Clark Martin wrote: > Hal wrote: > >> Hi all. >> I'm new to the group, but have been a member of some of the other LEM >> groups for a while. >> I've been having a problem with my G5 Quad that I hope I can get some >> insight on. >> >> It's running 10.5.8, though this problem has been consistent across OS >> versions. >> When I restart the G5, it reboots fine, but there is no video. If I >> use screen sharing to log in from another computer, I can see that it >> booted fine, but it won't send video to the DVI port on the video >> card. >> >> This behavior is exhibited with several DVI displays (I've tried 3), >> including an APple 23" Cinema display. I've also tried 2 video cards, >> the original PCIe 6600, as well as a flashed Radeon X1900. >> >> If I tell it to shut down, and then start it up, it works fine. >> > When logged in remotely check System Preferences / Display and see what > video mode it's trying to display in (width x heighth and vert sync > speed). It's possible it is not one the monitor can display. Try > changing it to something you know the monitor can handle. > > Also check your PRAM battery, it may be dead or dying. > > > Clark is (as usual) correct. I would add that on many Macs (from the LC series through to G3 and G4 series) I've seen this behaviour shown when the PRAM battery is dead - most recently on our old G4 QS at work. Our IT guys (all Windows people) told the user it had a dead MoBo! I bought in a new 3.6v halfAA and bingo:- a fully functioning QS. Now they refer all Mac problems to me - or they will do, if any arise.
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