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Do you ve a simillar good working board and how much it will cost?

I ve lifted all 4 FET's on the CPU circuit. 1 of them is indeed shorted. you said that this will kill the CPU, is it possible to replace the CPU? And can you explain me how this can be caused?

Just 5v it lets almost 5A be runned. and the CPU become hot. the small DIN become hot first then the big DIN.

On my first post I already said that 2 coils give short. L7520 and L7130. so on L7130 short is also present. (Not L7531 ). now after injecting 5V at pin1 of coil L7520. i can measure on buzzer mode 0.011 in stead of 0.003 what I always measure even after half hour . but on coil L7130 pin 2 the...

I ve injected 5V on pin1 of the coil L7520, the fan begins spinning while the CPU is not getting hot niether other part on the board. only the speed of the fan changes when increasing or decreasing the PP5V_S4 at pin1 of L7520. by the way the ic U7500 and U7501 are out of board when injecting...

Appologies, i ve made a mistake. instead of saying pin1 of the coil L7520, I said Pin2. what I ve done so far is lifting the 4 caps: C7550, C7571, C7552 and C7553. but the short is still there on pin1 of coil L7520. it is coming from PP5V_S4. but at the other coil L7560 no short is there at the...

Q7520 lifted but short is still there. also U7501 lifted and short is still there. test point for short is pin 2 of coil L7520

Short is on pin 2.

Short is always there. And detecting the short on both coils is done without the charger plugged. hope this will make sense. and yes i have the original charger 85w brought by the customer

Hello; i don't get the meaning of this!! i hope that i can get some support soon here in this forum. greeting

5 days ago already said that the short is on both coils. and just before writing my last post my answer was still there. now i don't see it anymore. strange!!! Anyway...

Still waiting for a tip...

After 4 days without power still giving short to ground. the value of the short is 0.002

Hello; I ve got a macbook pro model A1502 with board number 820-3536-A with a the problem that the battery does not charge till 100%. After 40% it stops charging. The laptop stays on my shop for a while waiting for the battery from china that after waiting 5 weeks it seems that the supplier...

Dukefawaks, you are right. The situation is as next. We got 2 macbook air for reparation. I ve mentionned the problem of the one I ve checked. The next day my colleague moves that one from the place I ve lefted him. The next day I ve done some measurement on the wrong one that was put on same...

I ve lifted the coil L7130 because I ve found a short along that line. On both pins of the coil. So to have an indication where the short can be caused is to separate that line where the short is. To get that done I had to lift the coil L7130. Like that I have separatede the U7100 from the...

Hello; I ve done some further measurements. Please check next: 1- At F7700 PPBUS_G3H is 0V 2- L7130 pin1/2 to GND gives short. In diode mode it gives 0.05 3- lifted L7130. Pin2 gives short only. Means short in the direction of pin2. 4- lifted F7140 pin2 only gives short. 5- Pin4 only of Q7700...

Resistance to ground op pin 1 PPVOUT_S0_LCDBKLT 160kohm screen plugged. Without plugged 163kohm. Without power. Q7700 PIN3 1V and PIN4 1V1. Even on F7700 PPBUS_G3H voltage is 1V1. Means PPBUS_G3H is missing.

I see that i can further follow why the PPVOUT_S0_LCDBKLT is not generated. But I faced the next problem: for example need to see if D7710 is ok. Then the L7710 then the Q7700 etc... but those components are at the other side of the board. Need to take it out of the case and test them. The...

By me the battery can be charged till 60%, and stops charging. With the same model.