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MBPR 13 inch Late 2013 issues
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7 years 4 months ago #5652 by rav
MBPR 13 inch Late 2013 issues was created by rav
Hey all,
Machine is MBPR late 2013 A1502 EMC 2678, 2.4ghz I7 I think.
I'm unable to flash with EFIDL, I've looked at the pin out and using 4.0.2 clip.
Tried all 4 combinations with Magsafe and battery. No power, both in, just magsafe, and just battery.
EFIDL just scans, flashing the yellow light and does not detect. I've noticed the machine will always turn on after I take the clip off.
Any ideas?
Machine is MBPR late 2013 A1502 EMC 2678, 2.4ghz I7 I think.
I'm unable to flash with EFIDL, I've looked at the pin out and using 4.0.2 clip.
Tried all 4 combinations with Magsafe and battery. No power, both in, just magsafe, and just battery.
EFIDL just scans, flashing the yellow light and does not detect. I've noticed the machine will always turn on after I take the clip off.
Any ideas?
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7 years 4 months ago - 7 years 4 months ago #5653 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
EDITED.
try powering the MacBook on, then off, then attempt the read.
try powering the MacBook on, then off, then attempt the read.
Last edit: 7 years 4 months ago by reverendalc.
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7 years 4 months ago #5660 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
With the clip connected?
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7 years 4 months ago #5661 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
No, with the clip disconnected:
Perform SMC reset
Power cycle the MacBook
Then connect the clip, then power the efidL
Please share a photo of how the adapter is connected. Also, what is your board number?
Perform SMC reset
Power cycle the MacBook
Then connect the clip, then power the efidL
Please share a photo of how the adapter is connected. Also, what is your board number?
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7 years 4 months ago - 7 years 4 months ago #5664 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
Just did the SMC and power cycle (fan was spinning on max until i disconnected magsafe)
Still no luck
Board # C02408701SSFJYL1W I think
Still no luck
Board # C02408701SSFJYL1W I think
Last edit: 7 years 4 months ago by rav.
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7 years 4 months ago - 7 years 4 months ago #5666 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
you have your clip connected backwards. it needs to hang over the LCD hinge.
on this model, you must loosen some (or all) logic board screws to firmly connect the adapter
also i need the board model number not board serial. should be embossed under the SSD in 820-XXXXX format
on this model, you must loosen some (or all) logic board screws to firmly connect the adapter
also i need the board model number not board serial. should be embossed under the SSD in 820-XXXXX format
Last edit: 7 years 4 months ago by reverendalc.
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7 years 4 months ago - 7 years 4 months ago #5668 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
Thanks! According to EFIDL LED codes It was able to clear the EFI (slow green flash) on Magsafe and Battery, and with no battery but magsafe in.
However, I still get flashing file when booting to OS and password prompt with ALT boot. I have done SMC reset and power cycle. Although what is odd is I cannot
do a NVRAM reset for some reason, I hold the keys and the second chime never kicks in.
Did not see a 820-xxxxx under the SSD. will look under the board when I can
Edit: After some searching/googling I'm also unable to enter single user mode and reset nvram that way. Wondering if there is a way to mount this mac via thunderbolt cable to another mac and reset nvram from that one
However, I still get flashing file when booting to OS and password prompt with ALT boot. I have done SMC reset and power cycle. Although what is odd is I cannot
do a NVRAM reset for some reason, I hold the keys and the second chime never kicks in.
Did not see a 820-xxxxx under the SSD. will look under the board when I can
Edit: After some searching/googling I'm also unable to enter single user mode and reset nvram that way. Wondering if there is a way to mount this mac via thunderbolt cable to another mac and reset nvram from that one
Last edit: 7 years 4 months ago by rav.
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7 years 4 months ago #5675 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
the efidL removes EFI lock not OS lock. if you cannot boot with ALT and get the boot menu, then something's going on.
try the power cycle and then reconnect efidL
try the power cycle and then reconnect efidL
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7 years 4 months ago #5680 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
Well. I can no longer try that as my EFIDL is not displaying LED's anymore haha. Was trying it on another machine, it was showing the slow green flash and now no lights are displayed when plugged into power supply. Is there anything I can do to fix this? I'm not sure what the issue was. The machine was definitely turned off.
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7 years 4 months ago #5681 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
Did you push the self destruct button?
Connect the efidL to power and test for 3.3v between vcc and gnd.
Connect the efidL to power and test for 3.3v between vcc and gnd.
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7 years 4 months ago #5685 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
I'm sure my finger wasn't anywhere near the button.
I've got a multimeter to check the voltage soon.
I've got a multimeter to check the voltage soon.
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7 years 4 months ago #5686 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
OK so there is a 3.3v connection between VCC and GND.
Not sure what the issue is. I've also notice the external battery pack rings a high pitch when I connect it to EFIDL, it did not before.
Is this some how connected? Almost 90% sure I did not hit the kill switch, if that is the case what can be done to save me?
Not sure what the issue is. I've also notice the external battery pack rings a high pitch when I connect it to EFIDL, it did not before.
Is this some how connected? Almost 90% sure I did not hit the kill switch, if that is the case what can be done to save me?
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7 years 4 months ago #5687 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
we can reprogram your device over a remote session if you've self destructed.
do you always use a battery pack? i would recommend testing with a power brick, and use your multimeter to test the LED while it should be identifying
do you always use a battery pack? i would recommend testing with a power brick, and use your multimeter to test the LED while it should be identifying
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7 years 4 months ago #5688 by SargFowler
Replied by SargFowler on topic MBPR 13 inch Late 2013 issues
What are the implications of installing the adapter the wrong way round?
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7 years 4 months ago #5690 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
in my experience.... nothing.
during the testing phase, these adapters had been tried in both positions on countless models, numerous times.
i personally cannot report any adverse effects.
here is a 2015+ header pinout. have a look at which signals would be shorted.
during the testing phase, these adapters had been tried in both positions on countless models, numerous times.
i personally cannot report any adverse effects.
here is a 2015+ header pinout. have a look at which signals would be shorted.
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7 years 4 months ago #5701 by rav
Ok great! I'm wondering if maybe just the LED went out? I do normally use a battery pack for mobility, plugged it into a brick in the wall and I'm still getting 3.3v between vcc and gnd. Not sure how to use the multi-meter to check the LED, but I just probed it the was fluxuating from .8-3v
Also not sure if it is related, but the led on my EFIDL came bent to the board, I guess from shipping but it has worked fine up until now
Replied by rav on topic MBPR 13 inch Late 2013 issues
we can reprogram your device over a remote session if you've self destructed.
do you always use a battery pack? i would recommend testing with a power brick, and use your multi-meter to test the LED while it should be identifying
Ok great! I'm wondering if maybe just the LED went out? I do normally use a battery pack for mobility, plugged it into a brick in the wall and I'm still getting 3.3v between vcc and gnd. Not sure how to use the multi-meter to check the LED, but I just probed it the was fluxuating from .8-3v
Also not sure if it is related, but the led on my EFIDL came bent to the board, I guess from shipping but it has worked fine up until now
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7 years 4 months ago #5705 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
Depending on the sophistication of your battery pack, I don't know what to think of it (-:
If you're getting the same result from the power brick, I suppose it's fine to troubleshoot on battery power but I do prefer to eliminate all variables.
If you're seeing voltage go high/low on the led, tats probably it strobing on/off during the identify phase.
Was your efidL purchased assembled or did you buy the DIY kit?
We assemble the unit with the led bent down to the board so that it fits neatly in the compact case (sold separately)
I would inspect the legs for any short and also confirm the resistor values
If you're getting the same result from the power brick, I suppose it's fine to troubleshoot on battery power but I do prefer to eliminate all variables.
If you're seeing voltage go high/low on the led, tats probably it strobing on/off during the identify phase.
Was your efidL purchased assembled or did you buy the DIY kit?
We assemble the unit with the led bent down to the board so that it fits neatly in the compact case (sold separately)
I would inspect the legs for any short and also confirm the resistor values
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7 years 4 months ago #5706 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
Yes I bought it assembled. Alright I'll try that, and perhaps try to see if I can unlock and EFI's without the LED.
How would I fix it is it is a short?
How would I fix it is it is a short?
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7 years 4 months ago #5707 by reverendalc
Replied by reverendalc on topic MBPR 13 inch Late 2013 issues
that all depends on what shorted!
test for 3.3v between the red arrow and the black arrow. the red arrow is the 3.3v supply for the LED.
then test for 3.3v between the red arrow and the top 1,2,3.
then measure resistance between top&bottom1, top&bottom2, top&bottom3.
test for 3.3v between the red arrow and the black arrow. the red arrow is the 3.3v supply for the LED.
then test for 3.3v between the red arrow and the top 1,2,3.
then measure resistance between top&bottom1, top&bottom2, top&bottom3.
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7 years 4 months ago #5708 by rav
Replied by rav on topic MBPR 13 inch Late 2013 issues
EFIDL plugged in
There is 3.3v between Red and Black arrow
Red and top 1: fluctuates from .8 to 357
Red and top 2: fluctuates the same as 1
Red and top 3: -220mV I think
EFIDL unplugged
left resistor: 220
middle resistor: 218
right resistor: 217
Assume since these are supposed to be at 220 that these are alright?
Appreciate the diagram
There is 3.3v between Red and Black arrow
Red and top 1: fluctuates from .8 to 357
Red and top 2: fluctuates the same as 1
Red and top 3: -220mV I think
EFIDL unplugged
left resistor: 220
middle resistor: 218
right resistor: 217
Assume since these are supposed to be at 220 that these are alright?
Appreciate the diagram
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