After Hitting Power Button - iMac Turns off and on after 5 seconds
The iMac will turn on and the screen lights up after 5 seconds, it then power cycles off and then you hear the chime as normal screen lights up and powers off again after 5 seconds, keeps doing that repeatedly.
I already have:
- Disconnect hard drive
- Changed power cord
- Made sure fan was working
Any idea what would cause this?
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3 件のコメント
With everything connected try running diagnostics. restart your system and holding the D key. Let us know what you get for an error message.
Reference: Mac startup key combinations
Dan さんによる
Yeah it won't stay on long enough to perform diagnostics. It turns off after 10 seconds or so.
dave さんによる
New power supply time and a surge suppressor or better yet a UPS!
Dan さんによる