Efi Removal Step-by-Step

Disconnect the battery and the MagSafe.

Put your multimeter on continuity.

Put one probe on leg 1 and visually follow the traces to the next test point or component, and test for continuity there. Once confirmed, take note or mark the point, then repeat with leg 2 through 8.

hi,mariob what programmer is best tl866a or tl866cs?
I need buy,but I have rt809f

asterix99 wrote: What's the best way to find the correct contact point on logic board where to solder the wires ?
Thanks

mariob wrote:

The following is an outline of its logic board, how to read your chip correctly!

You have to solder the wires to the correct points of its logic board, as it is in the picture!

Note. You will need to feed the wire pin 4 with GND, and the wire pin 8 with 3.3v!

Only then will have a correct reading.

Friend, these are the exact points on the image above its logic board of each pin to be used in MiniPro TL866CS recorder!
Just identificar on your plate each point, and solder the wires.

k-pax wrote: hi,mariob what programmer is best tl866a or tl866cs?
I need buy,but I have rt809f

Hello friend, all these writers are good, just knowing how to use properly to read the chip!

Never forget to use an external source to power the chip with 3.3v on pin 8, and pin 4 with GND!

In this way only will have success with your ROM.

Never forget to use an external source to power the chip with 3.3v on pin 8, and pin 4 with GND!

If I not be wrong that voltage can be do by Raspberry 3 only.
Is it right?

those programmers do not offer higher than 1.8v (mariob correct me if i'm wrong?)

you do not have to use the raspberry pi, you can use ANY 3.3v power supply with 3v3 and GND terminals. you could use an ATX power supply if you wanted.

but the 1.8v provided by the tl866 is not enough.

reverendalc wrote: those programmers do not offer higher than 1.8v (mariob correct me if i'm wrong?)

you do not have to use the raspberry pi, you can use ANY 3.3v power supply with 3v3 and GND terminals. you could use an ATX power supply if you wanted.

but the 1.8v provided by the tl866 is not enough.

Exactly my friend, recorders unfortunately not spend a load of 3.3V, an external source is needed for this, otherwise not consiguirá read the chip and successfully record!

asterix99 wrote:

Never forget to use an external source to power the chip with 3.3v on pin 8, and pin 4 with GND!

If I not be wrong that voltage can be do by Raspberry 3 only.
Is it right?

Hello friend, use the pins below the board for Raspberry PI:

PIN 8 + 7 + 3 together (3.3v, WP, HOLD) in PIN 17 Raspberry PI
PIN 5 MOSI in PIN 19 Raspberry PI
PIN 2 MISO in PIN 21 Raspberry PI
PIN 6 SCLK in PIN 23 Raspberry PI
PIN 4 GND in PIN 25 Raspberry PI
PIN 1 CS in PIN 24 Raspberry PI

But still may need an external source!

If your raspberry pi is connected to a power supply of 5v1a or greater, you do not need an external power supply. That's the benefit of using the pi

Hello,
now my logic board is on my desktop and I see the efi chip.... but how can you make that micro-solder ? Is very very small contacts ....any suggest ?
and by my multimeter I've difficult to find the pin5-contact, I've follow the images above but I can't find it. --> OK found it, is in the back of logic board!

The problem remain with micro solder that wires....
Thanks

for the very small contacts, you should use a soldering iron with a very fine tip. i've seen people attach sewing needles to soldering irons, though i'm not sure how well that works. a good micro tip is <$10.

for the wire, i would cut up a network cable or phone line and use the tiny wires inside.

strip the tip of the wire, tin it, then press it onto the contact with the iron.

perhaps you should dig up an old motherboard or something trivial to practice on

Ok I'll check that way....

I'm try but It's very difficult, the contacts come off easily with the iron

I think I need an easy flash connector. Can you help me about that ?
Thanks

reverendalc wrote: for the very small contacts, you should use a soldering iron with a very fine tip. i've seen people attach sewing needles to soldering irons, though i'm not sure how well that works. a good micro tip is <$10.

for the wire, i would cut up a network cable or phone line and use the tiny wires inside.

strip the tip of the wire, tin it, then press it onto the contact with the iron.

perhaps you should dig up an old motherboard or something trivial to practice on

Connectors are released. Should be available for purchase shortly.

Keep an eye on the gh store

ok... in meantime I was reading here ghostlyhaks.com/forum/efi-destroyer-lite/674-mac-reports-specifications-per-device the specifcs to find what connector is ok for my MAC Book Air A1465 EMC 2558 but I can't find my Mba model. What easy flash adapter is ok to use with my Raspberry PI 3 model b: 4.0.1, 4.0.2, 4.0.3 ?
Thanks

you should be using 4.0.2

Yes, I've check it already and purchased on 29/10
Please can you say me if is it shipped ? n° GH021341016

reverendalc wrote: you should be using 4.0.2

Hello,
when I use the connector Efi chip and Raspberry, need I to disconnect the battery pack of mac book before to start the flashroom process ?

your mileage may vary.

try:
battery disc, magsafe connected
battery AND magsafe connected
battery connected, magsafe disc

when you find your winning setup, please post results here:
ghostlyhaks.com/forum/efi-destroyer-lite/711-post-your-successful-flash-environments-here

Thanks for reply, I've successfull disconnecting battery connector.
Now I've restarted with keys command+option+r+p and I've initialized the disk.

I've prepared an USB with el captain image... How can I start from usb to install the new OS ?
Thanks