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Got this in today with a Keyboard issue. I was told the keyboard is dead and needs replacing but Ive never worked on one of these before and looking online replacement keyboards are hard to find and im reading that they are binded somehow to the T2 chip? The odd thing is I tried to do an SMC...

I'm a Prat! thank you xx

You absolute legend!! Ur like a logicboard Ninja! D6990 was dead! replaced from donor board and machine is now working perfectly , thank you so much! But please if I may Inf.. " First, make difference between diode mode and ohm scale." would you mind explaining what I did wrong here? I took...

L7030 Pin1 = 8.25m Pin2 =10.30m (Slowly drops) Pin3 = OL L6995 Pin1= 12.23k Pin2= 59.0k U7000 1 =6.8mv 2=16.51v 3=3.93v 9=31.1mv 12=12.5mv 13=12.5mv 14=12.5mv 15=112.7mv 17=197.5mv 19=5.05v 20=5.05v 27=16.33v

Brought in for no power, Board looks clean, apparently just stopped turning on. NO green light on magsafe ( Using original working battery and Original 85w magsafe for testing ) 3V42_G3H = 0v PPbus_g3h = 0.568 and slowly drops. I've checked all caps and resistors around u7000 and they all...

I have a pile of these all genuine Apple and all in a good working condition, all same result, BIL is removed from start of troubleshooting Measuring SCL/SDA lines on J6950 i get SDA = 3.46 v SCL = 3.46 v Diode mode to ground SDA = 51.0K and slowley rising SCL = 51.0K and slowley rising

ahh gotcha ADAPTER_SENSE central pin of Magsafe connector to pin 5 U6900 tests fine for continuity, no problem there at all.

I presume you mean take the measurements here? Only continuity from the center pin to pin 2 GND on U6900 all traces look good

Did you try known good DCIN board? - Yes tried 3 known good ones to be safe, BIL I noticed on first removing the board that the BIL cable was ripped in two! ( Could this have caused the problem? must have been done when customer fitted a new battery ) so that has been disconnected for all...

Just tried a known good bios with clean me I grabbed of this forum,, same result It seems seems to now run and perform perfectly, from mains, battery or both connected, just no orange light no battery recognised

OK, I got it all back together in the case with everything connected. it now boots and runs fine off both mains and battery and with battery connected or not connected, but the system doesn't show a year on about this mac and it doesn't recognise any battery, I've tried 4 known good ones. This...

I convinced myself it was u7000 causing the issue and as I have a bunch of them I poped a new one on today, this has solved the problem with g3h dropping its now a solid 12.22v without battery connected starts fan spin, but fan runs fast! Still no orange light on charger though. I'll try later...

Now have just the board on the bench, Nothing at all connected. Just spent some time checking all voltages caps and resistors on page 64 of schematic. I cant seem to see anything wrong. all caps and resistors measure good,. But i'm only get around 1.2v and slowley drops on f7040 measuring...

I'm presuming this is something daft before I start stripping the board out but haven't seen it before, Green light on charger, (no orange light) boots and runs fine! Just won't charge Tried 3 known good batteries. But the odd thing is with the battery disconnected I get No green light and it...

Renive?? Did you mean reflow? or Remove? If so how should I be measuring 19/20 and what should I expect a good reading to be?

2 = ol 19 =.014 20 =.011 27 =.501 28 = .500

SO I went to check this and a couple of weird things from last night, PPBUS_G3H voltage (without battery) = .220v PPBUS_G3H voltage (JUST battery) = 11.96v Magsafe green light is real dim and it will now only boot up from battery alone and does nothing with magsafe connected, Also noticed...

R7051 was bad, Changed that and now get 2.2 as scem says, Now getting 140 k and slowly rising on pins 17/18 ? (what should I be getting here?} Still same behavior,only boots in SMC bypass with either battery alone or magsafe alone. Does nothing with both connected but now does not shut the...

Check resistance between pins 17/18 = 8.13k 27/28 = 19.9 ohms Be sure Q7055 is not shorted I/O. Is not shorted to ground but is shorted from I/O testing with another board I see this shouldnt be the case, The mac will boot on battery alone but only in SMC bypass and will boot on magsafe...

I got this 820-2936-B with coke spilled inside it, After putting through the Ultrasonic it came out spotless , It seems to want to try and boot without battery connected ( Gets half way through loading bar and the reboots ) But if I connect a known good battery the magsafe goes off...