iMac won't boot up

Joined
Apr 7, 2011
Messages
1
Reaction score
0
Points
1
Hi!!
I just got a used iMac 20" G5 (a 2005 model) without a hard drive or memory. I then bought a 80GB hard drive and 1GB Dr3200 memory. After I installed both and re-installed the software, the iMac worked fine and even connected to my in-home network. I even played part of movie on it and it worked fine. When I started the machine and got a network connection, it must have got an update for the OS software and asked if I wanted to upgrade to it. At first I said no but as I thought more about it, and not ever having a Mac before I finally said yes and did the upgrade. I shut it down fine but when I started it again I got the bong sound and then a couple of error beeps and then I shut it down using the power button hold-down. Now when I try to start it I get nothing past the initial power on light, and eventually the fans go into fast mode. The screen does not even begin to light up. I checked the LED lights and the first two are on, when you plug it in the LED # 1ights up and then #2 lights up when the power button is pushed but #3 never lights up at all.
I took out the hard drive and the memory stick but it acts the same way. I am beginning to think the CPU is not working properly. Could that be it? I do not have any more memory to check it with either right now. Should I dissemble the CPU and check the continuity? Do I need special tools to do that?
Thanks for your help. I really need it.
 
Joined
Oct 22, 2010
Messages
2,571
Reaction score
79
Points
48
Location
Bretforton, Worcestershire
Your Mac's Specs
MacBook Pro 15" 2014, 2.2GHz i7, 16GB RAM, 250GB SSD, OSX 10.9.5 - iPhone 5s 16gb
Welcome to Mac-Forums alsiebert
Wish it was under better circumstances. Now you say that you got 2 error beeps at start up? That means that the RAM is incompatible! The full list is below...

1 beep = No RAM installed/detected

2 beeps = Incompatible RAM type installed (for example, EDO)

3 beeps = No RAM banks passed memory testing

4 beeps = Bad checksum for the remainder of the boot ROM

5 beeps = Bad checksum for the ROM boot block

Hope this helps a little
- Simon
 

Shop Amazon


Shop for your Apple, Mac, iPhone and other computer products on Amazon.
We are a participant in the Amazon Services LLC Associates Program, an affiliate program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
Top