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Текущая версия: Ricardo GF ,

Текст:

Dan, tks a lot for all your comments - I just wanted to add another element here: the diagnostic LEDs, as checked from the low/rear vents, are working as follows:
* LED 1: on all the time as long as the cord is plugged;
* all other LEDs: remain on for as long as the computer is on (following a restart).
However, random restarts continue to occur; and when this happens LEDs 2, 3 and 4 all go off until the boot sequence is concluded (which would be normal, I guess). Funnily enough (or perhaps just an anecdotal thing), the iMac seems to restart more often when sitting with the screen down (on the cloth) as opposed to upright. Should I remove all RAM sticks just to double-check if there is a problem of RAM seating?
+
+=== Update (04/29/2019) ===
+
+I may be getting close to the culprit here - is it the power button? I was toying with this possibility by pressing it multiple times during the startup process - and was able to have the same restarts even more often. If this is the case, how would I fix it?

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Оригинальный сообщение: Ricardo GF ,

Текст:

Dan, tks a lot for all your comments - I just wanted to add another element here: the diagnostic LEDs, as checked from the low/rear vents, are working as follows:

* LED 1: on all the time as long as the cord is plugged;

* all other LEDs: remain on for as long as the computer is on (following a restart).

However, random restarts continue to occur; and when this happens LEDs 2, 3 and 4 all go off until the boot sequence is concluded (which would be normal, I guess). Funnily enough (or perhaps just an anecdotal thing), the iMac seems to restart more often when sitting with the screen down (on the cloth) as opposed to upright. Should I remove all RAM sticks just to double-check if there is a problem of RAM seating?

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open