Late 2005 G5 2.0ghz with no O/S yet powers up but no video. Display works just fine on G4 Quick Silver. Hera to tones when computer starts up then nothing else, just a lot of fan noise.
PowerMac, No OS on computer
OK, with no bootable OS volume, you should be getting at least a grey screen with a question mark folder icon or something similar indicating no bootable volume found.
So what is the history here? Is this a machine just acquired that you are trying to bring up?
How old is the PRAM backup battery? (If unknown or more than a couple of years old or the machine has not been on mains power for some time, then it should be replaced.)
How about the lunar LED over the power switch? Is it on steady after power up or is it flashing? Do you get the normal boot chime?
OK, with no bootable OS volume, you should be getting at least a grey screen with a question mark folder icon or something similar indicating no bootable volume found.
So what is the history here? Is this a machine just acquired that you are trying to bring up?
How old is the PRAM backup battery? (If unknown or more than a couple of years old or the machine has not been on mains power for some time, then it should be replaced.)
How about the lunar LED over the power switch? Is it on steady after power up or is it flashing? Do you get the normal boot chime?
just acquired. light flashes twice pauses then flashes twice etc no normal boot chime just two tones at startup
Can you count the beeps or flashes?
1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable
In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.
Note: In this case, a flash is considered to be 1/4 second or 250 ms or greater in length.
delew wrote:
just acquired. light flashes twice pauses then flashes twice etc no normal boot chime just two tones at startup
2 Flashes: No RAM is installed or detected.
There is 2 beeps at start up and then the LED lite does flash twice every few seconds, there are 2 512 MB installed pulled them out and they are the correct ones for this machine PC2-4200. There are 8 ram slots these were installed in the bottom 2 of the top 4 slots should I try other slots?
Have to go to work check back later. Thanks for the help so far.
The RAM must be installed in opposing pairs, 1 with 1, 2 with 2, etc...
4-3-2-1*1-2-3-4
BDAqua wrote:
The RAM must be installed in opposing pairs
Nice to see something reported that actually aligns with what the symptoms are. I am guessing delew will follow your map and be at least a little farther along.
That being said, I recommend to delew the Apple Support Power Mac manuals page for more official information.
Ram now installed correctly, new PRAM battery, everything starts up properly but still no video. tried both connections on video card nothing
delew wrote:
Ram now installed correctly, new PRAM battery, everything starts up properly but still no video. tried both connections on video card nothing
OK, try to see if video comes up when you boot into open firmware with the cmd-option-O-F keys held down at power up. This is at a pretty machine-fundamental state and is a good indication of whether there is a video card problem. If you do get video at that point, it will be a white terminal screen, and you should enter the following two commands:
reset-nvram <enter>
reset-all <enter>
The first command sets the non-volatile memory to its default values and the second command forces the machine to restart.
I fear you may have a honked video card, but we need to try open firmware to disprove that.
late 05 G5 starts up no video no OS on hard drive, late 05 G5 starts up no video no OS on hard drive
