Big Jim
Well-Known Member
- Reaction score
- 183
- Location
- Derbyshire, UK
ok, number 1, Macbook pro 2012 13"
this came in a few weeks ago not posting, was beeping at boot up
All we did was reseat the RAM and it ran fine after that.
Came back in a week or so later, customer reported any slight movement would cause it to turn off.
My Tech looked it over and was squeezing it in various places which would cause it to randomly freeze, I found something that looked like corrosion on the motherboard where a foam pad had been resting and cleaned it off with isopropyl. After much messing around and moving it around and rebooting, the issue went away. customer collected was shown a booting system, tech picked it up moved it around ect to prove.
Got a call today from a (understandably) annoyed customer because apparently as soon as he tried to boot it at home it it wouldn't work.
Is there a known issue with these that I could investigate to get me looking in the right direction ?
Number 2 - Macbook Pro 2011 15"
The dreaded GPU failure, customer reports weird artefacts and sometimes taking very long to boot, occasionally not booting at all, when it arrives in my shop the screen is white and laptop not doing anything.
I power it down and ever since then it hasn't skipped a beat.
I have had it running a 2k video on You tube for pretty much 2 days solid.
I ran heaven benchmark on it and The GPU hit maximum 77oC when I blocked the vents up on the back, was maxed at about 73oC without blocking the vents.
I tried loading up a few CPU cores on it as well to see if that would trigger anything, and still nothing.
GFX card status app confirms that the GPU is correctly switching.
I haven't seen anything that would suggest the GPU is failing, is there anything I can do to try and trigger artefacts ?
Also it seems the "fix" for this is to disable the discrete GPU and have the macbook run on integrated only.
There is a guy who has written a script that removes the drivers and disables the input voltage to the GPU to prevent it from working, and the script will also rerun if PRAM is reset but apparently any update can undo the programs work.
So he has also figured out how to reprogram a chip on the board to permanently disable the GPU.
At present I don't have the chip programmer to be able to do the permanent fix and I wasn't too happy about installing fix that could be undone with an update. what are your thoughts on this ?
this came in a few weeks ago not posting, was beeping at boot up
All we did was reseat the RAM and it ran fine after that.
Came back in a week or so later, customer reported any slight movement would cause it to turn off.
My Tech looked it over and was squeezing it in various places which would cause it to randomly freeze, I found something that looked like corrosion on the motherboard where a foam pad had been resting and cleaned it off with isopropyl. After much messing around and moving it around and rebooting, the issue went away. customer collected was shown a booting system, tech picked it up moved it around ect to prove.
Got a call today from a (understandably) annoyed customer because apparently as soon as he tried to boot it at home it it wouldn't work.
Is there a known issue with these that I could investigate to get me looking in the right direction ?
Number 2 - Macbook Pro 2011 15"
The dreaded GPU failure, customer reports weird artefacts and sometimes taking very long to boot, occasionally not booting at all, when it arrives in my shop the screen is white and laptop not doing anything.
I power it down and ever since then it hasn't skipped a beat.
I have had it running a 2k video on You tube for pretty much 2 days solid.
I ran heaven benchmark on it and The GPU hit maximum 77oC when I blocked the vents up on the back, was maxed at about 73oC without blocking the vents.
I tried loading up a few CPU cores on it as well to see if that would trigger anything, and still nothing.
GFX card status app confirms that the GPU is correctly switching.
I haven't seen anything that would suggest the GPU is failing, is there anything I can do to try and trigger artefacts ?
Also it seems the "fix" for this is to disable the discrete GPU and have the macbook run on integrated only.
There is a guy who has written a script that removes the drivers and disables the input voltage to the GPU to prevent it from working, and the script will also rerun if PRAM is reset but apparently any update can undo the programs work.
So he has also figured out how to reprogram a chip on the board to permanently disable the GPU.
At present I don't have the chip programmer to be able to do the permanent fix and I wasn't too happy about installing fix that could be undone with an update. what are your thoughts on this ?
