Hi all,

i have some A1466 logicboards for gaining soldering and electronic experience. One board has a dead CPU and since i have several spares i want to change it. Unsoldering it was no problem but heat from the top showed that the CPU bent. I think too much heat was the problem.
So for unsoldering my spare parts and soldering back i would ask for some advises.
On most youtube videos you don't get any temperatures. Only helpfull video was one where the heat came from the bottom.
I have a small USB heating plate and a Atten ST-862D with several nozles.

Just to add some voltages:
BKLT_BOOST_THROTTLE_LUXE_L 1,2v (should be 3v for a boost right?)

JP900:
Pin 1 0,37v in Diode mode
Pin 6 0,37v in Diode mode

So backlight communication with M1 chip should be fine?

My new angle sensor cable arrived, i changed the chips and with charger connected the Macbooks starts when i open it up but still no display. -.-
Is there any way to make sure that i have to change the whole screen?
Can the voltages in the area of Q801 to Q803 help to identify a bad screen?
Right now i only get 12v at CW116
4,8v at CP822 and CP823
But nothing else....

So before i get any programmer getting a 3rd party cable and transfer the data chip from my faulty cable would also solve this calibration? Found some videos where they did this.
I'm just not sure if i miss any fault on the board. I don't get any voltage readings at QP800 and surrounding area so can this be a hint for "display sleep state"?...

I took the sensor out and while testing a cap just came off. I will try to clean everything and solder it back first but maybe i have to get a new cable and transfer the chip.
And more observation i can't Start the MacBook with the power button. I have to use a USB or magsafe cable to make it boot. After this i can removed it and it works.
So does this also come down to a non working lid angle sensor?...

So it's me again. I replaced everything and the MacBook starts but still only works with external display.
Opening and closing the MacBook doesn't change anything the external display stays on.
Is there any way to continue finding my fault or how to exclude that i have a logicboard problem?

L6440 and L6441 both show 0,6V.
L6460 and L6461 also 0,6V.
I reballed U6440 and U6460 and soldering back went without any problems....

Little update here. I found a short a U6460 removed the chip and it was gone. After replacing it with a donor i also found a short at U6440. Same game and now all shorts are gone and 1,8v are present but i still get no sound but the noises stopped. I also tried PRAM reset without any success.
So maybe any other ideas? The fan is not the cause of any problem.

Hello mon2,

will try it later but the sound comes right away when i Start the MacBook and doesn't come with speaker FLEX disconnected....

Hi all,

i fixed a A1708 which was not working. Not its booting but the left speaker is making buzzing and sizzling noises. I added a short video to show it.
https://www.dropbox.com/scl/fi/ju6v7...=lewlrdkh&dl=0

I already reflowed the audio codec chips but that didn't help. Any ideas what to do?