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I?ve already done the enable/disable GPU and so not much difference. Swapping the GPU chip itself is going to be more than I'm capable of, so if that's the next step I think you can stop here. It's a hobby on my side, not a job so I don't want to burn your time budget on my fooling around.
I've...
Downloaded OpenBoardView and the schematics and did some poking around this evening.
PPVCORE_GPU = 0.856V (when discreet graphics enabled, 0V with integrated)
PPBUS_G3H = 7.8V (measured from C5305)
PP0V75_S0_DDRVTT = 0.767V (measured from C7360)
PP5V_S0 = 5.00V...
Alrighty, tests with RAM in the bottom slot resulted in multiple kernel panics in the OS test suite. RAM in the top slot did the same.
I tapped on the RAM and various parts of the board while the test was happening and it seems to fail only when doing the video test.
I'm up for more ideas...
No, I didn't think it was necessary given the boot loop and the memory tests that passed both in the EFI and OS test suites.
I can give them a wiggle while running a memory test. Anything else I can check/do while I have the toolbox out?
I'm wondering if there's a voltage regulator circuit...
Giant torrent does not contain ASD 3S138. Neither does the greater Interwebs. I'll dig in the darker web, but if someone happens to have a copy I'd appreciate it.
Good news: Just an idiot and didn't read things properly. Hunt for ASD_ssps_693-7303-A.003.dmg.
Definitely helpful!
ASD - EFI passed (except S.M.A.R.T., DMA skipped), OS failed with 27 failed cases
gfxcardstatus - Crashes regardless of integrated or discreet
charger only - boot loop. Never manages to bring up the GUI before dying and blinking five times.
Notable thing about the failed...
ASD - Downloading pack now. Unsure which parts of the 52GB torrent are needed, but I'll figure it out.
gfxcardstatus - crashed while forced to integrated. testing discreet now.
charger only - I'll unplug the battery tomorrow.
Hmm. Noticed after the last crash that the discreet GPU is back. No upgrade or anything. I was under the impression this'd stick a little longer, and involuntary nvram reset is a hell of a thing to search for on Google.
Questions from me so far on this thread:
1. What are the motherboard...
Used machine, no history. Has a large dent from a hard drop on the front-right side. Currently hitting random kernel panics whether the machine is hot or cold. No visible water damage on the back of the motherboard.
Because coreaudiod seems to be on the CPU most often during death, I wonder if...