Il giorno 28/03/18 03:11, "[email protected]" ha scritto: > In fact, I cannot get even a startup chime unless I pull one of the RAM > cards out. Ok, so it definitely has some RAM issue. Maybe a video card issue, too, but of course that comes later.
> It doesn't matter whether the left one is in or the right one is > in, if I only have one RAM card in, it will produce the startup chime. If you get the chime with either RAM chip, but not with both, it might be the RAM itself is fine (although I would test with other RAM modules to be sure), but the RAM slots and/or controller have issues. > However, I still have a black screen. That could depend on a video card issue, or still a RAM issue (e.g. if the RAM controller is faulty, maybe it pass the first tests but then hangs up later). Or, it could be the screen (monitor) is dead, if nothing ever appears on it. Do you have an external monitor to connect? > - If it is the video card, does the RAM card thing make any sense? IMO, there's some issues with the RAM part, regardless of the video card. > - If the video card was going out, should the Apple Hardware Test have > told me that when I ran it last week? Keep in mind AHT is not omniscient: some faults are intermittent, or AHT cannot detect them all. > - Is there any way to be certain that the problem is the video card? Until you solve the RAM issue (so you can boot), I don't think so. Afterwards, once you are able to boot, you might connect an external monitor to check whether the issue is video card- or monitor- related. And you could try my trick to boot into Safe mode to delve deeper. -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/imaclist --- You received this message because you are subscribed to the Google Groups "iMac Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
