no start up chime or display

Question

iMac Intel 20" EMC 2105 and 2118

Model A1174 with 2 GHz Core Duo or Model A1207 with 2.16 or 2.33 GHz Core 2 Duo

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postmordum @postmordum

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Postato: 2 set 2012

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no start up chime or display

I recently replaced a faulty power supply, when i try to turn it on, the fans come on and i can hear the hard drive spinning, but there is no start up chimes or display.

-FIXED- when my power supply went out, it did so during boot up, this corrupted the boot portion and somehow damaged one of my ram sticks, after replacing the power supply, i removed the bad stick (causing the no chimes) and put in a new hard drive and re-installed the os, it booted just fine. i was even able to get data off my old hard drive and reformat it to be an external drive.

--EDIT-- The ram was not damaged, was trying to use two ram from different manufactures. Needed to be two identical sticks.

Risposto! Visualizza la risposta Anch'io ho questo problema

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4 Commenti

Thank you post mordum. I think i purchased your iMac on E-bay for parts not working. Thanks for clarifying the 1174 does not have LED lights-or does it?

7 mag 2014 da will

will, this question is 2 years old.

7 mag 2014 da oldturkey03

Will they all have the LED's but the view might be obstructed. See link in comment below.

7 mag 2014 da originalmachead

The problem was using two different ram sticks. I upgraded a mac book ram for a friend and tried using the two old sticks in this computer, they were same size but different manufacturers. Using either one and the computer worked booted, but both together caused problems.

8 mag 2014 da postmordum

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Soluzione Prescelta

originalmachead @originalmachead

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Postato: 3 set 2012

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The chime means all is well - you have no display so all is not well. Check the LED lights inside the machine... it may point to the source of you other problem.

If this answer was helpful please remember to return and mark it Accepted.

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5 Commenti:

Thank you for taking the time to respond. I've found if i only use one of my two ram sticks it will start, the screen turns on, and the chimes play. the circle spins for 10-15 seconds, and them the system shuts down, and this is the problem i had before i changed out my power supply. any ideas?

3 set 2012 da postmordum

What are the LEDs showing during this time.

3 set 2012 da originalmachead

my intel mac version is so old, it does not have debuging lights, but i figured it out, thanks for all the help.

29 set 2012 da postmordum

Please Share the answer so others may benefit. BTW they all have the LED's but the view might be obstructed.

7 mag 2014 da originalmachead

The problem was using two different ram sticks. I upgraded a mac book ram for a friend and tried using the two old sticks in this computer, they were same size but different manufacturers. Using either one and the computer worked booted, but both together caused problems.

8 mag 2014 da postmordum

Aggiungi un commento

Thank you post mordum. I think i purchased your iMac on E-bay for parts not working. Thanks for clarifying the 1174 does not have LED lights-or does it? — will
Will they all have the LED's but the view might be obstructed. See link in comment below. — originalmachead
The problem was using two different ram sticks. I upgraded a mac book ram for a friend and tried using the two old sticks in this computer, they were same size but different manufacturers. Using either one and the computer worked booted, but both together caused problems. — postmordum
Thank you for taking the time to respond. I've found if i only use one of my two ram sticks it will start, the screen turns on, and the chimes play. the circle spins for 10-15 seconds, and them the system shuts down, and this is the problem i had before i changed out my power supply. any ideas? — postmordum
my intel mac version is so old, it does not have debuging lights, but i figured it out, thanks for all the help. — postmordum
Please Share the answer so others may benefit. BTW they all have the LED's but the view might be obstructed. — originalmachead
The problem was using two different ram sticks. I upgraded a mac book ram for a friend and tried using the two old sticks in this computer, they were same size but different manufacturers. Using either one and the computer worked booted, but both together caused problems. — postmordum