SMC Issue on MBP 13 - Hardware Troubleshooting Guide

[bitsnpcs]

13" A1278 No power, no light on mag?

Hi guys and what an excellent thread, thanks so much for your efforts helping others already.

Ok so I wonder if anyone had come across this before or indeed have a fix?

Have a 13" MacBook Pro mid 2010, will not power on, have tried with a battery from a 15" model with confirmed working battery but still no life so can rule or bad battery? (Unless not compatible?)

The only other information I have is that from what I can see after investigating the water damage indicators there is no obvious sign of water damage.

The confirmed working mag adapter does not light up at all, not green, yellow, just off when connected, tried with battery disconnected and connected, any ideas?

Thanks in advance for any help offered

 

[Sheridansystems]

Found damaged smd

The problem you have could be anything. You won't know until you test via schematic - you'll need to weed your way through a google search to acquire the relevant files. The schematic will give you the needed voltage and component value/tolerance info. However you have to be lucky that the problem is something you can diagnose with the tools you have available. Some components need an oscilloscope etc for testing. Caps really need a specific tester also. I was fortunate that I was able to diagnose to the fault with a basic multimeter. You have the problem also of testing resistors 'in circuit'. I think your next step should be getting the schematic for your board along with board view. Then spend days, as I did learning your way around. It may feel like a chore but what you learn from this you will carry on this experience to other logic boards. I have just completed my 3rd logic board component repair and I'm streets ahead of where I was with the first one. What I have found is that unibody logic boards are surprisingly similar in their layout, even if there are 30 something different revisions. YouTube is a good place to look for mainboard diagnostics too. Good luck with it.

First of all, Thank you Leehs for your help, there is very limited information on component end replacement on the net, Or it's so buried it's just hard to dig up. Plus any banter of the subject at hand always produces a direction. Case in point.
So far I found damaged smd's on two 820-2836-b see pics attached. The first chimes, and seems to post with no video, upon further inspection there are connections damaged on the video connector and two smd's, I believe the damaged smd's are in the video circuit? And can I replace them?
Can anyone confirm this?
The second logic board shows very little sign of life. I can only get a high speed fan with no video using the SMC reset. On closer inspection I found this broken smd. I'm not sure if it's in the power circuit. I do not see a soldered connection, most likely underneath. Is this part replaceable? Are any of these pieces replaceable?
Can anyone confirm this?
I am new to component replacing but not to computers. Anyone recall punch cards? I have a Ayoue 9070 and 968a+ at present Sperry multimeter plus hundreds of dollars of small tools. But These Apple systems will determine if I purchase a IR 6000 yet? to reflow and repair the smd's or BGA's in the future. Would a decent IR rework station be helpful in this field? Or do you get along with a good iron and heat gun?
Thanks

Not able to post multiple images. I will try again later, I put just the pic of the part with no connectors showing.

 

[nicoar10]

Hi guys!

Please check my issue, you can help me to fix it!

https://forums.macrumors.com/showthread.php?p=18146427#post18146427

 

[Dadioh]

Hi,
This 2009 MBP 13 works perfect after a spill and clean up.
all except it's not charging or seeing the battery. Smc reset, pram reset, known good battery, known good dc adapter. Battery test button shows no lites.
Checking a comparison board I noticed these two smd in the picture Reading 0v.
6th solder tab from ram chip on battery connector reads 0v.

Before I desolder and replace these two, can anyone let me know what there values should be? And if they are part of the charging system?
Thanks in advance

Those two capacitors are on the 5V power to the USB ports. I assume your USB ports are dead but unrelated to non-charging issue.

The center pin on the battery connector is battery detection and it should read 0V as you have measured. However, measure the pins to either side of that. Those are the i2c bus pins for the battery and should read around 3V. If not then you are not getting communications between the battery and the SMC.

 

[bitsnpcs]

Hi guys and what an excellent thread, thanks so much for your efforts helping others already.

Ok so I wonder if anyone had come across this before or indeed have a fix?

Have a 13" MacBook Pro mid 2010, will not power on, have tried with a battery from a 15" model with confirmed working battery but still no life so can rule or bad battery? (Unless not compatible?)

The only other information I have is that from what I can see after investigating the water damage indicators there is no obvious sign of water damage.

The confirmed working mag adapter does not light up at all, not green, yellow, just off when connected, tried with battery disconnected and connected, any ideas?

Thanks in advance for any help offered

Anybody any ideas on this?

 

[Dadioh]

Hi guys and what an excellent thread, thanks so much for your efforts helping others already.

Ok so I wonder if anyone had come across this before or indeed have a fix?

Have a 13" MacBook Pro mid 2010, will not power on, have tried with a battery from a 15" model with confirmed working battery but still no life so can rule or bad battery? (Unless not compatible?)

The only other information I have is that from what I can see after investigating the water damage indicators there is no obvious sign of water damage.

The confirmed working mag adapter does not light up at all, not green, yellow, just off when connected, tried with battery disconnected and connected, any ideas?

Thanks in advance for any help offered

If there is no light at all on the adapter then check to see if you have 3.4V on G3hot. Easiest place to check that is on one of the power up jumper pins near the keyboard connector. Pin locations are identified somewhere in this thread.

 

[davis12]

MBP 13" early 11 - liquid - weak green led - no power

I get measures on F6905, im getting something on U6990 only with battery connected what make me think that something is wrong with D6905 which i can't locate on board, can anybody post a pic. of it?
Also no G3Hot v with adapter only bat. gives 00.1.
mbp 13" early 11 A1278
a boardview for this model will be greatly appreciate.

Thanks guys!

 

[Dadioh]

I get measures on F6905, im getting something on U6990 only with battery connected what make me think that something is wrong with D6905 which i can't locate on board, can anybody post a pic. of it?
Also no G3Hot v with adapter only bat. gives 00.1.
mbp 13" early 11 A1278
a boardview for this model will be greatly appreciate.

Thanks guys!

The schematic/boardview that I have for 2011 MBP13 shows that diode as D6990 rather than D6905. See below. Hopefully your layout is the same.

 

[davis12]

The schematic/boardview that I have for 2011 MBP13 shows that diode as D6990 rather than D6905. See below. Hopefully your layout is the same.

Thanks Dadioh,
yes that is the same board, and im getting 16.5 on the D6990 so all good there, but i dont think the damage is under the board, the water only spilled on the top of the board and this component (se pic.) got most of the liquid but i dont know what it is and what it supposed to read.

 

[Dadioh]

Thanks Dadioh,
yes that is the same board, and im getting 16.5 on the D6990 so all good there, but i dont think the damage is under the board, the water only spilled on the top of the board and this component (se pic.) got most of the liquid but i dont know what it is and what it supposed to read.
View attachment 441869

That is the output inductor from the G3Hot supply. It should read 3.4V on both sides.

 

[davis12]

That is the output inductor from the G3Hot supply. It should read 3.4V on both sides.

Should it read 3.4V also when its only connected to DC without battery? cause it doesn't, no reads there..

 

[Dadioh]

Should it read 3.4V also when its only connected to DC without battery? cause it doesn't, no reads there..

It should always be 3.4v if any power is connected. The diode OR that feeds it must be bad. It allows through MagSafe 18v OR battery 12V to the G3Hot supply.

 

[fouroaks]

I am new and this is a great thread . I hope someone can help. I have a A1342 2010 white Unibody logic board # 820-2877-B. This had a little liquid damage around the fan I already cleaned the board with 91% alcohol. I do get a solid green light with the mag charger but will not turn on no fan dead and will not charge. I tried the bypass with pads no luck the 1 pad gets 3.37V the fuse buy the mag outlet gets 12.2V on both sides. Now what would be the best course of action. Thanks

 

[Dadioh]

I am new and this is a great thread . I hope someone can help. I have a A1342 2010 white Unibody logic board # 820-2877-B. This had a little liquid damage around the fan I already cleaned the board with 91% alcohol. I do get a solid green light with the mag charger but will not turn on no fan dead and will not charge. I tried the bypass with pads no luck the 1 pad gets 3.37V the fuse buy the mag outlet gets 12.2V on both sides. Now what would be the best course of action. Thanks

The fact that it will not charge suggests that the charger circuit is bad. Most Macbooks in that vintage used the ISL6259 device. You need to check pin 14 to see if it is putting out 3V. That is the Charger OK signal to the SMC. If it is 0V then you need to troubleshoot the charger circuit. If it is 3V but you still do not get an orange charge LED then it may be one of the devices between that signal and the middle pin of the Magsafe.

 

[fouroaks]

The fact that it will not charge suggests that the charger circuit is bad. Most Macbooks in that vintage used the ISL6259 device. You need to check pin 14 to see if it is putting out 3V. That is the Charger OK signal to the SMC. If it is 0V then you need to troubleshoot the charger circuit. If it is 3V but you still do not get an orange charge LED then it may be one of the devices between that signal and the middle pin of the Magsafe.

I am going to check this tomorrow.

Thank You

 

[davis12]

It should always be 3.4v if any power is connected. The diode OR that feeds it must be bad. It allows through MagSafe 18v OR battery 12V to the G3Hot supply.

Thanks Dadioh,
I will need to replace it and hope that thats the bastard..

btw..other case, MBA A1370 2011, getting Error on ASD 1C0R CPUVcore_VTT (Current) sensor rail 0, and also th1H i/o board, though tested with to different I/O boards and the same error.
Did you ever experienced with those errors? are they repairable?

 

[Dadioh]

Thanks Dadioh,
I will need to replace it and hope that thats the bastard..

btw..other case, MBA A1370 2011, getting Error on ASD 1C0R CPUVcore_VTT (Current) sensor rail 0, and also th1H i/o board, though tested with to different I/O boards and the same error.
Did you ever experienced with those errors? are they repairable?

I am not too experienced with the Airs but I do know that there are 2 cables that connect from the IO board to the main logic board. The primary power is through the heavier gauge wires but there is a flex cable that carries all of the signalling. I would examine that cable closely and, if possible, try another one.

 

[macrepair]

Hi everyone. Great to see so much progress in this forum!

I have a MacBook Pro A1278 2010 model that has never had any spillages but has a "not charging" fault. Everything works perfect except for not charging even though battery is being detected. I have tried with new battery and new MagSafe and also tried SMC resets but still MagSafe light stays green and battery will not charge.

Just wondering what component could be faulty on the logic board that would prevent battery from charging and if there is common IC that does tend to fail on the charging circuit?

Any help appreciated thanks! I have done searches in this forum but can't find anyone having a similar fault.

 

[Dadioh]

Hi everyone. Great to see so much progress in this forum!

I have a MacBook Pro A1278 2010 model that has never had any spillages but has a "not charging" fault. Everything works perfect except for not charging even though battery is being detected. I have tried with new battery and new MagSafe and also tried SMC resets but still MagSafe light stays green and battery will not charge.

Just wondering what component could be faulty on the logic board that would prevent battery from charging and if there is common IC that does tend to fail on the charging circuit?

Any help appreciated thanks! I have done searches in this forum but can't find anyone having a similar fault.

Welcome to the thread.

Since you say it detects the battery then the communications between the SMC and the controller in the battery are working. That is a common fault where that communications bus is down. However this is not your case. Your focus would be on the ISL6258 charging circuit. You need to start by checking pin 14 to see if it is 3V. That is the signal from the ISL6258 to the SMC that everything is ok. If it is 0V then you have an issue with the charging circuit.

 

[fouroaks]

The fact that it will not charge suggests that the charger circuit is bad. Most Macbooks in that vintage used the ISL6259 device. You need to check pin 14 to see if it is putting out 3V. That is the Charger OK signal to the SMC. If it is 0V then you need to troubleshoot the charger circuit. If it is 3V but you still do not get an orange charge LED then it may be one of the devices between that signal and the middle pin of the Magsafe.

I did check this and I am getting 0.0V.

Thanks

 

[MKk0456]

Water Damagd MCP A1278

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

 

[macrepair]

Welcome to the thread.

Since you say it detects the battery then the communications between the SMC and the controller in the battery are working. That is a common fault where that communications bus is down. However this is not your case. Your focus would be on the ISL6258 charging circuit. You need to start by checking pin 14 to see if it is 3V. That is the signal from the ISL6258 to the SMC that everything is ok. If it is 0V then you have an issue with the charging circuit.

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?

 

[macrepair]

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?

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

 

[MKk0456]

MbP A1278 Water damaged

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

Hey dude can you throw some light on his issue?

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 at a high speed & the beep sound is produced continuously along with the sleep light indicator, the screen 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 Model A1278 early 2011

 

[macrepair]

Hey dude can you throw some light on his issue?

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 at a high speed & the beep sound is produced continuously along with the sleep light indicator, the screen 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 Model A1278 early 2011

Best thing is to disassemble laptop as soon as possible and make sure battery is disconnected. Clean the logic board thoroughly with isopropyl alcohol and toothbrush. Also make sure LVDS connectors are both clean and also trackpad circuit board. After allowing to dry fully, test with just MagSafe connected to external monitor. If this displays correctly then test with laptop screen. If there is still problems on display then it's possible the LCD is damaged or circuit that controls LCD. Take some photos as well..