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omac03

macrumors newbie
Aug 5, 2012
8
0
Missisippi
Trouble with Macbook Reporting Charging

Hey everyone, I have been working on this water damaged Macbook that thanks to this I have gotten working besides this last issue.

I replaced the Q7055 mosfet and got the macbook charging the battery now. The problem is now that the computer is not sensing that the macbook is charging the battery but Coconut battery shows that the charge is increasing. The magsafe cable has a dim green light at all times. It does not change to orange or get bright at all.

The macbook can now turn on without doing the SMC bypass. The battery is seen by the computer it just does not show charging. But when the battery is fully charged the Macbook says its charged.

I also have no G3Hot on the magsafe DC in board. I have it on the battery 2 pins. Just trying to see if anyone knows where i might look to speed up the troubleshooting.

Thanks!
 

mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
Hey everyone, I have been working on this water damaged Macbook that thanks to this I have gotten working besides this last issue.

I replaced the Q7055 mosfet and got the macbook charging the battery now. The problem is now that the computer is not sensing that the macbook is charging the battery but Coconut battery shows that the charge is increasing. The magsafe cable has a dim green light at all times. It does not change to orange or get bright at all.

The macbook can now turn on without doing the SMC bypass. The battery is seen by the computer it just does not show charging. But when the battery is fully charged the Macbook says its charged.

I also have no G3Hot on the magsafe DC in board. I have it on the battery 2 pins. Just trying to see if anyone knows where i might look to speed up the troubleshooting.

Thanks!
What unit are you working on? 2010 13" macbook pro? Where was the mosfet located?
 

mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
I have a 2010 13" macbook pro that will not power on. The magsafe is good, but I get no light on it what so ever. G3HOT is 1.16 v. How can I determine if the ISL6259 is bad? I am getting 12.05v to battery pins 7,8,9
 

omac03

macrumors newbie
Aug 5, 2012
8
0
Missisippi
I have a 2010 13" macbook pro that will not power on. The magsafe is good, but I get no light on it what so ever. G3HOT is 1.16 v. How can I determine if the ISL6259 is bad? I am getting 12.05v to battery pins 7,8,9

Well first thing to do is tell what is pulling down your G3Hot. It should be 3.3V on battery connectors 4 and 6.

You need the schematic on page 69 and find out what is pulling the G3HOT down. Then once you have that then I would look to the battery charging circuit.
 

mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
Well first thing to do is tell what is pulling down your G3Hot. It should be 3.3V on battery connectors 4 and 6.

You need the schematic on page 69 and find out what is pulling the G3HOT down. Then once you have that then I would look to the battery charging circuit.

Are you talking about the G3HOT circuit? On my schematic it is page 57. I can not find the mosfet LT3470(U6990) on the board. I am pretty much a beginner on this.
Q7080 pins 1,2,3 are 15.89v, pin 4 = 14.75v, pins 5-8 = 16.4v
Q7085 pins 1,2,3 are 15.89v, pin 4 = 5.53-5.59, pins 5-8 = 15.89v
fuses are good.
Q7055 pins 1,2,3 are 12.06v, pin 4 = 5.19v, pins 5-8 = 12.06 with battery plugged in.
 

omac03

macrumors newbie
Aug 5, 2012
8
0
Missisippi
Are you talking about the G3HOT circuit? On my schematic it is page 57. I can not find the mosfet LT3470(U6990) on the board. I am pretty much a beginner on this.
Q7080 pins 1,2,3 are 15.89v, pin 4 = 14.75v, pins 5-8 = 16.4v
Q7085 pins 1,2,3 are 15.89v, pin 4 = 5.53-5.59, pins 5-8 = 15.89v
fuses are good.
Q7055 pins 1,2,3 are 12.06v, pin 4 = 5.19v, pins 5-8 = 12.06 with battery plugged in.

Ok so it seems that all your mosfets are working. Yes I just realized that I was looking at the wrong schematic. For the K6 macbook (Mid-2010) on page 57 yes the G3HOT circuit. I am not sure on the location since Im at work, but look for the following part, see attachments. You shoulld be seeing 16-18VDC on pins 6 and 8. And seeing ~3.425VDC on pin 2 and should see around ~1.25VDC on pin 1 which is created by the resistor divider of R6995 and R6996.
 

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mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
OK, I found the little sucker. 1.25" west of the LVDS connector.

I have attached a photo showing the values of the points.

Thanks again.
 

Attachments

  • LT3470 MBP 2010 13%22.jpg
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MR2012

macrumors newbie
Aug 9, 2012
1
0
Natick MA
Macbook air A1369 2010 model no lcd backlight

LCD backlight issue, measure the fuse, it is fine and the only thing bad is a 6pin chip on the back which i couldn't identify. The label was on this chip is CEU(is it a customized chip?). does anyone know what this chip does? and what is the part number? I would appropriate if someone provide the board view and schematic for A1369...
 

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omac03

macrumors newbie
Aug 5, 2012
8
0
Missisippi
OK, I found the little sucker. 1.25" west of the LVDS connector.

I have attached a photo showing the values of the points.

Thanks again.

Ok starting bottom left Where you have .62V I have the following.

1.254, 3.38, 6.97, 3.38

The two pins that have 2.73 I have 16.7VDC so to me that your first problem. Need to find R6905 and see if you have 16.7VDC on either side of it. If missing both then need to go further into the circuit to see where the open is occuring. You said that Q7080 and Q7085 had the correct voltages so my guess would be R6905.
 

mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
Ok starting bottom left Where you have .62V I have the following.

1.254, 3.38, 6.97, 3.38

The two pins that have 2.73 I have 16.7VDC so to me that your first problem. Need to find R6905 and see if you have 16.7VDC on either side of it. If missing both then need to go further into the circuit to see where the open is occuring. You said that Q7080 and Q7085 had the correct voltages so my guess would be R6905.

Attached photo of new values. I believe that this is the R6905 located on the top of the board. Could it be that this is the culprit?
 

Attachments

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omac03

macrumors newbie
Aug 5, 2012
8
0
Missisippi
Attached photo of new values. I believe that this is the R6905 located on the top of the board. Could it be that this is the culprit?

Yea measure the resistance and see if it is 1 ohm is it isn't, and I suspect it ain't. Need to replace it.

Basically it's like a fuse.
 

Hoel

macrumors newbie
Aug 10, 2012
1
0
A1286 powers, charges, no chime, no POST?

Hi everyone,
I've read nearly completely both threads about SMC and backlight issues but couldn't find much info on what i'm facing with this 15" A1286 MBP (2009 2.4/2.6Ghz? missing label, model with single fan).
It was presumably dropped, one corner is slightly bent.
No liquid damage, or at least no trace of corrosion damages.
LVDS connector was slightly impacted (3 pins on left).
I dissoldered it/cleaned pads carefully before any test (with reflow station and flux) to avoid possible shorts. For instance i haven't put back the new LVDS connector, if i bring it back to life i'll use remote desktop and take care of LVDS/internal screen later.
Here is the problem:
  • starts with power button
  • front led and fan start
  • hard drive spins
  • no chime
  • no superdrive init
  • shuts down after few seconds
  • restarts itself
  • -same as above-
  • stays ON, HD spinning and front led ON...

I can boot in debug mode ("bypass smc") with the power button/magsafe plug trick, in this case it behaves the same as above with fan at max speed as expected. It is charging correctly. I cannot get the firmware update mode (front led quickly blinking) when keeping pressed power. but this is probably after POST like chime and superdrive init and I presume the MBP stuck before POST.
Any ideas?
A little link for those who are looking for schems :
schems
Thank's
Hoel
 
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brianjohnstone

macrumors newbie
Aug 10, 2012
1
0
uk
hi guys,

absolute noob to the forum here.. but i have to say what a read this thread is!! ive been looking for the answer to my problem for some time and it seems like its in this thread somewhere, sorry if what im about to ask has already been posted but ive gotten a bit lost through all of the pages.. so here goes:

my late '08 non pro macbook unibody a1278 was fine until a few months ago, then it has developed smilar problems to those listed here:

the battery is not recognised however the macbook thinks it's running on battery (brand new), but will only run when connected to magsafe (just shows solid bright green light), when disconnected just goes to sleep.

it has been working fine like this for a few months until a few days ago, when i suddenly have no power at all and nothing showing on my magsafe (which is brand new)

i previously tried changing the dc board but no joy.

i was hoping that someone here may be able to list things to check on this model and try before i scrap it completely. (sorry if this sounds lazy but i did start to get really lost in the thread)

cheers in advance for any help.

brian.
 

zakiyy

macrumors newbie
May 14, 2011
2
0
Mackbook 13'' late 2009 - DEAD/NOT on but Charging LIGHT on!

I have a MCB 2009 it is dead but when PLUG the charger you can see the light YELLOW!! (i.e the magsafe show YELLOW light) I tried to remove the PCB and short pin 5 + 29 checking if the FLEX is fine still NOT on.

Do you have any other suggestion !! Am sending two Pictures of the PCB please guide which parts i need to check !!

attachment.php

attachment.php
 
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frygor

macrumors newbie
Aug 11, 2012
1
0
Found this very interesting thread and got alot of information about SMC issue but unfortunately I can't get a MBP 13'' Mid 2009 to work.

Story:
MBP suffered a flower vase drop and some water got on the keyboard (smells nice now :D ) and it didnt shut off automatically and was immediately brought to me and by then it shut off. I removed the battery and cleaned it and let it dry for a day.
No visible damage on the logic board.

Now:
It will not turn on!
Magsafe turns green and then orange to charge the battery. Turns green when battery is full.
Battery responses on the battery-test button on the side and show correctly its levels.
No fan movement or other activity.

Measurings:
Battery connector:
1,2,3pin - 0V
4,6 pin - jumps fastly between 3.22-3.40V
5 pin - jumps fastly between 0.02-0.05V
7,8,9 pin - 12.43-12.44V

G3Hot - 3.42V
SMC bypass doesn't do anything.

And what I think are fuses 2 of them (pic), that i found at first sight, are showing:
near magsafe: 0V (when ac is on and battery is off) and with no power 663Ohm.
near the battery connector: 12.58V goes trough when AC is on and with no power it shows resistance 1-2ohm .
First one doesnt beep when testing with the beep-thing on multimeter and the second one does.
So the first one is dead?

Sidenote: I'm novice at this electronics measuring and schematics reading. :)

 

U-234

Suspended
May 16, 2012
72
0
Chicago, IL
Got Power but won't pass the POST no beep

Hi Everybody, i'm back after working on other project. I got a new A1278 early 2011 LB 13' i5 that had no power. After few days I replaced few things and the LB is alive again! However, the problem is that I won't complete the full POST which means:

-no video
-no beeps when RAM removed
-after 30s the fan goes to full speed.
-Diode D9410 (Screenshot below) i'm getting 7V when compare to proper values I should be getting around 0V-0.8V. This is part of the High Voltage Power Switch Circuit so getting the wrong voltage here can effect that POST never completes or even start?
-tested with battery or megsafe which makes no difference
-megsafe turns oranage (I assume it charges battery properly)
-all tanl Caps by the battery connector including the fuse and green resistor getting 12V

Diadoh/Cmdrdata or anybody can give me some further pointers what can be the culprit here.
 

Attachments

  • Capture.PNG
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cmdrdata

macrumors 6502
Jun 10, 2011
377
2
Dallas, Texas, USA
Found this very interesting thread and got alot of information about SMC issue but unfortunately I can't get a MBP 13'' Mid 2009 to work.

Story:
MBP suffered a flower vase drop and some water got on the keyboard (smells nice now :D ) and it didnt shut off automatically and was immediately brought to me and by then it shut off. I removed the battery and cleaned it and let it dry for a day.
No visible damage on the logic board.

Now:
It will not turn on!
Magsafe turns green and then orange to charge the battery. Turns green when battery is full.
Battery responses on the battery-test button on the side and show correctly its levels.
No fan movement or other activity.

Measurings:
Battery connector:
1,2,3pin - 0V
4,6 pin - jumps fastly between 3.22-3.40V
5 pin - jumps fastly between 0.02-0.05V
7,8,9 pin - 12.43-12.44V

G3Hot - 3.42V
SMC bypass doesn't do anything.

And what I think are fuses 2 of them (pic), that i found at first sight, are showing:
near magsafe: 0V (when ac is on and battery is off) and with no power 663Ohm.
near the battery connector: 12.58V goes trough when AC is on and with no power it shows resistance 1-2ohm .
First one doesnt beep when testing with the beep-thing on multimeter and the second one does.
So the first one is dead?

Sidenote: I'm novice at this electronics measuring and schematics reading. :)

[url=http://www.upload.ee/thumb/2587562/DSC_5815.JPG]Image[/url]

The white block near the LCD connector is NOT a fuse. That is a hi-frequency capacitor for the LCD driver. The one near the artery connector is the system fuse and since it shows 12v on both side, the reuse is OK. Your problem is further down the line, i.e., derivative power supplies that are generated from the 12v after that fuse, or signal line that tells the SMC/MCP that all system components are OK. It will be hard to identify which one at this time.
 

jugger18

macrumors member
Jul 23, 2007
38
0
My guess would be the power switch died in the vase/water spill. Will it start by jumping the g3hot?
 

mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
Does anyone have the schematic for the 2009 15" MBP 2.53GHz? I believe it is K19I. I have a dead one I am working on and trying to trace circuits.

Thanks.
 
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omac03

macrumors newbie
Aug 5, 2012
8
0
Missisippi
hi guys,

absolute noob to the forum here.. but i have to say what a read this thread is!! ive been looking for the answer to my problem for some time and it seems like its in this thread somewhere, sorry if what im about to ask has already been posted but ive gotten a bit lost through all of the pages.. so here goes:

my late '08 non pro macbook unibody a1278 was fine until a few months ago, then it has developed smilar problems to those listed here:

the battery is not recognised however the macbook thinks it's running on battery (brand new), but will only run when connected to magsafe (just shows solid bright green light), when disconnected just goes to sleep.

it has been working fine like this for a few months until a few days ago, when i suddenly have no power at all and nothing showing on my magsafe (which is brand new)

i previously tried changing the dc board but no joy.

i was hoping that someone here may be able to list things to check on this model and try before i scrap it completely. (sorry if this sounds lazy but i did start to get really lost in the thread)

cheers in advance for any help.

brian.

First start checking the fuses to see if you have voltage on both sides. The one near the DC in board should have 16-18VDC on each side and the one near the battery should have ~12VDC on both sides. Check that first and also see what G3Hot is.
 

mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
Hey what are you using to get the screen shots so close? I am needing something at home to be able to solder SMD parts.

Got it on ebay under $40. Stand is not that great. Mine only works on PC fully. It does work on mac, but you can not record video or take a photo. So I just use shift/command/3 for screen shot. I bought the 500x, but the 800x is the same price.

Search on eBay
"8-LED 2MP USB Digital Microscope endoscope 2.0 Mega Pixels Magnifier 20X~800X"
 
Last edited:

mac-n-sauce

macrumors regular
Jun 25, 2012
209
2
Tampa, Fl
Attached photo of new values. I believe that this is the R6905 located on the top of the board. Could it be that this is the culprit?

Ok, I have replaced the resistor with a new one. That was fun for my first solder job. Little tiny guy! 0805 package 1ohm. This is R6905 on the G3HOT.

I know have on the LT3470A(U6990):
Pin 1, 2 = .63v
Pin 3 = 1.98v
Pin 4 = .70 v
Pin 6(VIN) = 16.17v
G3HOT = .63 before i replaced the R6905 I Had 1.16v on G3HOT
I need help figuring this out from here. I have No magsafe lights at all.
Obviously no power on at all.
How do I determine if the LT3470 is bad, or where do I go from here?

Also, I have no power getting to the battery connector.
 

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  • 1 ohm resistor.jpg
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