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SMC Issue on MBP 13 - Hardware Troubleshooting Guide
- Thread starter Dadioh
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Macbook Pro 13
Hello everybody. What a great community I found here.
I got macbook pro 13 2011 model which got liquid on board. After cleaning with IPA starts working, but got problem with dc power. Board only powers up from battery, but not from dc adapter, also not charging. Also tried different dc port. Then dc plug is connected it comes up with green light. Checked fuses which I could possible find on logic board - all fine. Not sure where to start looking for a problem, but I did check voltages on charging unit(photo) if someone could guide me would be great, thanks
[IMG]http://linus.lt/uploads/P_20140324_162529.jpg[/IMG]
Hello everybody. What a great community I found here.
I got macbook pro 13 2011 model which got liquid on board. After cleaning with IPA starts working, but got problem with dc power. Board only powers up from battery, but not from dc adapter, also not charging. Also tried different dc port. Then dc plug is connected it comes up with green light. Checked fuses which I could possible find on logic board - all fine. Not sure where to start looking for a problem, but I did check voltages on charging unit(photo) if someone could guide me would be great, thanks
[IMG]http://linus.lt/uploads/P_20140324_162529.jpg[/IMG]
If you are getting the green light on the macsafe charger connector, and assuming that you are using original charger, then the board is recognizing the charger.
The problem is still likely isolated within the charging system. You might want to check D6990 it should be on the side where heatsink is near the corner of the RAM tray.
Cheers.
The problem is still likely isolated within the charging system. You might want to check D6990 it should be on the side where heatsink is near the corner of the RAM tray.
Cheers.
HDD-Controller defective?
I need professional help!
my hard drive is not detected! Hard drive cable I replaced.
I can boot via USB. Could the HDD controller defective?
Board: 820-2533.
How can I proceed further narrow down the error?
thanks
sorry, Translation via google.
I need professional help!
my hard drive is not detected! Hard drive cable I replaced.
I can boot via USB. Could the HDD controller defective?
Board: 820-2533.
How can I proceed further narrow down the error?
thanks
sorry, Translation via google.
I had the same issue on the mid 2009 15.
It was resolved by replacing the HD connector on the logic board.
It was resolved by replacing the HD connector on the logic board.
I need professional help!
my hard drive is not detected! Hard drive cable I replaced.
I can boot via USB. Could the HDD controller defective?
Board: 820-2533.
How can I proceed further narrow down the error?
thanks
sorry, Translation via google.
me too had a macbook with not hdd recognized , or hdd found after a long time loading.
replaced the cable (with also front thing (maybe front light) and all worked perfectly.
PS: for the 13in mac A1278. after spot the shorted part, today i got a new flux, so tried to solder back the u7000 (the chinese one
) and like magic, battery indicator is back and if press power botton macbook start (ofcourse no post as one component is still wait to ocme from china that made me very happy and feels like a pro tnx to your help!!!!
tnx again everyone
will let you updated
This looks like the best repair thread on MacRumors, so here goes:
I had a problem with Airport on my Macbook Unibody (not Pro) Late 2008. I took it to a technician who discovered a faulty track on the logic board that caused the Airport card not to be discovered. This was repaired and the computer is now working perfectly.
When inspecting the repair, I found other strange tracks on the logic board that seem to be faulty. Here's a picture:
It seems that three solder points are faulty and I measured 0V on them with a multimeter. Does anyone know what these solder points are for? The computer seems to be working fine without them.
Thanks!
I had a problem with Airport on my Macbook Unibody (not Pro) Late 2008. I took it to a technician who discovered a faulty track on the logic board that caused the Airport card not to be discovered. This was repaired and the computer is now working perfectly.
When inspecting the repair, I found other strange tracks on the logic board that seem to be faulty. Here's a picture:
It seems that three solder points are faulty and I measured 0V on them with a multimeter. Does anyone know what these solder points are for? The computer seems to be working fine without them.
Thanks!
I had this problem with this board before.
Check at F6905 it is a fuse and your voltage with the magsafe plugged in should be between 16 and 18v there. This is the first stop pased the magsafe board to check.
Also try starting the board off of magsafe alone ( No battery ) in SMC BYPASS MODE. If the board starts in smc bypass mode without the battery present then you know that there is a problem in the sense line you can start looking at U6900. If the smc doesn't know there is a charger plugged in it wont start the board from it.
Are you working off of a board view and the schematic for this board?
----------
The three traces you are reffering to are as follows
J1300
PIN 12= MCP_DEBUG 1
PIN 14= GROUND
PIN 16= MCP_DEBUG 2
I don't think these are anything to worry about. Hope this helps
Thanks a lot. Do you know when or how the pins 12 and 16 are used?
The MCP_DEBUG 1/2 doesn't help much, I have no idea what that means. To debug the J1300 with an external device or does the Macbook use them?
Logicboard MBPRO early 2011, 820-2936
Hello,
I was trying to fix a defect logicboard (fluid spill I pressume) but I had no luck so far. I am trying to explain what symptomes the logicboard has and what I figured out so far. I have the schematic and brd viewer file.
The logicboard doen't charge the battery. The battery indicator is not working either. The 3.42v and the SMC_BC_ACOK signal are present. The logicboard powers up by itself if battery and charger are connected to the logicboard. It starts and I hear the start chieme and all other voltages are present( and pressumable I will get a correct graphic output but which I couldn't test yet.) I can disable the board and start it again manually like it should normally do. But only then!
When I connect a full battery only the board doesn't start at all when I press PWR ON/OFF. Nothing happens. No SMC_PM_G2_EN signal.
When I connect the charger only the board power up starts oscilating. All voltages power up and down again. The same here, there is no way to start the board manually via PWR ON/OFF button.
I assume it is the SMC IC or anything around it. Might be a I2C communication problem. The SMC bypass does work so one more thing which would suspect the SMC. But I couldn't find any defect component or copper trace around the IC. The problem is where is the best to look at. It is not an easy and more challanging task.
Does anybody has a little hint which brings me to a thing I haven't seen in the forest of trees?
Many thanks,
Mario
Hello,
I was trying to fix a defect logicboard (fluid spill I pressume) but I had no luck so far. I am trying to explain what symptomes the logicboard has and what I figured out so far. I have the schematic and brd viewer file.
The logicboard doen't charge the battery. The battery indicator is not working either. The 3.42v and the SMC_BC_ACOK signal are present. The logicboard powers up by itself if battery and charger are connected to the logicboard. It starts and I hear the start chieme and all other voltages are present( and pressumable I will get a correct graphic output but which I couldn't test yet.) I can disable the board and start it again manually like it should normally do. But only then!
When I connect a full battery only the board doesn't start at all when I press PWR ON/OFF. Nothing happens. No SMC_PM_G2_EN signal.
When I connect the charger only the board power up starts oscilating. All voltages power up and down again. The same here, there is no way to start the board manually via PWR ON/OFF button.
I assume it is the SMC IC or anything around it. Might be a I2C communication problem. The SMC bypass does work so one more thing which would suspect the SMC. But I couldn't find any defect component or copper trace around the IC. The problem is where is the best to look at. It is not an easy and more challanging task.
Does anybody has a little hint which brings me to a thing I haven't seen in the forest of trees?
Many thanks,
Mario
I am not sure, if I had to guess I would say something like J1300 would be used by high level Apple techs. I doubt we would have access to something like that.
Debug is to troubleshoot something. Someone else that knows more might chime in here.
Thanks! The computer works fine without these pins so I won't worry about them.
I have a Macbook Pro 13" logic board 820-2530 that had liquid damage and has been cleaned. It will immediately go to sleep when it gets to the login screen. After pressing a key the board wakes up but again immediately goes to sleep. The lid sensor is on the flex ribbon with the battery meter so I disconnected it which did not help. If I boot from install DVD or Linux disc it will not automatically go to sleep (I presume the proper drivers are not loaded).
Pin 5 on J6955 is the SMC_LID detection so I've checked C6955 & R6961 which are good. My problem lies in R5071 (100K, SMC_LID to SMC IC). The resistor tests bad in circuit at ~10K but after removal it tests fine at 100K. Even if I remove R5071 and boot the system goes to sleep. I do have 3.3V on PP3V3_S5_SMC.
I'm not sure where else to look. Has anyone else seen this problem or have any ideas what else to check?
Pin 5 on J6955 is the SMC_LID detection so I've checked C6955 & R6961 which are good. My problem lies in R5071 (100K, SMC_LID to SMC IC). The resistor tests bad in circuit at ~10K but after removal it tests fine at 100K. Even if I remove R5071 and boot the system goes to sleep. I do have 3.3V on PP3V3_S5_SMC.
I'm not sure where else to look. Has anyone else seen this problem or have any ideas what else to check?
Smc_pm_g2_en
Does anybody know which signals must be present at the SMC before it enables the SMC_PM_G2_EN signal?
THX
Does anybody know which signals must be present at the SMC before it enables the SMC_PM_G2_EN signal?
THX
dieett
Yes, changing that connector would be a good idea. Its a $4 part and can be replaced without removing the logic board.
The old one can be chip quicked off. The old solder removed from the pads with solder wick and flux. Then new solder and flux applied to the pads. The new connector can then be carefully soldered on.
Here is a pix. A folded piece of paper was used here to contain the work area.
Just be very careful in your work. And pull the battery connector before you start..
Do this only after you are tired of trying cable after cable with no good results.
It was the only fix for my Mid 09 15 with the same problem.
https://forums.macrumors.com/attachment.php?attachmentid=467003&stc=1&d=1396303894
Yes, changing that connector would be a good idea. Its a $4 part and can be replaced without removing the logic board.
The old one can be chip quicked off. The old solder removed from the pads with solder wick and flux. Then new solder and flux applied to the pads. The new connector can then be carefully soldered on.
Here is a pix. A folded piece of paper was used here to contain the work area.
Just be very careful in your work. And pull the battery connector before you start..
Do this only after you are tired of trying cable after cable with no good results.
It was the only fix for my Mid 09 15 with the same problem.
https://forums.macrumors.com/attachment.php?attachmentid=467003&stc=1&d=1396303894
Attachments
MBP 2010 i5 Shutsdown when power is connected
I am seeing a strange problem with MBP 2010 i5 15, where it runs on battery fine but when I connect the charger the system shuts down. Also, if I remove the battery and try to run jsut with charger it doesn't. The Magsafe light is green. G3Hot on the debug power pads is at 3.42. One thing however I did notice that Q7080, in Reverse Current Protection circuitry, has gate (pin 4) at 16.5V, pint 1,2,3 source are at 16.5V as well. I wonder if the gate needs to be at 3.4 or 6V at the most. The gate is fed by CHGR_SGATE from our friend ISL6259. I replaced Q7080 but still no joy. Any ideas.
Many thanks!
I am seeing a strange problem with MBP 2010 i5 15, where it runs on battery fine but when I connect the charger the system shuts down. Also, if I remove the battery and try to run jsut with charger it doesn't. The Magsafe light is green. G3Hot on the debug power pads is at 3.42. One thing however I did notice that Q7080, in Reverse Current Protection circuitry, has gate (pin 4) at 16.5V, pint 1,2,3 source are at 16.5V as well. I wonder if the gate needs to be at 3.4 or 6V at the most. The gate is fed by CHGR_SGATE from our friend ISL6259. I replaced Q7080 but still no joy. Any ideas.
Many thanks!
Early 2011 A1278 13", weird behavior
Hi,
this thread is really great, I found a lot of useful info for a start, but the issue I have with this MacBook Pro 13" A1270 early 2011 is really weird.
It did not had water but wine damage, (rosé, if it makes a difference) and would not boot at all when I got it. I removed the battery, cleaned the board connected things all together again and it started to boot, fan full speed and the immediate shutdown. Then no way to start it with the power on button, neither using jumpstart pads on the LB.
So I went over the disassembly, cleaning and reassembly process again and it started to boot, spinning wheel on screen and then shutdown.
So I tried to reset SMC and boot in verbose mode, and for whatever reason, I kept the V key pressed on the keyboard and it worked, complete boot up to the desktop, everything Ok, except that the mouse pointer is jumping from time to time. When I released the V key, I got a message "Are you sure you want to power down your Mac?" with no countdown and then it shutdown.
When I repeat this process, I can make it boot quite easily, provided I keep one keyboard key down. I can even charge the battery.
So I have decided to go deeper in the LB, so I am starting with the LB, the fan and the battery only:
LB is K90i,
G3_HOT is OK,
shorting the debug button pads would start the board once,
Fan is running
then the board shutdown
and no way to jumpstart it again.
Measuring the active debug button pad, when I connect the battery gives 1.3V slowly rising and then 3.42V, this is when the board comes to life, but a few seconds after the voltage drops to 1.3V again an the board stops.
Using a scope, I can see this signal, SMC_ONOFF_L, oscillating, thus giving this 1.3V with a multimeter.
I have been looking for some other signals with the same behavior with no luck.
Any idea? has someone experienced the same boot only with key down?
Thanks in advance for any help.
Cinarca
Hi,
this thread is really great, I found a lot of useful info for a start, but the issue I have with this MacBook Pro 13" A1270 early 2011 is really weird.
It did not had water but wine damage, (rosé, if it makes a difference) and would not boot at all when I got it. I removed the battery, cleaned the board connected things all together again and it started to boot, fan full speed and the immediate shutdown. Then no way to start it with the power on button, neither using jumpstart pads on the LB.
So I went over the disassembly, cleaning and reassembly process again and it started to boot, spinning wheel on screen and then shutdown.
So I tried to reset SMC and boot in verbose mode, and for whatever reason, I kept the V key pressed on the keyboard and it worked, complete boot up to the desktop, everything Ok, except that the mouse pointer is jumping from time to time. When I released the V key, I got a message "Are you sure you want to power down your Mac?" with no countdown and then it shutdown.
When I repeat this process, I can make it boot quite easily, provided I keep one keyboard key down. I can even charge the battery.
So I have decided to go deeper in the LB, so I am starting with the LB, the fan and the battery only:
LB is K90i,
G3_HOT is OK,
shorting the debug button pads would start the board once,
Fan is running
then the board shutdown
and no way to jumpstart it again.
Measuring the active debug button pad, when I connect the battery gives 1.3V slowly rising and then 3.42V, this is when the board comes to life, but a few seconds after the voltage drops to 1.3V again an the board stops.
Using a scope, I can see this signal, SMC_ONOFF_L, oscillating, thus giving this 1.3V with a multimeter.
I have been looking for some other signals with the same behavior with no luck.
Any idea? has someone experienced the same boot only with key down?
Thanks in advance for any help.
Cinarca
hello everybody, I'm glad to have just registered to this forum plenty of information!
Don't know if anyone has encountered an issue as mine, I have a macbook 13 late 2011 that has had prosecco spilled
Before cleaning:
No power at all, with magsafe plugged no led at all, completely dead!
After cleaning: power on, everything works but the fan that speed at maximum since I power on!
All the sensors seem to work right but the rpm on the fan shows me 0 Rpm while it speed!
I have replaced the fan with no difference!
Tested with MRI, everything is good but the fan that has no passed the test (while is good) and sensor voltage that has no passed the test!
The Mac works fine except for This fan issue, I wonder if anyone has encountered the same issue even with the voltage sensor issue, or if there is anyone that can suggest me something to do!
Don't know if anyone has encountered an issue as mine, I have a macbook 13 late 2011 that has had prosecco spilled
Before cleaning:
No power at all, with magsafe plugged no led at all, completely dead!
After cleaning: power on, everything works but the fan that speed at maximum since I power on!
All the sensors seem to work right but the rpm on the fan shows me 0 Rpm while it speed!
I have replaced the fan with no difference!
Tested with MRI, everything is good but the fan that has no passed the test (while is good) and sensor voltage that has no passed the test!
The Mac works fine except for This fan issue, I wonder if anyone has encountered the same issue even with the voltage sensor issue, or if there is anyone that can suggest me something to do!
Macbook Pro early 2011 identify some components!
Hello all!
I am new here but have followed this thread with interest for some time now. This is my first post and i was wondering if someone could help me identify the components i marked out!
I have the schematics from logic board 820-2936-B which seems to be very close to mine. It is a Macbook Pro early 2011 with logic board 820-2936-A. Ìt has been spilled on with some fluid. i have cleaned the logic board like hell with isopropyl alcohol and now it looks pretty good. The other areas outside the pictures was not corroded.
It starts up on power button with rising fanspeed up to max after a short while and stay like this. No chime. No beeps if memory are taken out. Nothing on screen. Battery seems to charge ok indicates as it should on the magsafe too. It seems the CPU gets no power, that area does not warm up at all. As seen in the pics some areas was heavily corroded,
I was hoping maybe some of this components are involved as it was very corroded/burnt on those areas. I would be really grateful if someone could help me out with the component types and values and where to find them on the schematics, i have tried to read the schematics but it is mostly confusing and gets me nowhere as i am to new at this higher level of electronics =)
Thanks!
\\Crawlah
Hello all!
I am new here but have followed this thread with interest for some time now. This is my first post and i was wondering if someone could help me identify the components i marked out!
I have the schematics from logic board 820-2936-B which seems to be very close to mine. It is a Macbook Pro early 2011 with logic board 820-2936-A. Ìt has been spilled on with some fluid. i have cleaned the logic board like hell with isopropyl alcohol and now it looks pretty good. The other areas outside the pictures was not corroded.
It starts up on power button with rising fanspeed up to max after a short while and stay like this. No chime. No beeps if memory are taken out. Nothing on screen. Battery seems to charge ok indicates as it should on the magsafe too. It seems the CPU gets no power, that area does not warm up at all. As seen in the pics some areas was heavily corroded,
I was hoping maybe some of this components are involved as it was very corroded/burnt on those areas. I would be really grateful if someone could help me out with the component types and values and where to find them on the schematics, i have tried to read the schematics but it is mostly confusing and gets me nowhere as i am to new at this higher level of electronics =)
Thanks!
\\Crawlah
Attachments
Hi, guys !
I'm new to this forum . Sorry for my english in advance, since I'm from Latvia .
I have been folowing this thread for a week or more but since I could not find any answer to my questions I wanted to ask directly .
I have a Mac A1342(820-2877-b) that does not power up via megsafe nor battery. I attached also the schematic of the logic board (hope this helps to get further). I believe that some of other schematics meet this one.
As aleardy mentioned in the previous #: I have 3.38 at the G3H, the battery outputs shows 11.20V (1/2/3 pin) and the megsafe ~ 17.14V .
Where should I look next ?
I appreciate any answer, thank you !
I'm new to this forum . Sorry for my english in advance, since I'm from Latvia .
I have been folowing this thread for a week or more but since I could not find any answer to my questions I wanted to ask directly .
I have a Mac A1342(820-2877-b) that does not power up via megsafe nor battery. I attached also the schematic of the logic board (hope this helps to get further). I believe that some of other schematics meet this one.
As aleardy mentioned in the previous #: I have 3.38 at the G3H, the battery outputs shows 11.20V (1/2/3 pin) and the megsafe ~ 17.14V .
Where should I look next ?
I appreciate any answer, thank you !