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SMC Issue on MBP 13 - Hardware Troubleshooting Guide
- Thread starter Dadioh
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help
right so i have a wierd one
wont react to the battery light indicator.ect or run of battery. u7000 is fine. 12v is fine. and g3hot is fine on the batter all the way to the smc.
Im dead confused. maybe im overlooking a part that could be faulty...? any ideas guys
right so i have a wierd one
wont react to the battery light indicator.ect or run of battery. u7000 is fine. 12v is fine. and g3hot is fine on the batter all the way to the smc.
Im dead confused. maybe im overlooking a part that could be faulty...? any ideas guys
tnx again for reply. since u7000 too is removed the problem is in Q7030 or q7035. ill try this 2 component. tnx again
edit: checked q7030 and q7035 pins and 4 is ok on both but 1-2-3-5 are all shorted.
If you look at the diagram i attached in my previous post, you will notice that on both Q7030 and Q7035 there is a diode that links pin 5 to 1, 2 and 3. This diode is to prevent the voltage from pin 5 going directly to pins 1,2,and 3. The voltage flow is controlled by a signal coming from U7000 to pin 4 and when the switch closes, the voltage from pin 5 flows through to pins 1,2 and 3. Because you said that 1,2,3,& 5 are all shorted, that means the diode inside each component has blown and caused the short. If you remove both components, i think you will find the short has gone
I can confirm that it is a 22 ohm resistor and the resistor is not being used as a fuse. If you try to put a fuse in there or just short it, not only could you do damaged to the dc board but also to the logic board as well. Is that a chance your willing to take?, i know i wouldn't.
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You haven't exactly provide much info about the model of the machine. Please identify the logic board number, starting with 820- and we can go from there.
What Laptech stated is quite true. I just want to add something. When you measure a MOSFET you can easily open it - when using your millimetre in mode Diode and connect the negative to the Source (1,2,3) and the positive to the Gate (4). When the MOSFET is open, you can measure almost zero between the Source (1,2,3) and the Drain (5). I’d first shorten the Source (1,2,3) and the Gate (4) – just to make sure the MOSFET is closed – and then check the Source (1,2,3) – Drain (5) without touching anymore the Gate.
Good luck!
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Constant beeping with/without RAM. No Post
Thank You guys for a Great Post. Would like to check with community if someone experienced the issue below. Searched, but did not find any answers. I have the same issue on the same 2010 13" MacBook Pro and have no idea where to look for solution. Maybe someone has an idea. Thanks a lot!
Thank You guys for a Great Post. Would like to check with community if someone experienced the issue below. Searched, but did not find any answers. I have the same issue on the same 2010 13" MacBook Pro and have no idea where to look for solution. Maybe someone has an idea. Thanks a lot!
tnx, i tried that but results was the same. so i removed Q7035 and short on coil pins as gone. now on q7035 i have only short with pin 1.2.3 that should be gnd so that means q7035 is bad? 
chigwelldave
Way earlier in this thread you were working with a PPVCORE_S0_AXG issue on a 2915 board.
Did you ever resolve it?
Can you offer any insight into the function of PPVCORE_S0_AXG?
I am looking at this as a possible reason for post hang on a 2914.
Thanks
Way earlier in this thread you were working with a PPVCORE_S0_AXG issue on a 2915 board.
Did you ever resolve it?
Can you offer any insight into the function of PPVCORE_S0_AXG?
I am looking at this as a possible reason for post hang on a 2914.
Thanks
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Hi. Sorry its an 820-2936. Gets no BILL lights but has g3hot from the battery and will happly sit on a charged battery. Think its something to do with sm DC OK lines from the smc back to the charging circuit. But i didnt have time to fiddle last night.
tnx, i tried that but results was the same. so i removed Q7035 and short on coil pins as gone. now on q7035 i have only short with pin 1.2.3 that should be gnd so that means q7035 is bad?
As long as pins 1,2,3 AND 5 are not short on Q7035 then that part is ok. If you look at the diagram in my earlier post you will see that pins 1,2 and 3 are all connected to ground (GND), so what you are measuring is correct.
So, considering the short has now gone from the coil, you can safely say you have found the faulty part, Q7030, well done.
So I am clear on a few points, please reply back the state of these points
1 - Green LED is visible when ONLY magsafe is connected
2 - Charging LED is visible when magsafe AND battery are connected
3 - With only the magsafe connected (no battery fitted) does logic board power on, (fan spins) and maybe posts (Apple logo/folder icon displays on LCD screen)
4 - With only the battery connected (no magsafe) does the logic board power on (fan spins) and maybe posts (Apple logo/folder icon displays on LCD screen)
This is the basic beginning steps to determine where we start focusing our attention on.
I noticed you have titled the post 'constant beeping'. There is a situation where the SMC/Firmware becomes corrupt OR at some point the SMC/Firmware was being updated and a crash occurred during the update. When this occurs and you next try to power on the machine, you get constant beeping. There was a good site that gave a good listing of what all the different beep error codes was but i am unable to find it.
hoooah
tnx very much for the help. i have to order it from china and wait for 30-60 days to let it arrive
i just thought id answer your questions mate. althoght its sorted
1- Yes
2- Yes
3- Yes
4- No
Basically what happened is i noticed a lacking of G3hot via the battery before i initial posted here and thought id sorted the battery issue by replacing u6990 (g3hot reg). put it back together and the fault repeated itself. Out of ignorance i started poking around not realizing the handshake process between the SMC, U7000 and BIL.
BIL light had a fault, so even after a repaired G3hot it would not charge. however now when its removed it does charge fine.
lesson learnt. BIL's go bad, and cause allot of stress.
got hella confused after i replaced u6990 and it worked for a bit and after i rebuilt it it didnt.
but yeah. so in the end it was what i initially suspected, the U6990 regulator, but the fault was replicated straight after re assembling it, becuase of the BIL light
Hard Drive Schematic for Toshiba HDD2J63?
I searched through this forum to find a good place for this post but couldn't find good spot so I'm posting it here. I have a Toshiba MK3265GSXF HDD2J63 2.5 that is completely dead won't spin nothing. I took the PCB board out and it looks very simple compared to the bigger laptop logic boards. Now, If I had schematic I would have higher chances to fix it and get the exact part replacements.
As you know the PCB naming is generic like C, R, IC, D. Looks like the issue might be no power, so I was looking for a blown fuse (F) or diode (D) but couldn't find anything.
The only chip that looks like a fuse is a while small part labeled "E2" (please look at the attached picture)
The exact schematic for this model would be perfect but any 2.5 Toshiba Hard Drive schematic would be good as well. I can use it for a reference.
Thanks
I searched through this forum to find a good place for this post but couldn't find good spot so I'm posting it here. I have a Toshiba MK3265GSXF HDD2J63 2.5 that is completely dead won't spin nothing. I took the PCB board out and it looks very simple compared to the bigger laptop logic boards. Now, If I had schematic I would have higher chances to fix it and get the exact part replacements.
As you know the PCB naming is generic like C, R, IC, D. Looks like the issue might be no power, so I was looking for a blown fuse (F) or diode (D) but couldn't find anything.
The only chip that looks like a fuse is a while small part labeled "E2" (please look at the attached picture)
The exact schematic for this model would be perfect but any 2.5 Toshiba Hard Drive schematic would be good as well. I can use it for a reference.
Thanks
Attachments
I think they will be an Electrolytic capacitor. It has a + on the board for the positive end.
Barney
Barney
Maybe the drive motor is dead, but as far as the board goes, if it ends up not being really easy couldnt you just get one with bad data and a working board from the bay and swap out the boards
SMC Issue on MBP 13 - Hardware Troubleshooting Guide
Today the keyboard arrived and I replace, but no response when I try do a pram/smc reset
Need help with this board please.
Here is the pictures. May be when the keyboard and battery arrive I can do a smc/pram reset? But I believe it's not back work because the macbook doesn't start. Just the fan start and get a full speed in 30 sec.
https://www.dropbox.com/s/saoke8oh0xon8z5/Photo 25-02-14 06 09 00 PM.jpg
https://www.dropbox.com/s/xbnso21mge2lej8/Photo 25-02-14 06 08 54 PM.jpg
Today the keyboard arrived and I replace, but no response when I try do a pram/smc reset
Need help with this board please.
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hoooah
You should try this company Digikey. I get the bulk of my parts from them for fixing the apple boards
Please follow these steps that i quoted in another post and we can take things from there.
So I am clear on a few points, please reply back the state of these points
1 - Green LED is visible when ONLY magsafe is connected
2 - Charging LED is visible when magsafe AND battery are connected
3 - With only the magsafe connected (no battery fitted) does logic board power on, (fan spins) and maybe posts (Apple logo/folder icon displays on LCD screen)
4 - With only the battery connected (no magsafe) does the logic board power on (fan spins) and maybe posts (Apple logo/folder icon displays on LCD screen)
This is the basic beginning steps to determine where we start focusing our attention on.
Hi U234,
I agree with the other poster regarding replacing the board but, if that's not an option, you could try the chip data sheets. I find the final circuit is often very similar to the example application circuits described in the chip manufacturer's data. Have a look at that Texas Instruments chip IC301, it is connected to the power connector and has a couple of inductors nearby - it is probably the PSU and motor controller.
Regards,
Chigwelldave.
1- yes, logic board start and fan start spin and have max speed, NO apple logo or sounds.
2- yes, change to orange and fan start spin and get max speed.
3-yes, like the 1st answer.
4-no, nothing happend, Press the power and nothing, but I press the side button of battery state and give me a lights with the charge.
PS: battery new, and keyboard new.
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Hi triplelucky,
I gave up on that board at the time as I couldn't find a boardview, making troubleshooting very time consuming. I now have some time for it and so will look at it again, assuming I can find the boardview file now - I'll let you know if I get anywhere. This one was getting as far as initialising the ODD but immediately rebooting.
Regards,
Chigwelldave.
Chigwelldave
Ok thanks.
There seems to be little or no info on the function of PPVCORE_S0_AXG.
I was trying to figure out when in post it comes up and what should be there.
PS There is a guy on the bay that sells schematics with board view for $3.99. You can find them there by searching for laptop schematics and picking the one for $3.99.
Ok thanks.
There seems to be little or no info on the function of PPVCORE_S0_AXG.
I was trying to figure out when in post it comes up and what should be there.
PS There is a guy on the bay that sells schematics with board view for $3.99. You can find them there by searching for laptop schematics and picking the one for $3.99.