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Aug 21, 2014 7:13 AM in response to Lawzenthby Allan Jones,When he unplugged it to move it , the internal backup battery may have died. That can cause a lack of video in some Mac models.
However, before we recommend a backup battery replacement or other troubleshooting, we need to clarify what Mac this is--you have conflicting information in your post: PowerMac G5 and Mac OS 10.6. No PowerMac can run mac OS 10.6 or higher.
If it is really running 10.6 he has a Mac Pro, not a G5 PowerMac--very different computers inside. A quick check visually may help: a Powermac G5 has one optical drive slot; the similarly designed early Mac Pro has two drive slots.
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Aug 23, 2014 3:10 AM in response to Allan Jonesby Lawzenth,Hello, sorry for the late reply.
This model only has one optical drive slot.
He had a power issue with it where the screen would flicker like it wasn't getting enough power so he took it into a shop.
They ran it for a day each with 2 different power cables and found that his was not performing as it should so gave him a new one.
It worked in the shop exactly as it is plugged in now.
When you start it up it has a strange beeping sound or tone which may be the start up tone but it sounds a bit weird.
It also runs very loud.
Cheers,
Luke.
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Aug 23, 2014 10:25 AM in response to Lawzenthby BDAqua,Older meanings...
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.