👀 MacBook Air A2179 💻 820-01958 🔥 5v No Power 🥺
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- เผยแพร่เมื่อ 10 ก.พ. 2025
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Repairing Apple Macbook Pro iPhones iPads in DFW area and nearest cities
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Great video you did great diagnosis and testing quickly and found the bad cap asap!!
Thank you 🙏
Im hoping you can help me. My MacBook Air (Retina, 13-inch, 2020) A2179 is not turning on. When I plug in the power supply, only the fan turns on. If I disconnect the battery and connect the power supply, again only the fan turns on and still no power. I'm guessing it's not a battery issue but a logic board issue. What do you think is the issue? Logic board related? Or replace the battery?
muy buenos tus videos... tengo una macbook air A2179 la compre para repararla de la pantalla, ya la cambie, al encenderla solo me deja entrar por modo de recuperación por internet y al seguir los pasos me pide que ingrese la cuenta de correo pero lo la se ni la persona que me la vendió, ay alguna forma de quitar o formatear sin ocupar la cuenta o ya no sirve? gracias
No creo amigo
Buen dia colega Juan4Repair, saludos desde Xalapa, Veracruz.México.
Escribo para felicitarte por tan buenos videos y pedirte una asesoria.
Tengo este mismo equipo 820-01958 que me llego con daño por liquido en la zona del U3100, F3000 y D3322. Ya los quite y los reemplace por unos nuevos.
La macbook presenta un consumo de 5v y 220ma y después de 13 segundos se apaga el consumo y vuelve a encender.
Soy un tanto nuevo en la reparación de estos modelos, los anteriores los domino bien.
Tienes algun video con ese comportamiento? o que me recomiendas hacer?
Gracias por tu tiempo
Que más hermano saludos, el reinicio es en puertos? Chequea si las G3H se están creando, DCIN_G3H, BUS_G3H y 3v3_G3H
@@Juan4Repair Estos son los valores que tengo.
PPDCIN_G3H 5v. Se apaga al apagarse el puerto
PPBUS_G3H 12.28 v Se apaga al apagarse el puerto
PP3V3_G3H 3.3v Se mantiene aunque se apaga el puerto.
PP3V3_G3H_RTC 3.2 Se apaga al apagarse el puerto
PP5V_G3S 0v.
Como uno de los puertos no encendia, quite el U3100.
Estoy haciendo las pruebas solo en el puerto del U3200 sin el U3100 instalado. ¿ Hay algún problema por eso?. Pregunta de novato en estos modelos. ¿Debería funcionar con solo este chip instalado?
Según lo que entiendo de algunos video que he visto, una de las primeras señales que generan los U3100 y U3200 es la linea PP3V3_UPC_X_LDO para encender la EPROM.
En mi caso esta linea PP3V3_UPC_X_LDO la tengo en 0v. repito solo con un U3200 instalado.
Te agradezco tu tiempo y valioso conocimiento
Si o si requiere el otro puerto no te trabajará con uno solo
Great video 👍👍👍👍
Thank you 😊
not bad! if im going to be a critic, id say explain next time why you didn't need to replace the cap. im guessing because there were so many in series, the one didn't make that much difference, is that right?
Thanks and yes.
It only increases the odds for more in series to fail.
That’s correct buuutttt yes the rule says that the cap needs to be replaced and I do it almost the 95% of the time but on the videos to not make it longer just shows the repair.
what is the voltage by power suppy?
Always 20V and 5.1A that’s how I set up my power supply for all Macs
Gracias por tus vídeos. me sirven de mucho. Sabes donde podría conseguir el software que usas para abrir los BV y los pdf a la vez? gracias de antemano
Xinzhiao
Very nice explanation! Thanks!
Thank you Vlad, my pleasure 🙏
Thank’s , very helpful, but what’s software do you use please?
Flexbv
Where can I get schematics!! And board layout???
Xinzhizao
Hello can you tell me where I can find the t2 rom chip on the A2179 logic board please.
Is the big IC that says T2 on top I think is under a shield together with the power supply.
@@Juan4Repair Thanks for the reply oh ok ill check it out. Do you happen to have a pic of one pointing it or maybe a video you can link to me. Thanks
No sir I do not.
@@Juan4Repair oh ok thanks agian
Profe me pasa que programa usa porfavor
FlexBv
did you have to replace that cap or no?
??
@@Juan4Repair the cap you removed to get it working, did you have to replace it or it doesn't matter?
@@restechrepairs2793 oh ok, yes I always recommended to replace it.
@@Juan4Repair im getting 12v on ppbus_g3h but only 5v into the port, what do you think the issue could be? board had a coffee spill but no signs of damaged components
Could be anything hard for me to give you any advice if there is liquid involved
Hi, can u tell me whats voltage and Amp did u inject please?
I don't remember at the moment but I'm pretty sure I say in the video.
@@Juan4Repair no you dont say it
maybe 12v
Gracias profesor. !!!
Gracias por el apoyo Cesar 🙏
@@Juan4Repair where you from? Very good video it helped me lot
nice video, what software are you using
Hey what's up guys. Xinzhiao
tnx for sharing this video
idol
Any time my friend.
Our donde compraste el tester que connects te Al power can you let me know please
No entendí? Donde compré el tester? Cual?
Si donde miras las amo y los volts
Donde miras las Amp los volts que la computer is drowning in
Nice video my friend
Thank you man , 🙏
Amazing skill ! I don't know where do the schematics come from, and which "find out where the IC is" software you use, but it is impressive. I would live close to your workshop to bring my A2179 MBA, but Europe is too far !!!
Hey Macfunz, the App is Xinzhiao is a pay application. Good luck man.
@@Juan4Repair Thanks !!! I finaly found a very nice repair shop near home, using similar (but not Xinzhizao) schematics application they fixed the power supply side and replaced the dead battery.
@@macfunz good to hear. How much did the repair cost?
@@tiranasawrus5148 Around 180 Euros. Not original Apple battery but a good one, it is a part of their reputation.
profe mas videitos en español por favor
Si ya estoy editando otro sale en par de días y está bastante bueno.
Where do you get the schematic and board layout??????
Xinzhizao