Recent content by madrefoca534

si, pero solo sin bateria. conectando la bateria no hace nada me llamo la atención, por ejemplo, cuando tengo el equipo conectado con cargador solamente y abro la tapa debería encender solo no?. or que no lo hace. asi mismo cuando presiono cualquier tecla no se enciende.

la bateri se carga se forma normal. de echo ayer estaba midiendo el PPBUS y el equipo encendió solo conectado la bateria y el cargador. y funciono perfectamente. puede haber algún CD3215 dañado por culpa del cable y el cargador anterior??

Hola a todos. tengo en mi escritorio una placa de un Mac A1708, la historia es esta: el cliente solicito un cambio de batería, por que el equipo se apagaba solo. se realizo el cambio de bateria y el equipo funciono bien alrededor de 3 semanas y fallo. en la revisión se detecto que el cable del...

finalmente entregue la maquina su dueño. no quise perder mas el tiempo. gracias por la ayuda 2informaticos.

I'll remove the chip and test it. If it doesn't work, I'll bury it with the others. I have an idea that the computer doesn't allow booting with external devices for that reason there's no USB activity. Another idea is that the chip in question has something to do with the LCD panel.

yes, no activity in ports, no external video, no chime. the CPU and GPU get hot. the mousepad clicks. without the U9850 it should still turn on?

Thanks for the advice. I found corrosion on the U9850 chip, and now I have 0.650 on L7221, L7211, and L7231. But I still have no image or activity on the USB. Is there still hope?

Hello everyone, I have a small problem. On my desktop, I have an 820-00928 motherboard, with no image, no chime, no USB activity, and no external video. The CPU and GPU heat up normally, and the battery charges at approximately 4 Amps. PPBUS_G3H 12.62 Volts. Previously, it was damaged by a...

What I did after soldering the chip was install macOS Monterrey. Previously, the chip was installed on a motherboard with that operating system. After the installation, there were no region issues, and I even installed the latest updates without any problems.

Thanks for responding. I honestly don't know. But I replaced the EFI chip and the problem was solved. Now everything works normally.

Hi everyone, I have a 2017 MacBook Air with corrosion on the U6101 chip. The machine wouldn't turn on. I replaced the affected component and it turned on. Everything is normal, except that when I turn it off, it doesn't turn off completely. The system shuts down, the screen turns off, but the...

Hello everyone. I have a 2020 MacBook Air, 820-02899, on my desk. no liquid damage Stuck at 5 volts, 0.080 mA. Without the battery connected, with the battery connected, 20V, 0.0 amps. This happens on both ports. PPbus_AON 12.2V PP1V5 1.51 V PP3V3 UPC 3.3 V PP3V3 S2 3.3 V PP5V_2 0V, it's not...

The battery is definitely the problem. I tried it with my friend's chassis battery and nothing bad happened. Everything works perfectly. I'll replace the battery. Thanks again for your tremendous help.

A friend lent me a computer with the same specifications, and it's working. The battery is good. I mounted the motherboard on my friend's chassis and it turned on without any problems. So far, everything is fine. My suspicions about the battery are coming true. I'll report on the progress.

I'm using a 140W charger. What else could I do to test it?