Mac was inside of suitcase and it was inside of a bag.

Mac boots up,I can hear the chime,but the screen is totally black,not even “light” black. Caps lock light doesn’t work.

I tried SMC,PRAM reset, didn’t work.

Reconnecting screen display by unplugging those two things didn’t work. I used this video

Reconnecting battery didn’t work.

I also tried SMC,PRAM reset while the battery was disconnected and Mac was getting energy from the charger. Didn’t work. I used that video.

What else can I do before changing the screen?I don’t want to swap screen cause it’s expensive.

⟐ Commented July 01, 2026 at 22:25 MST

But here is the question: without microsolder experience/ability, is there something else I can do than pay $200+ for a reflow job? For example, one microsolder tech recommended that I pop the logic board (all by itself, disassembled from the laptop) in an oven at 450 degrees for 5 minutes. If that’s safe to do, I’d much prefer that to a $200 repair, as long as I don’t risk destroying the whole thing.

You microsolder wizards out there, what would you recommend? Or where would you recommend that can do the repair for cheap? I’ve already replaced the laptop, so now I’m just repairing to resell.

Thanks in advance.

⟐ Commented May 22, 2026 at 8:20 MST

When first connected to charge , heard booting sound , but lid was closed
After charge completed , opened the lid and pressed power button , nothing happens

Any idea

FYI : I have connected only one fan as I broke fan connector during disassembly

Solved : As the accept comment below, I missed the keyboard connection, so the power button didn't work. Realized this system started automatically booting up on charging and lifting lid

Thanks all for the response

⟐ Commented March 10, 2026 at 9:15 MST

I don't know. It's under the battery pack.

⟐ Commented January 29, 2026 at 16:27 MST

According the the board diagram and spec, I think it's L8300, which is labelled on the spec as 'FERR-220-OHM' and '0805'. However, when I search on digikey our mouser there are hundreds of matches. Does anyone know which one is the right component, and any tips for replacement?

Thanks!

Edit - better images as requested...

Highlight on (stock) photo:

Board diagram component that I think is the right one:

Schematic identifier corresponding to board diagram component:

⟐ Commented November 24, 2025 at 3:52 MST

⟐ Answer edited November 22, 2025 at 14:04 MST

Thanks!

Items in question:

Mid-2012 MacBook Pro 15" Retina (Mid 2012-Early 2013) Right Fan

Newer MacBook Pro 15" Retina (Late 2013-Mid 2015) Right Fan

⟐ Answered October 19, 2025 at 21:45 MST

Concerns about iFixit: Posts from around the Web

• “Be wary of ifixit batteries,” (Reddit.com, August 1, 2018.)
• OWC or Apple Replacement Battery? (Forums.MacRumors.com, March 3, 2018.) LarryJoe33’s post (July 17, 2017) says his iFixit battery drops from 65% to 7% consistently. He said iFixit was unresponsive, and accused iFixit of sending him a battery that which today sells on Amazon for $37.99. He says the battery was a replacement not OEM.

Concerns about OWC

• OWC, you've lost me. This is a long thread in 2014. The gist is that somebody who used to be happy with OWC had a bad experience with a replacement battery.

Concerns about iFixit and OWC

• '''User''' '''JPack''' in the March 3, 2018 MacRumors.com post above, says that the only place you can buy an OEM battery outside of Apple is from Rewa. He says, “You're wasting your time (and money) with iFixit, OWC, and B&H. They're often selling B-grade batteries that have been rejected. Hence your 65% -> 7% experience. You might as well buy from AliExpress as the sellers source the same B-grade batteries.”

Positive Posts about OWC

• Newertech NuPower Mac Laptop Batteries – Review. OWC sells Newertech batteries, hence the review. This guy gave them 9/10 for a rating.

⟐ Commented August 12, 2025 at 13:36 MST

I don't know what I have to do, I need my macbook on the go. I'm a repairing guy, but I need tips on where to start looking.

Than again I started looking online, and found out that there is a graphics card return program. Could my macbook be considered under this program with the problems i'm having?

This is how it looks right now after my first discharge and charge

@danj I've done another discharge, and this is the result after.

Maybe i should indeed take the battery off and try that to give the reset.

What tutorial should i follow to do this?

⟐ Commented March 25, 2025 at 3:54 MST

If it is right I can't see how it fits. Can you please point me to the right one, maybe just an adapter since I won't need durable use. Thanks for your kind reading.

⟐ Commented January 09, 2025 at 14:33 MST

Only thing is working - reboot laptop with headphones on it.

But, after system goes to sleep it again it doesn’t see the headphones.

So finally I have found a replacement and ordered it:

http://www.ebay.com/itm/181122080684?ssP...

After installation I will inform you if this fixed problem.

UPDATE: Just want to share with you that replacement of headphone port hasn’t helped at all. Dont know what to do now, so disappointed. I think this is something with motherboard then.

UPDATE 2: Today i will clean install whole OS. If that is software problem - that should fix it.

UPDATE 3: Clean install doesn't make any difference. Big still exists

⟐ Commented December 28, 2024 at 7:17 MST

I need to replace the airport card in my mid 2012 retina 15” MacBook Pro. I remember reading a few years ago that installing a more recent airport card in this model enables it to upgrade to a slightly more recent version of iOS than normally possible.

To clarify, I don’t mean installing the most recent equivalent of an airport card allows you to install the very latest iOS. It was something like installing a 2014 card allowed you to install the 2018 version of iOS…something like that…

Does this sound familiar to anyone? I figured if I’m going to do this, might as well push my system farther.

Thanks in advance,

-David

⟐ Answer accepted December 07, 2024 at 11:06 MST

What is the black tape that is laid around the cpu and gpu chip? is it kapton tape? or where could i get it from?

Hi there. I took a good picture and what I was refering to was under the heat sink. There is a tape like layer surrounding the chip with an exposed center for the die. On the left chip you can see the black tape and the right does not have it. It did before and this is what im trying to find out what to replace it with. The first more professional image is what it should look like

⟐ Commented November 09, 2024 at 9:01 MST

In MacOS while watching YouTube or Netflix in Safari the temperature would reach 75c-87c in comparison the Late 2013 model 40c-70c, idle temperature is at 70c-80c while late 2013 model is at 40c-55c.

In BootCamp I would get lag stutter in CS:go with 100fps+ spiking down to 30fps every seconds or so. Also, I open up the MacBook to touch the heat sink the late 2013 model is really hot in the fan side of heat sink with fins as well the CPU and GPU when gaming while in the mid 2012 model is really exceptionally hot at the CPU and GPU but is cool or warm with ability to touch for 5-10 sec without issues at the Fan area with CPU temp at 90c but in the very far side of the edge of the heat sink it is cool, touching the CPU and GPU area would show really hot with instant release needed.

I have cleaned the fans and changed the thermal paste already.

idle

Full menu

Image taken without safari closed & cold start

(activities: open safari)

conformation fan is working and youtube in on safari in a tab with music full rpm fan @ 60c

floats around 70c-85c with image on display, without display of safari tab of youtube 64c-74c

⟐ Commented October 29, 2024 at 19:56 MST

My MacBook Pro Retina 15" mid-2012 "died" the other day while I was using it. Or so I thought, until I shone a flashlight through the Apple logo and I saw that the screen was working fine -- just the backlight was dead.

I tried to connect it to an projector, but that didn't work -- could it be that the GPU is dead, not just the backlight? I have a model with an Nvidia GPU and switchable graphics.

Interestingly, I left it for dead for a few weeks, then decided to open it. I didn't do much -- dedusted, pressed on one of the screen cable connectors, then disconnected the battery for 2 minutes and connected it back.

Eureka, it worked again! Backlight and all! (Didn't test connecting to a projector). But then, maybe a day later, it broke again, screen works but backlight doesn't (and again didn't check if connecting a projector works or not).

Some more info:

• 2 years ago it fell ~15 cm (6 inches), and one of the fans started to make noise. It's still noisy but the laptop has been working fine for 2 years.
• On the day the backlight died the first time, the table was wet. I put it on the wet table around noon. It worked until ~10pm that night, then the backlight died.
• None of the water damage detectors inside were colored.

I'm fine with leaving it for dead, but the fact that it came back to life for a day makes me think there might be an easy fix. Is there anything that comes to mind?

Thanks!

⟐ Answered October 11, 2024 at 4:01 MST

I strongly believe I cannot be the first one to ask this haha

i’ve got a mid 2014 13” MacBook Pro with a broken display, and a fully working mid 2012 retina MacBook Pro. I wanted to know if I can put the mother board of the 2014 in the 2012 and create sort of a hybrid, basically resurrecting the 2014 MacBook inside the 2012 body.

is this at all possible?

⟐ Answered October 10, 2024 at 0:14 MST

Have I received a defective battery?

Update:

I have reset the SMC again after waiting for the battery to discharge completely and it is charging faster but the speed is steadily going down. At first it was 30 watts, it’s now at 21.

Update 2:

I have charged the battery to 100% and unplugged it and 5 mins after, the battery was down to 10 percent.

The “Design Capacity” is also dropping.

⟐ Answered September 27, 2024 at 17:17 MST

Now I can only hear the start up chime, but the backlight and display is not turning on at all.

I've checked all the cables and connecters that were reconnected during the repair. The internal display cables don't seem damaged (+ the display worked for 2h after the repair).

Tried to connect an external monitor via HDMI port which didn't work either.

What could be the culprit? Or maybe totally independent defect that didn't have anything to do with my repair? Weird coincidence then...

Update: I must have shorted out my logic board somehow. Ordered a replacement logic board and everything is working fine now.

⟐ Commented September 20, 2024 at 10:23 MST

I found something about SMC reset or whatever, when you hold the shift option and whatever buttons, that kinda worked, the fans stopped turning while i was holding the buttons and after i realised then the charger light went from red to green and everything started as it was, fans spinning mac not booting, im pretty sure that i have not damaged anything, (bcuz screen turned on for a second)

im not sure what to do, as i know this issue is kinda common

⟐ Answer accepted September 06, 2024 at 14:36 MST