Re: ASUS ChromeBook C434T not powering on

Have you checked the charger? There is the PD. It needs to switch to 15V charging.

Re: ASUS ChromeBook C434T not powering on

Thanks for the info, even though it's out of date. The identical PA works in some Xiaomi phones, I found a Redmi 6Pro diagram. In fact, this broken path connects one of the IC pins to ground through a 0 ohm resistor. Unfortunately, after repairing the connection and replacing the IC, the speakers still do not work. Headphones work.

Re: ASUS ChromeBook C434T not powering on

The laptop came to me dead - 5V on the power supply and nothing else. The LED does not light up, does not start, does not charge the battery.
A short circuit in the 3.3V line was caused by ANX7447 (3ohm relative to ground). After replacement, no short circuit but the chromebook still did not start. Replacing the TPS62125 converter restored proper operation. The PA (audio amplifier) is still damaged, after replacing +98927 the speakers still do not work. There is a burnt path from the chip that I can't locate - I need a layout app...

Re: ASUS ChromeBook C434T not powering on

I had the same fault. I was able to fix it. The 3.3V converter and the usb control system were damaged. Everything works except the sound on the speakers (there is on the headphones). I am looking for a schematic or application for the max98927 chip.