SMC Issue on MBP 13 - Hardware Troubleshooting Guide

[Dadioh]

I kept my laptop by he window side from which splashes of rain water had trickled inside the track pad .
Without knowing this i restarted my laptop by the morning of next day and i saw my screen with blue & black
squiggles and the system started producing beep sound, so i switched it off by pressing the power button .
even after two days of drying, if i switch on the machine ,fans runs inside & the beep sound is produced continuously along with the sleep light indicator, the screen & other parts except battery indicator and the fan appears dead , no response.

Can anyone figure out what possibly could be the damage for the machine ?

i have these doubts specifically - whether my logic board is failed ? display failed ?
which all parts should i replace by myself to make it working ?
Data loss is not a problem

thank in advance


Plz reply ; model no A1278

Beeping usually means a memory error. Check your memory sticks one at a time to see if one of them has been affected. But given that this happened after a liquid spill I am not convinced that just memory was affected. But worth a try. You need to open up the MacBook anyway to examine and clean the logic board (with battery disconnected of course).

----------

Actually this part is ISL6259AHRTZ, is that the same as ISL6258?

They are not the same but at least it is still pin 14 that carries CHGR_ACOK signal. It should be 3V indicating that the charging circuit is OK.

Pin 1 is indicated by the dot. Count counter-clockwise, 7 pins per side to 28. So pin 14 is the last pin on second side going counter-clockwise from pin 1. Be very careful probing the pin 14 to avoid shorting to pin 13. You should have fine probe tips on your multimeter.

 

[Dadioh]

Thanks for your help Dadioh..

Have checked pin 14 on ISL6258 and the voltage seems to pulse between 3.1V - 3.3V, not stable voltage.

Also just double checked and have found the laptop does not turn on with MagSafe power alone, only turns on once the battery is connected. Similarly if battery is disconnected while laptop is on, this will turn laptop off.

Could this fault possibly be caused by faulty ISL6258?

This suggests that Q7080 is not feeding the bus. It is controlled by the charger ISL6258 pin 26.

 

[macrepair]

This suggests that Q7080 is not feeding the bus. It is controlled by the charger ISL6258 pin 26.

Something very odd just happened! I was testing voltages on Q7080 (Si7149DP) and found 16.7V at the source/gate and 0V at the drain.

I then decide to double check to write down the voltages and suddenly felt the heatsink warming up. I thought that was weird as this board would only power up with the battery connected, so tested drain voltages again and now show 16.7V. I then connected battery and red MagSafe charging light came on! Seems like I must have turned the FET on somehow but not sure how? Could this FET be faulty or perhaps was just stuck?

Have put MBP together again and now it's happily charging

Thanks again Dadioh! Without you I would probably not have tested this FET which has miraculously come to life!

 

[dellxps15]

hi to all the forum members, i've just registered to try to fix a macbook pro 13inch late 2010 (i think)that wont boot or charge battery.

ive read many pages on the forum and ive checked the q7055 and q7056 and results are:
q7055 has 12volt in and 12 volt out on all the pins
q7056 has 12 volt in and 0 out.

do i need to change that q7056 that should be the famous hat1127h that i cant find anywhere except from china or japan.

from china minimal order is 10pcs with a total cost of 54$ shippet to me, while from japan is about 100$ (only ship costs 75$)...

all other voltage ive misured looks good. the 2 pin of g3hot show 0v and 3.42 with magsafe and 3.37 with battery. (but i have a very cheap multimeter).

dunno the board model number. the only thing i know is that it has a p8600 cpu and use ddr3 memory. it's the 13'' board with yellow component on it (while some other 13 pro has all black component in front of you when u open it from the bottom).

i hope to get this macbook fixed with your great help and knowlegde of such a little mainboards

Edit: i forgot to say that macbook pro doesnt turn on, battery indicator are off and shorting g3hot pins doesnt power on. also the press power botton for smc reset doesnt do anything.


Update: ive checked the u7000 and it get very hot. pin 14 give me 0volt, while R7005 give me 16volt, so i think problem is that U7000 that i have ordered and will get it in a month from china

maybe my only problem is that u7000 and q7055 or q7056 are ok by the way.

ill keep you update with my progress.

if i put dc in i have 0 volt in the 24v fuse, but maybe it's normal as i have that u7000 bad.
any other suggestion will be ok.

 

[chigwelldave]

Hi All,

Any gurus here know the early power up sequence for the 820-2879 K6 13"? I'm looking at one with no liquid damage but won't fully power on. When shorting the 'debug' power button, the 3v3 s5 and 0v9 s5 come up briefly but it does not progress to s3 enables. Does anyone know what happens between the s5 rails coming up with (RSMRST_PWRGD) and PM_SLP_S4_L being activated? The 3v3 and 0v9 rails will come up for about 1/4 second each time but something is telling it not to enable the next stage of voltages (5v, 3v3s3 and DDRREG/USB_PWR_EN). Any help much appreciated.

 

[geo1173]

getting just 3 beeps

Guys.. what a great thread .. I am hoping you can shed some light on my issue
I have a MacBook Pro "Core i7" 2.2 15" Late 2011 MD318LL/A.. I am not sure about the original problem with this box.. I got it from a friend who gave up on it; when I hit the power button it wont boot up, fans spin up, front light comes on and it beeps 3 times. if I remove the RAM i get only 1 beep. no video at all.

If I remove the RAM it beeps once.. I have tried different working RAM modules.. (tested on another MBP).. PC3-10600. no difference.

I guess there might be a chip controlling the memory that has shorted.

is there a way to test this?

thx.

 

[Dadioh]

Guys.. what a great thread .. I am hoping you can shed some light on my issue
I have a MacBook Pro "Core i7" 2.2 15" Late 2011 MD318LL/A.. I am not sure about the original problem with this box.. I got it from a friend who gave up on it; when I hit the power button it wont boot up, fans spin up, front light comes on and it beeps 3 times. if I remove the RAM i get only 1 beep. no video at all.

If I remove the RAM it beeps once.. I have tried different working RAM modules.. (tested on another MBP).. PC3-10600. no difference.

I guess there might be a chip controlling the memory that has shorted.

is there a way to test this?

thx.

I remember finding different codes once for failure modes. It took quite a bit of searching. It is possible that the 3 beep code is something other than memory. Maybe the graphics? Maybe try some more searching to see if you can track down the beep codes.

 

[Dadioh]

Hi All,

Any gurus here know the early power up sequence for the 820-2879 K6 13"? I'm looking at one with no liquid damage but won't fully power on. When shorting the 'debug' power button, the 3v3 s5 and 0v9 s5 come up briefly but it does not progress to s3 enables. Does anyone know what happens between the s5 rails coming up with (RSMRST_PWRGD) and PM_SLP_S4_L being activated? The 3v3 and 0v9 rails will come up for about 1/4 second each time but something is telling it not to enable the next stage of voltages (5v, 3v3s3 and DDRREG/USB_PWR_EN). Any help much appreciated.

I have a attached a link to a document that explains power up sequence. It may not be your exact model but the principles would still apply. The English is a bit difficult since the translation was probably done by Google or babble fish or similar. But you should get the gist.

 

[chigwelldave]

Guys.. what a great thread .. I am hoping you can shed some light on my issue
I have a MacBook Pro "Core i7" 2.2 15" Late 2011 MD318LL/A.. I am not sure about the original problem with this box.. I got it from a friend who gave up on it; when I hit the power button it wont boot up, fans spin up, front light comes on and it beeps 3 times. if I remove the RAM i get only 1 beep. no video at all.

If I remove the RAM it beeps once.. I have tried different working RAM modules.. (tested on another MBP).. PC3-10600. no difference.

I guess there might be a chip controlling the memory that has shorted.

is there a way to test this?

thx.

Hi geo1173,

3 beeps usually means 'Bad RAM' so, if you know it's good then maybe there's dirt or corrosion on the RAM sockets or a dodgy power supply to the RAM. As far as I can remember the RAM supply should be 1.3v or 1.5 depending on the RAM type.

The apple beep code table is below:

Mac computers can produce several sounds when starting up. Your Mac should produce the familiar single tone on start up. If you hear another tone it can indicate problems with your computer.

1 tone, repeating every 5 seconds: This indicates no RAM is installed.
3 successive tones, a 5 second pause (repeating): This indicates RAM does not pass a data intregrity check.
1 long tone while holding down the power button: Indicates an EFI ROM update is in progress on a computer manufactured before 2012.
3 long tones, 3 short tones, 3 long tones: Indicates EFI ROM corruption is detected and the computer is in EFI ROM recovery mode.

Regards,

chigwelldave

 

[chigwelldave]

I have a attached a link to a document that explains power up sequence. It may not be your exact model but the principles would still apply. The English is a bit difficult since the translation was probably done by Google or babble fish or similar. But you should get the gist.

Thanks Dadioh,

I had seen the Chinese version of this but the subtlety is in the text - regarding the battery low signal. I will check this tomorrow as it could be the answer as to why S5 is OK but I don't progress to S3 (and then S0).

Many thanks,

Chigwelldave.

 

[canzil]

Hello, this thread is awesome I read several posts but could not find an answer to my issue, so now I'm Brazilian saying that my English is not perfect, I'm using google translator atm.
I have a MBP 13 inch, late 2011 was spilled liquid on the keyboard and it certainly needs to be changed. I disassembled it and cleaned the logic board with isopropyl alcohol, reassembled and the issue continues.
* I'm starting it with a mouse and external keyboard, and an external display too, I can start it but it is giving small locked and appearing every time the "ball of death" spinning. The fan is spinning at super high speed, I made a short video showing it on. It seems to me that the battery is operating normally, including charging.
This link made ​​some screenshots with istat and activity monitor open.
May be someone here can help me with this issue?

Pics, screenshot and video:
https://www.dropbox.com/sh/6vr3icgkf7etzj9/NE1OVf0gbr
video only:
https://vimeo.com/77795537

For now thank you and sorry for bad english.

 

[dellxps15]

Hello, this thread is awesome I read several posts but could not find an answer to my issue, so now I'm Brazilian saying that my English is not perfect, I'm using google translator atm.
I have a MBP 13 inch, late 2011 was spilled liquid on the keyboard and it certainly needs to be changed. I disassembled it and cleaned the logic board with isopropyl alcohol, reassembled and the issue continues.
* I'm starting it with a mouse and external keyboard, and an external display too, I can start it but it is giving small locked and appearing every time the "ball of death" spinning. The fan is spinning at super high speed, I made a short video showing it on. It seems to me that the battery is operating normally, including charging.
This link made ​​some screenshots with istat and activity monitor open.
May be someone here can help me with this issue?

Pics, screenshot and video:
https://www.dropbox.com/sh/6vr3icgkf7etzj9/NE1OVf0gbr

For now thank you and sorry for bad english.

hi, in picture 4, just right up the vga is that component ok or damaged?

 

[canzil]

hi, in picture 4, just right up the vga is that component ok or damaged?

I think is ok, because the notebook is running, but catching as I said, I'm using it on an external monitor, I thought it would not have repair and sold the full screen (not only display) but is still here with me, disassembled, not give already to the person I sold it.

Actually this is assembled, later I can disassembled and check this component if you said I need check it.
thanks

 

[dellxps15]

I think is ok, because the notebook is running, but catching as I said, I'm using it on an external monitor, I thought it would not have repair and sold the full screen (not only display) but is still here with me, disassembled, not give already to the person I sold it.

Actually this is assembled, later I can disassembled and check this component if you said I need check it.
thanks

hard to say from the quality of the picture, but if u can ,just give it a closer look

 

[canzil]

hard to say from the quality of the picture, but if u can ,just give it a closer look

Yes, I can, in 3 hours I'm at home and verify and make a better quality picture.

#UPDATED
I added the pictures on dropbox and I think you right it's damaged, and now?

 

[geo1173]

I have a attached a link to a document that explains power up sequence. It may not be your exact model but the principles would still apply. The English is a bit difficult since the translation was probably done by Google or babble fish or similar. But you should get the gist.

...

----------

I remember finding different codes once for failure modes. It took quite a bit of searching. It is possible that the 3 beep code is something other than memory. Maybe the graphics? Maybe try some more searching to see if you can track down the beep codes.

Thank you. I've been looking around and did not find much..
I got this:

3 Beeps: No Good Banks
"This is another common POST error, meaning that the RAM installed on your computer isn’t properly seated in the tray, and thus not communicating with the motherboard properly. Make sure that the RAM was installed properly on the motherboard, and that the connection diodes are not dirty or broken."

I have cleaned the logic board as it is supposed.. and dont see any damaged diodes.. do you happen to know where these RAM "connection diodes" are located?

 

[dellxps15]

Yes, I can, in 3 hours I'm at home and verify and make a better quality picture.

#UPDATED
I added the pictures on dropbox and I think you right it's damaged, and now?

u need to change that component. as far i dont have your board, u need someone with the same and that can read the code written on it, desolder and change it with a new one. after that we will see if notebook is ok or not.

another good thing is to inspect all the laptop board with a scope to spot any other possible damaged component.

let's wait for someone that know the name of that chip first

 

[dellxps15]

Beeping usually means a memory error. Check your memory sticks one at a time to see if one of them has been affected. But given that this happened after a liquid spill I am not convinced that just memory was affected. But worth a try. You need to open up the MacBook anyway to examine and clean the logic board (with battery disconnected of course).

----------



They are not the same but at least it is still pin 14 that carries CHGR_ACOK signal. It should be 3V indicating that the charging circuit is OK.

Pin 1 is indicated by the dot. Count counter-clockwise, 7 pins per side to 28. So pin 14 is the last pin on second side going counter-clockwise from pin 1. Be very careful probing the pin 14 to avoid shorting to pin 13. You should have fine probe tips on your multimeter.

im trying to desolder that component (ISL6259AHRTZ )with a hot air station set to (410° celsius), but that chip wont come off... it's like it's glued or so.... any suggestion on how to remove it safely ?

 

[canzil]

u need to change that component. as far i dont have your board, u need someone with the same and that can read the code written on it, desolder and change it with a new one. after that well see if notebook is ok or not.

another good thing is to inspect all the laptop board with a scope to spot any other possible damaged component.

let's wait for someone that know the name of that chip first

Yes, Thanks for this, Is easy find this component to replace?

about inspect all the laptop, I go try make something here to you help me to inspect.

Waiting for someone can read the code write on it!!

 

[kamils007]

First thing to fix was the power. The FET by the battery connector was bad after taking some measurements especially D-S. After replacing it, I was getting 12V on Pin 1. Also, I replaced 1uF capacitor next to it. After that the power was back. Now, after connecting megsafe I was getting solid green. My charging issue was easy as I had 'visual hint' the U7000 was burned. Also, one of the 100k resistors on the bottom of the LB was reading 45k. After replacing both the LB started to charge.

It just happens I always get stuck with this issue now - no boot. This LB has pretty much the same problem as the one that I posted 2 months ago. I believe cmdrdata and others were trying to help.

Back than I replaced the CPU Voltage Regular but that didn't help. This chip outputs two very important signals:

PPVCORE_S0_CPU (1.1V)
CPUIMVP_PGOOD (3.3V)

This FET Q7510 on the other hand outputs two very important signals that feed directly to U7400. So like I stated before these two chips output and input signals from each other. I still can't figure out which other signal, resistor or capacitor impacts it so my PPVCORE_S0_CPU and CPUIMVP_PGOOD have both 0V. Need help friends...

CPUIMVP_ISNS1_P
CPUIMVP_ISNS2_P

Hello!
Sorry for my english.
Do you already solved the problem, or who has any?
I have the same problem. Do you have an oscilloscope?
For me CPUIMVP_PGOOD voltage appears at the 0.3-0.5sec. And the end.
I checked everything 100 times;-), I think the damage is CPU-GPU;-( ((.
Motherboard starts at 1 sec. Gets the start Current 0.2A max.
Has anyone mentioned the CPU?
Regards Kamil

 

[rvanpruissen]

Interesting stuff

Interesting read about the MagSafe charger:
http://www.righto.com/2013/06/teardown-and-exploration-of-magsafe.html

 

[Dadioh]

im trying to desolder that component (ISL6259AHRTZ )with a hot air station set to (410° celsius), but that chip wont come off... it's like it's glued or so.... any suggestion on how to remove it safely ?

It is just held by solder. There is a thermal pad under it so it takes a bit of heat. I use 500C and takes about a minute to get it hot enough to pluck off with tweezers. Be careful not to bump any other components at this point or they will move and you have a bunch of extra repair work. Lift it straight off the board with tweezers.

 

[canzil]

SMC Issue on MBP 13 - Hardware Troubleshooting Guide

#update
dellxps15
I finally can read the component: it's E3 4B
and now dellxps15??

 

[simon66]

It is just held by solder. There is a thermal pad under it so it takes a bit of heat. I use 500C and takes about a minute to get it hot enough to pluck off with tweezers. Be careful not to bump any other components at this point or they will move and you have a bunch of extra repair work. Lift it straight off the board with tweezers.

@Dadioh Maybe you can help me out.

I've got a Macbook Pro 13", Model A1278. This machine was left on + charging for 7 days straight. When we came back from carnival, it wouldn't turn on.

In Brazil power goes out some times, so I don't know if the power went down and came back quickly, thus burning something (I don't have a surge protector).

The EMC No. is 2351

When the Magsafe is connected, a green light appears then orange (The battery is undamaged and it charges fine). Once the battery is full the orange light goes away. I'm assuming that's not damaged.

When I press the power button, nothing turns on. No fan, no screen. The light changes from orange to green, then orange again. Occasionally, when the magsafe isn't connected for a long time, the light on the Magsafe is dim green. I then disconnect it, press + let go the power button and re-connect the MagSafe and the light is now back to normal.

I've tested the g3hot and I get 3.4v and 0v.

This thread has a bunch of boards numbers and is really hard to keep up. I've read all posts but still nothing.

What should I do next? I really don't want to spend $700 on a new logic board.

Thanks!

 

[canzil]

@Dadioh Maybe you can help me out.

I've got a Macbook Pro 13", Model A1278. This machine was left on + charging for 7 days straight. When we came back from carnival, it wouldn't turn on.

In Brazil power goes out some times, so I don't know if the power went down and came back, thus burning something.

The EMC No.: 2351

When the Magsafe is connected, I get a green light then orange (The battery is undamaged and it charges fine). Once the battery is full the orange light goes away. I'm assuming that's not damaged.

When I press the power button, nothing turns on. No fan, no monitor. The light changes from orange to green, then orange again. Occasionally, when the magsafe isn't connected for a long time, the light on the Magsafe is dim green. I then press the power button and re-connect the MagSafe and the light is now back to normal.

I've tested the g3hot and I get 3.4v and 0v.

This thread has a bunch of boards and is really hard to keep up. I've read all posts but still nothing.

What should I do next? I really don't want to spend $700 on a new logic board.

Thanks!

Just to say hello to another brazilian in this thread don't want spend a lot of money in new logic board
Welcome amigo.