MacBook Retina 12" Early 2016

My MacBook doesn‘t turn on after SMC reset. I've found on Apple pages that this can happen if you reset the SMC without your MacBook connected to its AC power adapter. I've also tried PRAM and SMC reset and nothing.

Black screen, no charging sound and battery picture when connecting to power supply.

I wonder what is this little yellow button on logic board for? Do any of you have a problem like me?

Does anybody know location of power on pads?

MacBook Retina 12" Early 2016

My MacBook doesn‘t turn on after SMC reset. I've found on Apple pages that this can happen if you reset the SMC without your MacBook connected to its AC power adapter. I've also tried PRAM and SMC reset and nothing.

Black screen, no charging sound and battery picture when connecting to power supply.

I wonder what is this little yellow button on logic board for? Do any of you have a problem like me?

Does anybody know location of power on pads?

start by trying to reset your TV. Disconnect the power cord from the outlet, then press and hold the power button on the TV (not the remote), for at least 10 seconds. Then wait a few minutes and plug the TV back in and press power once.

2 blinks on Samsung TV's usually indicates a bad power supply. You will have to give us your TV's exact model number so we can verify this and check the power board. It might help if you post some images of all of your boards so we can see what you see. Use this guide for that. Check the boards for obviously damaged components, like leaky domed caps etc.

iFixit staff suggestion: This is a very helpful answer! For some additional information that might help, you can go to this page, which incorporates information from several of our community contributors (including oldturkey03) as well as other sources.

code f3 is on machine

Hello,

I am trying to save a S9, my company doesen’t need it (no warranty).

If I plug the phone I get a white circle with lightning icon, nothing change after an hour.

Bought another battery, nothing changed.

The phone turns on by itself, if not plugged. Phone vibrates, Samsung Galaxy logo appears and nothing happens.

No signs of burned, missing or water damaged components.

I have laboratory power Supply, microscope, multi meter and experience with notebook repair.

Can you suggest me any diagnostic steps?

Hello,

I am trying to save a S9, my company doesen’t need it (no warranty).

If I plug the phone I get a white circle with lightning icon, nothing change after an hour.

Bought another battery, nothing changed.

The phone turns on by itself, if not plugged. Phone vibrates, Samsung Galaxy logo appears and nothing happens.

No signs of burned, missing or water damaged components.

I have laboratory power Supply, microscope, multi meter and experience with notebook repair.

Can you suggest me any diagnostic steps?

I have a 5E code on my oven it will not work it has power the inside light goes on bu nothing works

This question concerns my mid-2014 2.2GHz Macbook Pro 11,2

At some point in Novemer last year I updated the computer to Big Sur 11.6 from a previous version of Big Sur, and immediately noticed that I could no longer control the screen brightness via any method - keyboard, Control Center, System Preferences, or Terminal - and that the brightness was stuck at around 50-75%. The keyboard brightness controls don't have any effect, the brightness slider in the Control Center is grayed out, and there is no brightness control at all in System Preferences. Attempting terminal commands to change the brightness also produced no result. The display brightness isn't adjustable in any alternate boot mode either - safe mode, recovery mode, or even when booted into an installer from a USB drive.

Things I've tried:

• Multiple SMC and PRAM resets.
• Reformatted the SSD and performed a clean install downgrade back to an older version of Big Sur from USB.
• Tried that again, this time also deleting the recovery partition if my memory is correct - this was in December.
• Updated back up to Big Sur 11.6.
• Disconnected the battery.
• Unplugged and reseated the display cables to the logic board.
• I even decided to try out an OpenCore Legacy Patcher Monterey installer I had sitting around to see if forcing a newer os install might refresh something, but the same problem persists.

I'm attaching screenshots of what the Control Center and System Preferences show.

Nothing I've tried has had any effect, and the display brightness still cannot be controlled. The computer has sat for months now because I replaced it with a new M1 Pro Macbook Pro in December, and the old laptop became a low priority. It bothers me though to have an otherwise perfectly functional Macbook Pro that was broken by a software update. Is there anything else I can try as a computer-savvy person? (I don't know if the Apple store would even work on this laptop, as it is "vintage" and has had non-Apple repairs made to it in the past.)

As an aside, the computer has an aftermarket SSD, and a replacement display installed by me. The replacement display worked flawlessly for about three years before this issue happened, so I don't think it's the fault of the display.

Thanks.

I knowingly bought a faulty MacBook Air recently where there was an issue with the display. I was hoping it was just some weird issue that would be resolved with something as simple as resetting NVRAM/PRAM, SMC or booting into safe mode, but this does not seem to be the case.

I already had a MacBook Pro from 2015 with a broken LCD, very easy to spot that it is in fact a broken LCD with all the magic rainbowy lines, black ink migrating across the screen etc., but this new faulty display is not like that which did give me some hope.

After further inspection upon the MacBook Air arriving, I noticed some weird small speck that seems to be kind of embedded into the glass of the display, this does seem to be outside the "LCD"-zone, aka. on the black edge part at the top.

I also spotted that the black plastic strip at the bottom of the display, with the "MacBook Air" logo in the middle seems to be cracked on the left-side.

The white column that I suspect is an attempt at displaying an Apple logo. This also seems to be the brightest I can get the display to be, and the only thing I was able to see. Once actually started and being functional (on an external display) I could not see anything at all on the built-in display.

The weird speck embedded in the glass at the top of the display, ~5cm from the left edge, around same distance as the camera from the top edge of the display

The cracked plastic cover at the bottom of the display

All feedback, suggestions and information is much appreciated! Judging from the very dim white line I suspect the backlight might be having some issues also maybe? I actually have no clue though. I am considering getting a replacement LCD-panel but thought I'd ask here first in case this is some other issue!

I might also add that the keyboard seems to be very dim as well, they both light up a little bit though, visible ex. when in a totally dark room, you can see both the screen and keyboard light up a little. Not much at all though.