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Hi guys I have an 3476 with liquid damage at C7622 the line was burned. I wired it to C7624. Still there was a short on PPBUS_S5_HS_COMPUTING. I found Q7630 a bit hotter then the rest and replaced it. The short circuit is gone and instead 1.2v I get 12.56v on PPBUS. Now the board is power...
P5VS3_EN came up for a split second on Pin 4 at 3.3v. L7520 pulsed as well, once i saw 5v but after a few tries 3v. I think it might just not be long enough of a pulse to show 5v.
I have this board which had quite some liquid damage and was molested by another shop before. Since it is not too busy I decided to give it a try. I replaced all missing IC and cleaned it. I got PPBUS at 12.56v and PP3V3_S5 on L7560, on L7520 0v. Looking at U7501, I got 3.42v on pin 12. P5VS3_EN...
Did a pram reset and no image on external display. I found I have no power on PPVCORE_S0_AXG, I guess I need this for the display to work.
EDIT: I figured no AXG is normal when booting, so will check the rest. I connected a speaker and I do not get a chime and pram also doesnt seem to have any...
Hi guys i have an 820-3115 that had a corroded C7156 and little burn damage in the board, made a wire from pin 1 to pin 1 from C7562 and that seem to have done the job as I got fanspin. I dont get orange light though. I do have 3.42v, PPBUS is 12.31V with and without battery connected. I get...
Hi Guys, i have an 820-3115 with no display. Fan spins and i get a green light (no battery connected), mouse cursor lights up. 0V on PPVOUT_SW_LCDBKLT. I had no SMC_LID, some liquid going on in that area. Replaced R5071 and now have 3.4v here. Still have 0v on R1981 LCD_BKLT_EN which comes...
Found the issue, the SSD seems to short the board. Weird thing is i tried and external SSD that didnt work. Now i used an known working internal SSD and it works. Thanks so much for the help learned a lot again, this case can be closed!
I tried another BIOS but the same, also did a pram reset for good measure but that didnt seem to work at all, no flash in the display. So the mac spins 3x, then the display turns on but stays black. Option key also did not respond. After a minute or so fan starts to spin high (not that I only...
Hi Guys, I get a kernel panic on a Macbook 12 inch 2015, is this one ripe for the pile? See attached image:
https://drive.google.com/open?id=12o6b4ScNOQOHNaVVW1pwlyYVrLDAaJJv
Hi guys working on an 820-00138-A with no backlight. I only have schematcs for the 820-00138 but they layout doesnt match. Is there anything similar to 820-00138-A that I can use? I need to know the board layout faround U7701, have a burned pin and I expect its 5V line but not sure so its kinda...
Hi guys I have a 15 inch retina 2015 with no backlight. I have 12.56v on PPBUS side and 12.45 on PPBUS_SW_LCDBKLT, on pin 1,2, 5, 6 i get 0.1v only it look like it doesnt get enable signal toopen the gate. On pin 1 of LCD connector also no voltage. I only have schematics for this board, just...
Hello, I have this 13 inch Air with no display. Backlight turns on 25v and also have 3.3v going into the display connector. Tested with another working display and same, i can see it turn on but no apple logo appearing. What to check?
Resistors on SMBUS, LED Return and DPI Int are measuring OK