black screen startup

Hi friends. I was upgrading to Ventura from Monterey 12.4 this morning and my power cut out. My 2019 27inch iMac is now bricked and only runs the fans at max speed after pressing the power button. No screen turn on, all black. I've attempted the usual power cycle, pram, smc, etc to no avail...

Hey everyone, I’ve got a CMP 5,1 with an RX580 that has no boot screen. I installed Refindplus and Opencore using MyBootMgr which is supposed to give you a boot screen again. I have Mojave and Windows 10 that both run fine but I need to guess how to get into them and it’s a major pain, plus I...

Hello, I have two Mac Pro 5.1 (2010) and have 2 problem. First Computer: It doesn't boot, no fans, no chime, no white led in front. When I turn it on, only Graphics card works and some red leds... There is a 'tik tik tik' voice coming from Power supply Second computer: I put tray of this...

I've never had the battery run out of any computer so I don't exactly know how to diagnose it; I just know that the computer might not remember its time/date while starting up offline, but I haven't noticed any clock weirdness so far. The iMac has been starting up without the startup chime for...

Mac pro 2009 4,1 Boots up but no video output (black screen). It was working fine on the old OS that was on it. I want to update to the highest OS it can run. So I did. But after that I get an black screen. I tried to reset some things like time code, vram etc. Nothing works. Can't even go...

Hi folks, looking for some solutions to a start up problem. I’ve got a 2009 17” MacBook Pro running El Capitan. Have had some shutdown unexpectedly problems but just had to persevere. However, now things have taken a serious turn! On start up the white screen is blank for longer than normal...

Macbook Pro Retina Early 2015 (bought refurbished, have no warranties) It had 121 gb storage and I wanted to up it a bit; bought SSD from OWC https://eshop.macsales.com/shop/ssd/owc/aura-pro-x2 with 240 gb. Short story - the change didn't work, but computer still works with my old SSD, so no...

I assume it went to sleep and the display did not wake....I am taking it in under apple care, but just wonder why is the cause. I have tried all the tricks I believe that I found online. Would be nice to have it work till I get it in the shop. Will boot in safe mode.

Hi, I have some issue with my good old MBPr 2012. Everytime I power it on, the screen is black, I have to close the lid for more than a minute, then the display switches on. I can't get the external display to work as well. I reset the PRAM several times but no change. If I recall correctly...

I am in the process of setting up a new iphone 8 plus. I put my older phone next to the new iPhone 8 plus and the new iPhone 8 plus asks for my passcode. I enter it in and it starts the process of transferring info (or so I thought). They both have different iOS's, so I figure it probably...

Hello all, I have just upgraded my Macbook Air to Mojave. After upgrade I am facing a wired situation. 1. I start the laptop 2. Enter the password 3. Now a completely black screen appears for 10 seconds approximately 4. After that the main desktop appears and computer runs fine I never had...

Hi guys about a year ago I encountered the gpu issue that is found in 2011 mbp. I followed the steps that disables the amd chip and it worked, but now im facing a new issue. My mbp turns on but Screen is completely black, no backlight either. No chime. No keyboard backlight. SMC works but...

Hello! Had a question about my mac book pro, I took it into apple because the screen was black but on and the MBP had power it didnt make a sound but the keyboard lit up and the screen did as well it was just a black screen. I wxplained that to the apple guy helping me but he spent a total of...

I've got an early 2009 Mac Pro 4,1 that's often booting to a black screen that hangs indefinitely until I manually restart and try to power on again. This seems to happen about 60% of the time when I try to boot up. Tried resetting PRAM and NVRAM but these resets didn't resolve the issue...

I've read through many threads @MacRumors and I haven't found a solution for my specific problem yet. My system setup: Mac Pro 5,1 Mid-2010 Westmere Dual Quad Core 2.4 Samsung SSD 500GB (as startup/boot disk) 16 GB RAM 3x WD 4TB Disks Sapphire HD 7970 3GB -> It's brand new and for Mac Pro 4,1 /...

okay so I have barely used this Mac and I had it plugged in yesterday morning and came home to some issues. I was sitting on the couch and could hear it running even though it was closed so I owned it up and it was on a screen with a folder and question mark. I hit the power button and it turned...

Before everything, I did this video to explain my problem, after you can read the rest of the post. --- I have one year and a half with my MacBook Pro (Retina, 15-inch, Mid 2015), lovely performance, no problem at all until this weekend. Before Note: I´m from Costa Rica, I bought my MacBook...

I've got an iMac 27 2017 with an i7, the 580 graphics card and an SSD of 1 TB. I've extended the RAM to 40 GB. Everything worked fine, but the last couple of days the screen stays black on startup every once in a while. The fan is running and the screen get's black-grey (as it is 'on'), but...