iMac used to beep in morse code, but now doesnt show signs of life
as the title says, the iMac on boot beeped SOS in morse code (or OSO, i forgot which), but after a while it stopped doing that, and now doesnt seem to react to any input.
Any ideas on what it might be/how to fix?
Esta é uma boa pergunta?
@kirinplays it has already been established that this a EFI issue, which may originate at a few places. I'd start off by resetting the SMC and PRAM. Then I'd go on checking the RAM. Remove one module at a time and isolate with one known-good memory module installed in one memory slot. Repeat by testing in other memory slots. Restart and see if that makes a difference. Check the diagnostics LED on your logic board and let us know what they display.
Replace the PRAM battery for sure. Take some pictures of your power board and this area "from the top left corner of the iMac (viewed from behind)there is a sort of electric buzz" to see if we can try to determine about this buzzing sound.
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por oldturkey03