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continuing chime and not booting

Z

zoran

macrumors 601
Original poster
Jun 30, 2005
4,816
134
My 27” mid2010 iMac continuously chimes. The screen remains dark and will not boot! A few weeks before it was freezing suddenly and would reboot. This is the second grfx card im using after replacing the first.
Any ideas what could it be?
 
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No, this is the new GPU ive been using and it seems that it broke since it started chiming and not booting! :confused:
 
Pram reset, you post is like looking for a needle in a haystack. “My computer won’t boot”
not much to work with duh!
 
Well i guess we must turn down options.
Pram reset was done.
 
What Nbuyen sais is true, but I have a feeling that the pre-flashed GPUs do not work as smooth as the native ones.
I want a plug n play solution without any hickups if you know what I mean.
I’m using the imac professionally for my design work. No luxuries for testing it or experimenting with it.
 
zoran said:
What Nbuyen sais is true, but I have a feeling that the pre-flashed GPUs do not work as smooth as the native ones.
I want a plug n play solution without any hickups if you know what I mean.
I’m using the imac professionally for my design work. No luxuries for testing it or experimenting with it.
Click to expand...

Where I live, professionals don't really care about hardware and OS, they use other professional services (not Apple authorized one) to get their applications running smoothly, even for just SSD and RAM upgrade. And the services include both on-site hardware installation and OS upgrade, with 6 months warranty, too.
 
What professionals are u referring to? Graphic design professionals?
 
zoran said:
What professionals are u referring to? Graphic design professionals?
Click to expand...

There are more professionals using the iMac than what you imagine.
Photographers, Photo editors, workers in photo service shops (They repair old photos for other people) video content creators, music makers, coffee shop owners (the iMac is just a decorative item and payment counter at coffee shop).
These professionals don't even need any knowledge about the hardware. They just pick their phones and call the repair shops to help with their problems.
 
I honestly would like to come intouch with a Photo editing pro, that has installed a pre-flashed GPU to his 27" iMac and is happy with image color/quality and the plug n play connectivity ;-)
 
DeltaMac said:
I would suggest trying a different power supply... 12/13 year old electronics - parts can fail.
Click to expand...
1. If it was the power supply shouldn’t I get no chime at all?
2. I was just having graphic ornaments freeze
3. Last time I had those issues and changed the grfx card, all was fixed, now the same things happen
That’s why I believe it’s the grfx card 😐
 
zoran said:
1. If it was the power supply shouldn’t I get no chime at all?
2. I was just having graphic ornaments freeze
3. Last time I had those issues and changed the grfx card, all was fixed, now the same things happen
That’s why I believe it’s the grfx card 😐
Click to expand...

You are placing yourself in a dead-end with no suitable solution.
Beating around the bush and declining others' suggestion won't help you.
Let's get back to the beginning:
Situation:
You have a non-working iMac. The symptoms all suggest that it's the faulty graphic card.
Your objective: ???
Your skill set in fixing iMac? (We all know that you are capable of disassembling your iMac and replace the graphic card)
Your budget:???
What are you willing to do/spend? (Except the will to go against everybody's suggestion to read the already made guideline of upgrading graphic card)
 
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I am not declining any solutions, I was just replying to Delta so he knows the problem because although power supplies become faulty, I don’t believe it’s the power supply.
 
My thinking is that the power supply may be deteriorating. Good enough to get some power to the logic board, but marginal at best for some of the parts that need significant power, such as lighting up the display. Could it be the graphics card? Yes, of course--- but you said in your OP that you are on your third card, so I'm thinking that you might want to think "outside the box", and try something else that might be contributing to your problem. A marginal power supply may still provide some power, but might not provide enough reliable power for the display.
 
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Oh I do wish you are correct. But if it’s the PowerSupply, why would the issue be fixed when i installed a new grfx card?
 
It seems to me that the OP is just posting questions for others to answer and entertain him.
He doesn't seem to care about his issue and neglect our questions about his situation for better solutions.
This maybe the reason why many other have been neglecting his multi questions and threads.
I'm just bored enough to do a chatting with him for fun and to test my patience.
You guys don't need to take him seriously.
 
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Nguyen Duc Hieu said:
It seems to me that the OP is just posting questions for others to answer and entertain him.
He doesn't seem to care about his issue and neglect our questions about his situation for better solutions.
This maybe the reason why many other have been neglecting his multi questions and threads.
I'm just bored enough to do a chatting with him for fun and to test my patience.
You guys don't need to take him seriously.
Click to expand...
We have discussed this before. Although you know stuff and have helped me before, u get angry when someone doesn’t go along with what you say or makes second thoughts.
You get upset, like now. You suggest to others that I’m a bad person, neglecting solutions/suggestions I get from others.
That’s not the case at all.
I’m only asking reasonable things, for example how can it be the power supply since when installing a diff grfx card the symptoms were fixed.

Delta, in noway I’m I rejecting what u suggest, I’m only thinking about it and making a comment.
I certainly appreciate the help I’ve received from u and others (+Nguyen’s) in the past and iam grateful!
What more can I say? I really mean it ❤️
 
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The power supply is simply a step for troubleshooting your issue - one that I have seen fix problems similar to yours.
One possible reason for the graphics card fixing, then failing again, is that you have a 12-year old iMac. Parts begin to fail simply from age (and heat, over time, will begin to break some electronic components down. Very often does not fail all at once, just a bit of weakening, losing some voltage here and there, and maybe not as much power capacity as it used to provide. One result from that is possible failure of a major part (such as a graphics card), then replace that with a good part, which works (for a while), then, because the real cause (a weakening power supply) is still there, and continuing to break down. Then perhaps causing a failure in the graphics card again, because of that same power supply.
Don't misunderstand me... This is not a guaranteed fix for every graphics issue, just one that I have seen a few times in the past. And, easier/cheaper to try than the next possible fix, the logic board.
It's always a good plan to think before you jump in to a repair that may cost more than the computer is worth, but also a good plan to consider what is happening from a real-world perspective, including listening to others who may have actual history in fixing an issue such as the one you have now. Isn't that ultimately why you come here in the first place?
 
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