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Hi fellow repair gurus,
Liquid damaged A1707 was stuck on 5V. I replaced corroded CD3215 and SMC now successfully raises voltage to 20v.
The fans spin, the screen comes on and displays a "low battery" sign before the machine shuts down.
After that the screen and fan stays off but PPBUS_G3H continue to toggle every 4-5 secs between
- 11.4v (and 170mA current draw on usb-c power meter)
- 12.6v (zero current draw)
The toggeling occurs when battery is connected but regardless if external usb-c is connected or not. It seems... -
Hello, Namaste.
We have an iphone 11 for which we had changed the NAND IC and upgraded from 64gb to 128gb.
After upgrading the iPhone shows a Temperature Sign but there is no heating in the board. We did a lot of trial and error and found that whenever the Charging Flex and Power Flex are connected together the sign shows. If either one is removed there is no such sign.
We replaced the lower board just to check if there was a problem with the connection pads maybe but the issue persists.
I think we have messed up while replacing the NAND. Any help from anyone... -
I have repaired a Sign WiFi Smart Plug with model number: SNSM-WASINGLE sold by Spares Nordic AB in Sweden.
The fault condition was that the device gave no signs of life: pressing the push button did not cycle the internal relay and the blue LED did not come on and it was not seen on the WiFi network.
The fault was very simple, capacitor C3 on the PCB with writing "KSJ" and "LOWESR" had literally blown its top off, after replacing it the device works fine again!
As I find linear high voltage regulator designs interesting I drew up the attached schematic... -
Today I receive a MacBook Air A1932, its apple ID has been deleted but when I am resetting it is showing a message(sign out of find my ) customer's have no apple id he bought this MacBook from someone else can someone help me remove this message... -
Hello Namaste!
I have a macbook a2141 that shows the charging sign when the charger is plugged in but doesnt turn on.
PPBUS_G3H is a good 12.6V.
The amp meter shows its drawing 20V.
The board is clean. I couldnt find any shorted component on the 2v5 SSD lines but the voltage is 0V. Resistance is also 100 Ohms i think it should be 400 ohms.
DFU Revive gets stuck in the middle / I get apple logo and loading bar on the screen. Then i get the lock sign on the Configurator.
Even did a DFU Restore. Same thing happened....
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