Welcome to LinuxCNC.org

Maybe the video circuit is kaput?

It's a pity that I don't have a SATA hard disk with a functioning Linux system on it - they're either IDE or SCSI drives. So I can't use them to test the HDD LED. And the SSD is, of course, blank. What a nuisance.

I realised as soon as I'd posted my last message that I did of course have PCI SCSI and IDE controller cards, so I went and retrieved them, plus one of each disk. I could only find the IDE cable and I have a nasty suspicion that the SCSI cable went out with a whole lot of other stuff in a desperate attempt to do some tidying in what I laughingly call my workshop.

So I went with the IDE card and disk. The disk made some awful noises, but it at least demonstrates, along with the fan, that there is power in parts of the MB other than the standby circuit. No it doesn't! The power is coming straight off the PSU! So no idea if the PCI card is working either. Plugging an LED into either the MB or the PIC card (either way round) doesn't result in anything.

AlexN wrote:Does the monitor wake from sleep?

That's an interesting question. I'll have to plug it back into the G5 to find out, but I suspect that it would. I'll try it and see.

Well. THe monitor goes to sleep when the system (OS X 10.5.8) tells it to, and wakes up when I tell it to. And it also wakes up OK when after the system puts the computer to sleep. The "no signal" message appeared on both occassions just prior to sleep mode. But the important thing is that it woke up.

It's pretty safe to say that the monitor is fine - it does what it is told to do by working hardware. You could therefore argue that (part of) the D525 hardware is not working, although that's not necessarily the case.

The size of the little 12 " screen reminded me a bit of the old Mac LC . A bit bigger than the Mac Plus or SE. That's going back about twenty years...

I've run out of ideas - not that I had many to begin with - as to what the problem might be other than frizzled hardware. I think I'm going to have to take the board back to where I got it in town (Sydney CBD) - and that's not going to be fun. They were exceedingly hard to deal with, and not just because they spoke very little English.