Verifying bad logic board vs GPU
UPDATE: I have replaced the motherboard. I have replaced the power supply. Neither of these have solved anything.mi have the exact same symptoms. I guess now I don't get startup noises, but I assume that's because of moving ram around and such. But perhaps it's important.
As a recap: screen and USB controls failed at the exact same time. No keyboard commands forwarded through USB. No wireless mouse connection. indicator lights 1, 2, and 3 come on on power up, computer boots, fans run, but no screen, no USB command
I have an unformated SSD that I tried plugging in as a replacement of my HD with no additional response from either.
Since it is neither the power supply or the logic board, what is the next step?
Thanks again all
Early 2008 iMac 3.06GHz. Has worked flawlessly up until 2 days ago, when screen went to black while in use.
Upon restart, boot chimes start, have noise from fans and disc tray (with a disc I need to get out of there), but no screen (stays black). Wireless mouse does not seem to be connecting to anything.
Attempt NVRAM reset. Press Command + Option + P + R after boot noise, nothing happens. Discover USB ports no longer sending/receiving power or signal.
Would love to keep as much stuff out of the landfill as possible, so thinking about fixing and upgrading to SSD while everything is opened up. El Capitan really made the computer feel good again, I can only imagine an SSD enhancing that.
Is this a good question?