, and soon I found a bad cap (PCI9102). This was replaced and there was some improvement: laptop powered on with the charger (no battery) and the charging LED came on in orange.

Now I wanted to put the battery back on, but I get the following results:

1. Laptop powers on fine only with the charger (BIOS reports battery 0%).
2. If the battery has...

Re: New Members - please post your introductions here

Hi. Had to repair an Asus laptop with a short circuit, got the board diagram here to identify the bad cap. Thanks and glad to be a part now!