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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.
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.
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