Macbook Pro 2010 15" High Sierra turns off and on on startup

[titamerello]

Hello.
I have a Macbook Pro 2010 running High Sierra. I changed the HD for a SSD and upgraded RAM a few months ago and it was working fine.
Today I turned it on and it chimes shows the apple logo and loading bar then it turns off, then it turns on and does the same.
I've tried:
- Apple recovery.
- Reset VRAM/PRAM/SMC
- Boot from old HD
- Reinstall from original DVD
Nothing worked.
What is the next step?
Help please.

 

[Amethyst1]

Boot in verbose mode by holding Cmd-V after powering on and try to see what it says (perhaps by recording a video of it) just before rebooting.

 

[titamerello]

This is booting in verbose mode. See attached video.

 

[DeltaMac]

This is most likely a graphics card failure. The GPU is on the logic board, and is not separately replaceable.
The Fix - is replacing the logic board. (At least you don't have a 2011 - with the radeon GPU. Not that it makes a difference now...

 

[Audit13]

It could be a GPU capacitor issue which is quite common with the 15" 2010 with nVidia graphics.

 

[Amethyst1]

It could be a GPU capacitor issue which is quite common with the 15" 2010 with nVidia graphics.

Yes - the Nvidia GPU itself may be just fine. So it's an easy repair.

 

[OnAir]

Hello.
I have a Macbook Pro 2010 running High Sierra. I changed the HD for a SSD and upgraded RAM a few months ago and it was working fine.
Today I turned it on and it chimes shows the apple logo and loading bar then it turns off, then it turns on and does the same.
I've tried:
- Apple recovery.
- Reset VRAM/PRAM/SMC
- Boot from old HD
- Reinstall from original DVD
Nothing worked.
What is the next step?
Help please.

You mention that you upgraded the RAM. Have you tried removing and re-seating the RAM in case of a bad contact.
Also try with a single RAM board installed, try both, installed alone just to rule out a failed RAM board.
Can you start in Single-User mode (Press Command + S after pressing the power button)?
If so try this command line solution: as shown here

sudo nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00 · Issue #41 · 0xbb/gpu-switch

I would use the gpu-switch but the home page says: "WARNING: broken on macOS +10.12.4". Macbook Pro Early 2011 - Intel HD 3000 and AMD Radeon HD 6750M - Mac OS Sierra 10.12.5 Test: Single-User mode...

github.com

Or again in Single User mode try this command which will disable switching to DGPU:
sudo pmset -a gpuswitch 0

 

[titamerello]

This is most likely a graphics card failure. The GPU is on the logic board, and is not separately replaceable.
The Fix - is replacing the logic board. (At least you don't have a 2011 - with the radeon GPU. Not that it makes a difference now...

I think I do have radeon GPU!
I saved the following info from before the computer stopped working:
Processor 2GHz Intel Core i7
Memory 4G 13333 MHz DDR3
Startup disk HD
Graphics AMD Radeon HD 6490M 256 MB. Intel HD Graphics 3000
Does this mean my computer is a 2011 and not a 2010 like I thought?
How does this change things?
Thank you for your help.

 

[Audit13]

I think I do have radeon GPU!
I saved the following info from before the computer stopped working:
Processor 2GHz Intel Core i7
Memory 4G 13333 MHz DDR3
Startup disk HD
Graphics AMD Radeon HD 6490M 256 MB. Intel HD Graphics 3000
Does this mean my computer is a 2011 and not a 2010 like I thought?
How does this change things?
Thank you for your help.

Your MacBook would have to be a 2011 to have a Radeon GPU.

I had a 15" 2010 and it had an nVidia dGPU.

Once the Radeon onboard dGPU has failed, you will need to permanently disable the Radeon or replace the logic board. The far better option is to disable the Radeon and look for a replacement MacBook.

 

[titamerello]

So, it turned out that I was confused and my mac is 2011.
I disabled the Radeon and it works now. We'll see how long it lasts.