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I have 0 ohm. The tracks are OK, I send pictures of U7000.

On L7750 I have 0V. F7740 is OK, beep on both sides. On L7030, without F7040, I also have a voltage that fluctuates between 4 and 2 V approximately. No resistance between U7000 pins 17/18 and 27/28.

I had already tried to boot the motherboard without the keyboard with R5014 / 15 but nothing. For PPBUS-G3H, without the battery, the voltage fluctuates between 10 / 9V up to 3.3 / 2V. For the RTC signal, how do I test it, I test the voltage of RTC_RST_L, RTC_CLK32KXTALIN, RTC_CLK32KXTALOUT and...

Hello, I have a MacBook Pro 13.3 "early 2010, A1278, EMC 2351, SN WQ031BPZATM, 820-2879. He does not want to light up anymore because of the water spilled on the keyboard. Green LED of the charger that turns on, but nothing, black screen, no noise, no fan. No visual damage on the motherboard...

PRAM reset done several times but nothing. The screen is the only one I have but it works perfectly with other motherboard. I have to watch if short circuit and if not replace U7701.

8.55V on the pin 1 8.53V on the pin 2

C1 (pin 11/16): 5.10V C4 (pin 14): 3.30V A4 (pin 4): 2.15V A3 (pin 3): 2.78V

What are C1, C4, A3 and A4 on the schematics / boardview?

1: .003 2: .003 3: .674 4: .862 5: .746 6: .578 7: .578 8: .668 9: .673 10: .024 11: .556 12: .707 13: impossible to test, no pad 14: .444 15: .838 16: .556 17: .689 18: .616 19: .700 20: .855 21: .834 22: .833 23: .831 24: .003 25: .868

The chip is well soldered, no worries. Still no backlighting though. When I run the tests while pressing D at startup I have the error PFM006: the SMC present can be a problem. I did a reset SMC and PRAM / NVRAM but nothing.

Deceived thread. Disregard this message.

I ended up changing the MagSafe card + the flexible interconnect mat and it's gone again.

In the end I saw that all the solder pads of R4852 had been ripped out so impossible to change or at worst to bridle. The only solution I saw on the diagrams is to run a thread from a pad to pin 9 of the keyboard / mouse connector. But it's way too small for my material.

I flatly change the chip in the end, the same. Maybe it is actually poorly welded but I even reflect the chip several times and always the same. Possible that the problem comes on the other hand?

I had already tried with another screen at the very beginning of the same problem issues. The screen is normally good. Yes I have a display but dark. 820-2784

Hello, I have an iMac 21.5 "A1311 EMC 2428 from 2011. I already changed the hard drive on it. I have a backlight problem, I have a dark display on the internal screen, on an external screen no worries. Before I had the screen blinking, the brightness only varied. I bought a new backlight power...

Good evening, I have a MacBook Air 11 "A1465 EMC 2631 where the MagSafe LED is off and does not charge. The Mac had suffered a liquid damage (coffee), and I already changed the battery because the other was HS But the MAC refuses to charge more than 8%. On Mac OS X, the battery icon is...

Hello, Sorry for the wait, I was working. I attach the photo of my multimeter with the diode setting used. So: 1: .016 2: .016 3: .712 4: .679 5: .824 6: .512 7: .512 8: 1. 9: 1. 10: .687 11: .562 12: 1. 13: I can not test it, no pad 14: .460 15: 1. 16: .562 17: 1. 18: .712 19: .715 20: 1. 21...

I just saw that I miss the R4852.

1: 3.30V 2: 0V 3: 3.30V 4: 0V 5: 3.30V 6: 3.30V 7: 0V 8: 3.30V No traces of corrosion on U4810.