[SOLVED]2012 21" iMac shut down issues

Ryanlen2

Member
Hey!
I have an iMac that "seems" to be in good working condition once booted, but has these weird issues.

- When I plug in power, fans go high indefinitely until I press the power button then it chimes and boots into O.S. like normal. Then when I shut down from O.S., it seems like it shuts down but it never does. The screen goes black and fans run high again until I press power button, then it boots all over again. I cant even hold the power button to cut power.
- When I try to run ASD it gets stuck after initial POST test. Keyboard and mouse will not work when this happens.
- Fans go high when it goes to sleep.

History - Came in with no video. Someone put a fuse in place of L9100. Other than that, it looks fine.

Thanks. Have a good one.
 
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