SMC Issue on MBP 13 - Hardware Troubleshooting Guide

[Musicsoul78]

I am preety shure that's it mine is dead any suggestions Where is the fuse located on this board it is different than the macbook pro unibody boards I've seen. I'm getting a switching flicker on my magsafe prob a bad fet. I guess this means if my g3hot is 0v this is preety bad?

oh dear

ok see the fuse next to the battery connector .... that should be open on the other side there is one too... test continuity

do you have spare dc in board to test?

has there been any liquid damage?

im lucky mine is just keyboard and keyboard connector related

 

[macattack600]

oh dear

ok see the fuse next to the battery connector .... that should be open on the other side there is one too... test continuity

do you have spare dc in board to test?

has there been any liquid damage?

im lucky mine is just keyboard and keyboard connector related

sorry I went back and redit my last post I do get 3.4v read and then let me know I do have a spare but it is off a a1181 regular macbook it does the same thing . Yes It is water damaged I've cleaned very well though.

 

[Musicsoul78]

sorry I went back and redit my last post I do get 3.4v read and then let me know I do have a spare but it is off a a1181 regular macbook it does the same thing . Yes It is water damaged I've cleaned very well though.

you cant use a1181 i know they fit but it wont read right with smc!

i have a1181 too and mine didnt work right!

buy some off ebay???

 

[macelek01]

My MB13W schematic is quite different from yours so I can't tell you what your Q7030 is doing (not in my schematic). See the attached schematic, yours should be similar and the voltages should also be similar if magsafe is plugged in. If the lower FET GATE signal (LGATE) is not pulsing, then the FET or the ISL6259 maybe bad.

Yesterday I tested and measured the logic board. About five for ten times, when I contacted the magsafe adapter to the motherboard, the voltage of the PPBUS_G3H was right. The voltage was 12,6V, but about five for ten times it changed continuously. Therefore I think the ISL6259 and the FETs aren't bad, because sometimes the PPBUS_G3H works properly. But in this case the logic board doesn't turn on and doesn't work from the full charged battery.
I think the problem could be on a higher lever. Do you have any idea?

I attached my schematic.

Thank's!

 

[Musicsoul78]

Yesterday I tested and measured the logic board. About five for ten times, when I contacted the magsafe adapter to the motherboard, the voltage of the PPBUS_G3H was right. The voltage was 12,6V, but about five for ten times it changed continuously. Therefore I think the ISL6259 and the FETs aren't bad, because sometimes the PPBUS_G3H works properly. But in this case the logic board doesn't turn on and doesn't work from the full charged battery.
I think the problem could be on a higher lever. Do you have any idea?

I attached my schematic.

Thank's!

what about the source its self then? what mag are using 60 85 40 originals or replacements. granted the power should still work from battery but its worth a try.

i always carry multiple chargers and dc-in boards for testing purposes

 

[macelek01]

what about the source its self then? what mag are using 60 85 40 originals or replacements. granted the power should still work from battery but its worth a try.

i always carry multiple chargers and dc-in boards for testing purposes

Hello Musicsoul78,

Thank's your reply. I tested the logic board with more original 60 W apple magsafes. The DC board is ok.

 

[Musicsoul78]

Hello Musicsoul78,

Thank's your reply. I tested the logic board with more original 60 W apple magsafes. The DC board is ok.

what if the power is being drained before it reaches g3hot in bursts ... ie corrosion on traces faulty switching diode the pulsing suggests it... is it being grounded properly?

i have no idea? i did see something like this back on this thread i think you need to go back and have a looksy

 

[mactechsupport]

A1370 won't start...

Hello, I am currently working on a liquid damaged 2011 A1370. The symptoms are as follows,

Will not turn on
Green light on magsafe
Will not charge battery

I opened the unit and cleaned the small section on the logic board that had a sign of liquid contact. Only 1 liquid sensor was tripped on the logic board in that area. All others are intact as well as the ones on the battery. I replaced the dc in board with a spare with no change in symptoms. Does anyone know the location of any pins or pads that can be used to bypass the keyboard power button or smc circuit. Any help or schematic would be greatly appreciated.

 

[Musicsoul78]

Hello, I am currently working on a liquid damaged 2011 A1370. The symptoms are as follows,

Will not turn on
Green light on magsafe
Will not charge battery

I opened the unit and cleaned the small section on the logic board that had a sign of liquid contact. Only 1 liquid sensor was tripped on the logic board in that area. All others are intact as well as the ones on the battery. I replaced the dc in board with a spare with no change in symptoms. Does anyone know the location of any pins or pads that can be used to bypass the keyboard power button or smc circuit. Any help or schematic would be greatly appreciated.

get board view from here bro

http://www.im0575.com/apple-macbook-air-a1370-schematic-820-2796-k99.html


i could be wrong but i think its these 2

get a multimeter and place on continuity then place a probe on each pad.

good luck

 

[mactechsupport]

get board view from here bro

http://www.im0575.com/apple-macbook-air-a1370-schematic-820-2796-k99.html


i could be wrong but i think its these 2

Image

get a multimeter and place on continuity then place a probe on each pad.

good luck

Thanks for the help... My board is different in the location of the pads but I did find a couple of pads in a few locations on the board. However none of them show 3.4v so I guess there must be something wrong elsewhere on the board. In my pic the green components next to the arrows I believe are fuses, on one of these I do not have any voltage. The round device on the bottom outputs 3.4v for the g3hot...? Can I jump a pin on the cable which goes to the trackpad or keyboard to try to start it?

:rolleyes:[IMG]http://i1300.photobucket.com/albums/ag89/mactechsupport/a1370/a1370fuses.jpg[/IMG]

Thank you for your help.

 

[foxontherun]

MBP13 mid 2010 A1278 K6 - no boot - no charge; bright green Macsave

hello to all from Frankfurt - Germany.

First of all - I hope for all guys at the eastcoast, Storm 'Sandy' didn't affected you and your families personally!

Follow the sentence "Don't ask what the MacRumors Forum can do for you - ask what you can do for the MacRumors Forum!" - I will document my MBP 13 mid 2010 errors.

The MBP13 has bright green light on the Magsave. No boot, no boot by pass over SMC Control, no battery charge, no 3.42_High start by bridging contacts left near the keyboard.

Voltages on G3Hot 3.42, DCIN_CONN 18.5V, 5V at pin 19 VDD_ 20 VDDF on U7000 (ISL6259(A));~3,3V on Pin 14 CHRG ACOK (U7000); 18,5 V at the Drain on Q7030 (RJK0332) but --- only 1.6V at Gate and effluent 1.6 V at the Source of the Q7030. So the Gate and the Source has the same voltages and no regulations will be effected.

The Source will be regulated from the U7000 PIN 24 UGATE and just have 12,5V (when other signals/voltages ok) to flow to the System PPBUS_G3H and to charge the Battery by PPVBAT_G3H_CHGR_REG by Q7055 (SI7137).

Next step was to measure the resistance between Gate/Source of the Q7030 (RJK0332). Short curcuit! So far - so bad! Two possible causes: 1st. - short of the Q7030 (Gate/Source) or --- 2nd. short between Pin 23 PHASE and 24_CHRG_UGATE.

Now I have to order the RJK0332 and the RJK0305 (only for security reasons) and the ISL6259. The Solder out of the Q7030 will be not dramatic, but to solder out/in the U7000 this will be a challange! So I start to pray that the Q7030 is the bad causes.

Has anybody in the Forum experiences about this error and/or tips to desolder the U7000 by a hotair soldering station? I sold a new one, but my experiences are like a rookie.

Also is it hard to find an store to order the technical parts for the german/european market!?!? -- I will open a Webshop to sell these parts specially für the Apple Macbooks. The post of my Webshop Adress will follow ... next time.

Also I will deliver a service to Protect the Macbook's from waterspill! It is unbelievable how many macusers spill fluids over there Macbook's - here in Germany we prefer to drinking the stuff ...!?!

Other Question: Has anybody of this friendly forum a 'board view' of the mid 2010 A1278 K6 (820-2879) !?

Thanks in advanced!

best regards and stay tuned on this professionall Forum - thanx to Dadioh, macrepair, cmdrdata and ... all others for her helpful inputs!

foxontherun

 

[cmdrdata]

hello to all from Frankfurt - Germany.

First of all - I hope for all guys at the eastcoast, Storm 'Sandy' didn't affected you and your families personally!

Follow the sentence "Don't ask what the MacRumors Forum can do for you - ask what you can do for the MacRumors Forum!" - I will document my MBP 13 mid 2010 errors.

The MBP13 has bright green light on the Magsave. No boot, no boot by pass over SMC Control, no battery charge, no 3.42_High start by bridging contacts left near the keyboard.

Voltages on G3Hot 3.42, DCIN_CONN 18.5V, 5V at pin 19 VDD_ 20 VDDF on U7000 (ISL6259(A));~3,3V on Pin 14 CHRG ACOK (U7000); 18,5 V at the Drain on Q7030 (RJK0332) but --- only 1.6V at Gate and effluent 1.6 V at the Source of the Q7030. So the Gate and the Source has the same voltages and no regulations will be effected.

The Source will be regulated from the U7000 PIN 24 UGATE and just have 12,5V (when other signals/voltages ok) to flow to the System PPBUS_G3H and to charge the Battery by PPVBAT_G3H_CHGR_REG by Q7055 (SI7137).

Next step was to measure the resistance between Gate/Source of the Q7030 (RJK0332). Short curcuit! So far - so bad! Two possible causes: 1st. - short of the Q7030 (Gate/Source) or --- 2nd. short between Pin 23 PHASE and 24_CHRG_UGATE.

Now I have to order the RJK0332 and the RJK0305 (only for security reasons) and the ISL6259. The Solder out of the Q7030 will be not dramatic, but to solder out/in the U7000 this will be a challange! So I start to pray that the Q7030 is the bad causes.

Has anybody in the Forum experiences about this error and/or tips to desolder the U7000 by a hotair soldering station? I sold a new one, but my experiences are like a rookie.

Also is it hard to find an store to order the technical parts for the german/european market!?!? -- I will open a Webshop to sell these parts specially für the Apple Macbooks. The post of my Webshop Adress will follow ... next time.

Also I will deliver a service to Protect the Macbook's from waterspill! It is unbelievable how many macusers spill fluids over there Macbook's - here in Germany we prefer to drinking the stuff ...!?!

Other Question: Has anybody of this friendly forum a 'board view' of the mid 2010 A1278 K6 (820-2879) !?

Thanks in advanced!

best regards and stay tuned on this professionall Forum - thanx to Dadioh, macrepair, cmdrdata and ... all others for her helpful inputs!

foxontherun

Yes it seemed that GS voltages at Q7030 is bad. They should not be the same. Also check Q7035 voltages. From your description, it could also be bad/shorted. There will no charging activity until PPBUS_G3H can get to nominal 12v level, thus the reason for solid green on the magsafe. By the way, if you have magsafe LED green or orange, it is usually indicative that G3HOT is working. Exceptions are bad DCIN board or magsafe, bad SCL/SDA pull-up resistors or connection problem.

 

[foxontherun]

Yes it seemed that GS voltages at Q7030 is bad. They should not be the same. Also check Q7035 voltages. From your description, it could also be bad/shorted. There will no charging activity until PPBUS_G3H can get to nominal 12v level, thus the reason for solid green on the magsafe. By the way, if you have magsafe LED green or orange, it is usually indicative that G3HOT is working. Exceptions are bad DCIN board or magsafe, bad SCL/SDA pull-up resistors or connection problem.

hello cmdrdata, thanks for your input. The magsave LED shines bright and green. No orange light I have seen since I was work with defective MBP13's. By the way, DCIN board and the Magsave (orig. Apple) are new. The Q7035 was also in my assumption, but the Gate to Source has a high resistance. Also the Drain to Source and to Gate. In the detailed document of the ISL6259 the Pin24_UGATE and the Pin23_PHASE are regulated by the same regulator circuit inside of the ISL. So a short in this circuit looks like more technologic possible, I guess, when the Q7030 is not the troublemaker.

I have a second MBP mid2010 with an other power/charging error. (very dim green light). But first I will fix this MBP13, so the forum support will help to bring the Apple up and running.

regards

 

[frodo837]

A1369 backlight

Hi I have MBA A1369 (late 2010) Initially i have problem with vertical lines on LCD. I supposed it's LVDS cable,buyone at ebay, during replacing looks unfortunately I short something and now I didn't see backlight.
Could somebody advice where is backlight fuse or provide part LED driver schematic (Does it placed on logic board, or at LCD?)?

 

[cmdrdata]

hello cmdrdata, thanks for your input. The magsave LED shines bright and green. No orange light I have seen since I was work with defective MBP13's. By the way, DCIN board and the Magsave (orig. Apple) are new. The Q7035 was also in my assumption, but the Gate to Source has a high resistance. Also the Drain to Source and to Gate. In the detailed document of the ISL6259 the Pin24_UGATE and the Pin23_PHASE are regulated by the same regulator circuit inside of the ISL. So a short in this circuit looks like more technologic possible, I guess, when the Q7030 is not the troublemaker.

I have a second MBP mid2010 with an other power/charging error. (very dim green light). But first I will fix this MBP13, so the forum support will help to bring the Apple up and running.

regards

The issue of NOT getting PPBUS_G3H to generate 12v has been mentioned by many people here including U-234 who asked that question privately. I am responding here so others can benefit too. Here's a hand drawing of how it is SUPPOSED to work. So far, most Macs I saw in this forum have similar design, power wise. Basically, the raw DC from the magsafe (16-18v) is chopped by the two FET shown in the drawing so that they are alternately turning ON and OFF. If one looked at the junction of those two FET with the choke disconnected, it will looked like a square wave peaking at raw DCIN voltage (frequency at approx 400kHz), however, when the choke/resistor/capacitor is present, the square wave is then smoothed/filtered out to become DC voltage. The resultant voltage level is controlled by the ISL6258 or ISL6259 as it monitors the feedback signal and it then modifies the duty cycle (how long to turn the FETs on and off and thus you get 12v. If you are using just a voltmeter to measure the UGATE/LGATE signals you will not be able to see these pulses. If you are lucky enough to have an oscilloscope, you will be able to verify these pulses and its relationship to each other. Please note that if the system is operating on battery power only, the FETs are not even turned on since the ISL is not getting power from the magsafe. PPBUS-G3H is like the main artery in your body, it provides the main power to the system, but there are many smaller veins (other lower level voltages) that must also be present before the system can power up and boot. Oh, the sketch is a bit wrong the RC should be connected to the left of the choke, not the right side. Enjoy.

 

[foxontherun]

The issue of NOT getting PPBUS_G3H to generate 12v has been mentioned by many people here including U-234 who asked that question privately. I am responding here so others can benefit too. Here's a hand drawing of how it is SUPPOSED to work. So far, most Macs I saw in this forum have similar design, power wise. Basically, the raw DC from the magsafe (16-18v) is chopped by the two FET shown in the drawing so that they are alternately turning ON and OFF. If one looked at the junction of those two FET with the choke disconnected, it will looked like a square wave peaking at raw DCIN voltage (frequency at approx 400kHz), however, when the choke/resistor/capacitor is present, the square wave is then smoothed/filtered out to become DC voltage. The resultant voltage level is controlled by the ISL6258 or ISL6259 as it monitors the feedback signal and it then modifies the duty cycle (how long to turn the FETs on and off and thus you get 12v. If you are using just a voltmeter to measure the UGATE/LGATE signals you will not be able to see these pulses. If you are lucky enough to have an oscilloscope, you will be able to verify these pulses and its relationship to each other. Please note that if the system is operating on battery power only, the FETs are not even turned on since the ISL is not getting power from the magsafe. PPBUS-G3H is like the main artery in your body, it provides the main power to the system, but there are many smaller veins (other lower level voltages) that must also be present before the system can power up and boot. Oh, the sketch is a bit wrong the RC should be connected to the left of the choke, not the right side. Enjoy.

Thanks a lot for the detailed explanation! - My fault to saw these curcuit and the generation of the 12,5V to simple. I'm on the wrong path. I kind the regulation of the 12,5V PPBUS_G3H was regulated by the Voltage at the Gate of the FET's.

Can anybody tell measuringme the resistance between Source/Gate of the Q7030? or is it normal to measure a short in both ways?

 

[Dadioh]

Thanks a lot for the detailed explanation! - My fault to saw these curcuit and the generation of the 12,5V to simple. I'm on the wrong path. I kind the regulation of the 12,5V PPBUS_G3H was regulated by the Voltage at the Gate of the FET's.

Can anybody tell measuringme the resistance between Source/Gate of the Q7030? or is it normal to measure a short in both ways?

Measuring a short between gate and source is not right. A couple of things to consider however...

1) Since the FET's are a lot easier to remove and replace than the charger ISL6258/6259 I usually pull off the FET and see if the low resistance is still present. More often than not it is the charger device that has gone bad rather than the FET but by removing the FET you can confirm this.

2) If the board has been recently powered on then you can get erroneous low resistance measurements across the FET's. Because a resistance meter applies a voltage and then measures the subsequent current to calculate the resistance, it can get confused if there is any voltage left in the circuit. Unfortunately the 22uF cap on the output can hold a charge for some time affecting the measurement. Either wait long enough for it to discharge naturally or discharge it yourself, ideally using a resistor to prevent large current flow through the cap.

 

[macattack600]

shorted ISL6258 now toast? a1278 non pro

G3hot good fuse good later shorted ISL6258 charging circuit I saw the battery indicator flash with no battery go back and forth went haywire with no battery in it now it won't come on think that's toast too.
Area around ISL6258 is very hot.


I see I can replace ISL6258 found on ebay but how much more does anyone think i've damaged to much to make it too much too fix. Any pointers in my next step ?

 

[torontomac]

efi firmware

anyone figure out how to reload the firmware
just got another board with the same problem now have 2 boards
13 i5 2.3
15 i7 2.2
both with bad firmware and have the continuous 9 beeps and I dont have spare boards to pull spi boot roms from, anyway to reprogram them or does anybody have dumps?

 

[tkaz]

Hi all,

I picked up a late 2011 2.4GHz i5 MacBook Pro (MD313LL/A) that had minor water damage. I am able to boot it up using a charged battery, but the computer won't recognize the charger.

I swapped in a known good Magsafe board, same results (no charge)

Is there an upstream fuse that may have blown on the board that would affect the charging circuit, or would this be a chip level repair?

Any help is appreciated, I can provide photos if required.

 

[G35C]

Wanted to see if anyone has some thoughts on this situation. I picked up a badly liquid damaged unit whose logic board was completely unrecoverable and in fact the liquid had even seeped into the display itself and ruined the LED panel. I replaced the logic board with one that I had already fixed and everything seemed fine except for the fact that as soon as I connected the magsafe the unit would boot up, not waiting for me to press the power button. Also, when selecting "shut down" from the apple menu it would shut down but then immediately restart.

So I put a second logic board in there and the behavior remains suggesting it is not the logic board. I thought maybe the power switch is a little intermittent so I took the cover off the back and inspected it. There was corrosion on the backplate that covers the switch but the switch itself seems like a sealed unit and is part of the keyboard itself so repair doesn't seem like an option.

So watcha think? Keyboard/power switch replacement? The only thing I could think of was intermittent power switch. Or is there some other possibility I am overlooking? Pulling the keyboard is a major PITA given the 4000 tiny screws required

Did you ever figure this one out? I have a mid2010 MBP 15" that is doing the same thing. As soon as you plug in the Magsafe, the laptop turns on!!

 

[rickAC]

Thanks.

Before I tell how it goes with my mbp I would like to ask you the following:
Do I need to have LCD connected to LB to be able to measure voltages at for. ex. LCD connector? I ask because all those lines that comes from U1400 MCP79 (GPU) like LVDS_IG_PANEL_PWR, LVDS_IG_A_CLK_N, LVDS_IG_A_CLK_P
and all data lines are 0v when lcd is not connected and lb is booted.

This mbp is really strange. I have checked and measured every possible lead from/ to LCD connector.
At last I removed WLED driver and it makes no difference. Mbp shuts down with lcd connected. Without LCD it seems to boot ok, chime is heard).
Then it led me to other rails. PP3V3_LCDVDD_SW_F (pin 2&3 in LCD connector) 0v. It comes from U9000 > L9004.
LVDS_IG_PANEL_PWR (U9000) is 0v while vin_1 and vin_2 are 3,3v but resistance here is only 180ohm. It comes from U7200 (PP3V3_S5_REG). Is 180ohm normal or could it be the why mbp shuts down?

regards

I found out that PP3V3_LCDVDD_SW_F line is causing the mbp to shut down by removing L9004. By removing it the mbp runs but nothing comes on display. It is not shorted. So the question is can something be done about this? If backlight IC is bad, can it be the indirect cause?
And I thought about LCD. I am not sure if those two lcd I have are 100% for my mbp 13" 2009. With other words are 2009 and 2010 lcd's compatible?

with kind regards

 

[Dadioh]

Did you ever figure this one out? I have a mid2010 MBP 15" that is doing the same thing. As soon as you plug in the Magsafe, the laptop turns on!!

Turned out that it was the wifi card in the hinge. Replaced it and this behavior stopped. Maybe something to do with "wake on LAN" was all I could figure out. The wifi card is in the garbage and the new one is working happily.

 

[U-234]

Hi all,

I picked up a late 2011 2.4GHz i5 MacBook Pro (MD313LL/A) that had minor water damage. I am able to boot it up using a charged battery, but the computer won't recognize the charger.

I swapped in a known good Magsafe board, same results (no charge)

Is there an upstream fuse that may have blown on the board that would affect the charging circuit, or would this be a chip level repair?

Any help is appreciated, I can provide photos if required.

I'm having similar problem after restoring some of the voltages to normal.

Early 2011 2.3GHz i5 13"

The unit powers on the battery only, Megsafe solid green (my PPBus_G3H is only 4V)

The first thing to check is what are you getting on PPBus_G3H with DCIN only, it should be 12V.

 

[Musicsoul78]

Hi I have MBA A1369 (late 2010) Initially i have problem with vertical lines on LCD. I supposed it's LVDS cable,buyone at ebay, during replacing looks unfortunately I short something and now I didn't see backlight.
Could somebody advice where is backlight fuse or provide part LED driver schematic (Does it placed on logic board, or at LCD?)?

here you go follow these pic to show you location of 402 fuse
mac sue battery and ,magsafe is disconnected