Hello, I think my 5.1 died.
its won't post.
The Bootrom was 144.0.0.0.0.
Its a 2010 with a W3680.
I never had the W killer Rom in there.
I removed pretty much everything except for WIFI and Bluethoth cards to find the problem.
I read the repair Manual, but I didn't get it 100%.
The red OV TEMP LED CPU-A CPU-B flash once when power is connected and when it is disconnected shorter.
If I press the DIAG button before I try to start it up, the 5V STBY is steady Yellow.
If I start it up, the fans spin up to normal, and the red LED on the Processor tray is flashing once red
but other wise it stays dark in there.
If I press the DIAG button I get the PSU LED green, the 5V STBY Yellow and the SYS PG LED is green.
but everything bellow is off.
I have installed WIN10, Boot Camp, to trigger the Titan Ridge Thunderbolt Card.
that worked very well so far.
Im pretty sure it is installed in Legacy mode, unless I completely misunderstood how to, which I doubt.
I unplugged the power, moved the machine 3 feet and plugged in, dead.
before that I had a little trouble to get bootcamp to boot in to OSX, it kept booting in to the recovery partition of OSX. Then after about 3 attempts it did boot into OSX again, but I think the next time I try to boot it was dead. Im not 100% sure though if it was once or twice.
I changed the CR battery also.
Is that a dead EFI ?
I could get a other one for more or less decent.
Since I have invested in CPU Graphics Ram and THB, I would like to stay in 10.13 or 10.14 for now.
Otherwise it will be a long upgrade tail since there is some old software I want to keep using.
Im a bit afraid it will happen again.
As far as I understood, there is no real evidence, what exactly causes the EFI to become corrupt.
there was strong Suspicion that Win10 Installed in EFI mode causes it.
I could be wrong about that, since the knowledge is probably much more advanced by now.
I hope it is not the wrong thread, if it is, please point me there, thanks a lot.
NoLemon