Macbook pro 13 , 2012 (820-3115b) boot problem

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • nacora
    New Member
    • Dec 2016
    • 2
    • Switzerland

    #1

    Macbook pro 13 , 2012 (820-3115b) boot problem

    Dear forum
    I have a rare (for me ) problem with a macbook pro 13 inch 2012 , the model of the motherboard is 820-3115b . It gives green and orange light on the charger , it starts normally with the dong and comes to the flashing question mark foleder and then nothing ...
    Most of you will say its the harddisk cable , exactly my thought as well but after changing 5 cables still same thing ... and it does not boot from usb either , tried asd , external boot disk and cd .... nothing .
    It does read from the usb as I can see the light flashing on my usb and external disk but still the irritating flashing folder....

    Any ideas anyone ?
    I did try disconecting everything one by one , the cd , the battery and so on , tried to change the ram several times ..... no change
    I f anyone had this problem please advice
    thank you in advance for your time .

Related Topics

Collapse

  • Ancient1
    MacBook Pro 2012 A1398 : Battery BMS circuit repair OR can it boot WITHOUT a battery ?
    by Ancient1
    Hi
    I received such Laptop as junk. Opening it I saw a lot of whitish water residue , but no corrosion really ( few coils have small brown rust marks, no green copper ).
    I cleaned all thoroughly and interestingly , its the Battery BMS board that has the real corrosion spots.. under the protective clear Goo !!

    I want to try and power up the laptop

    Battery is swollen. But I don't want to buy a new battery right now , of course .

    I started work on the BMS by zooming in on green spots . 2 VIAs are filled with rusted copper goo - who knows...
    04-17-2024, 12:46 AM
  • dqtech
    macbook pro late 2012 A1425 boot issue
    by dqtech
    this is my first time having this issue...everytime turn on will have this kind of word before apple logo appear....and sometimes just stuck here and have to force shutdown and turn on again....anyone have solution for this?...
    12-22-2024, 01:54 AM
  • No Lan
    [Macbook pro A1708] [Boot loop] [Trackpad ?]
    by No Lan
    Hey everyone,

    Usually, I'm not the type to ask for help, but this time, I'm calling on your wisdom and expertise I've seen what this community can do, so I'm pretty sure you guys can help me out.

    Here's the deal: I noticed my MacBook got stuck in a boot loop. After opening it up and doing some initial troubleshooting, I found that the boot loop stops only when the trackpad is unplugged.

    Now, just so you know, the trackpad actually works — I tested it with another motherboard and it's all good. Same for the cable, no issues there. The problem is only...
    05-24-2025, 03:09 PM
  • Rezendes
    Looking for 13" Macbook Pro A1278 mid 2012 820-2565-A Schematics and Board View
    by Rezendes
    Hello, I am looking for any and all files related to the mainboard for 820-2565-A (13" Macbook Pro A1278 mid 2012) schematics/board view.

    I looked through forum search results and google and was unable to find a board view file, I found a pdf of all the schematics but I don't know where the parts physically are on the board as this is my first macbook board level repair attempt.

    The macbook charger has a green light, the battery has been replaced and OS reports Normal status but Not charging. After cleaning a corroded capacitor it crumbled off the board. There...
    05-10-2024, 02:18 PM
  • twonk9098
    Macbook Pro mid 2015 battery required to boot?
    by twonk9098
    I have read many forums that state the Macbook Pro 2015 needs / does not need a battery to boot. I'm not convinced as yet which is correct.
    The Macbook Pro mid 2015 I have has no battery and do not really want to buy one just to test.
    This model has the newer trackpad which is not clickable when turned off.
    At the moment, without battery it does turn on with no display (with backlight), no chime and then turns off after 13 seconds. I see this from the power draw on my DTPS.
    If I hold the power button whilst connecting the magsafe 2 charger it turns on, again no image but...
    12-10-2024, 06:51 PM
  • Loading...
  • No more items.
Working...