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Mac Forum / General / Hardware / May 2006Problem with a G4/400 -- monitor resolution only 640x480?
Hi all... Staff member brought in a G4/400 for me to update to 10.4 and put some RAM in (it was running 10.2.8 before this...) Machine is *only* giving me a 640x480 resolution in the Display's system preference. And I'm pretty sure it was like this under 10.2.8, but I started updating it without really thinking about it. I hit the "reset" button on the logic board and reset the PRAM a number of times. And, yes, I updated the firmware on the CPU -- no help. But no luck. Still 640x480 -- even in OS 9.2.2 (which is odd as it *ought* to work there if nothing else...) Google isn't giving me any luck when I try to discover what might be options. Anybody have any clue here? I'm sure it's some video card/driver issue, but I've pushed the machine to 10.4.6 and it's still exactly the same. - Steve > I'm sure it's some video card/driver issue, but I've pushed the machine > to 10.4.6 and it's still exactly the same. I had that problem with a bent pin on my monitor cable. Straightened it out and I got all of my resolutions. That'd definitely be something to check. Greg B.  SignatureActual e-mail address is gbuchner and I'm located at mn.rr.com >> I'm sure it's some video card/driver issue, but I've pushed the machine >> to 10.4.6 and it's still exactly the same. [quoted text clipped - 4 lines] > > Greg B. I agree, it sounds like a sense line problem, the Mac thinks that it is connected to a monitor that can only support 640x480, try a different monitor, or if you have a monitor adaptor plugged in (D15 to HD15) then check it's switch settings, if it is an unswitched one then bin it and get one with switches. Ben. > >> I'm sure it's some video card/driver issue, but I've pushed the machine > >> to 10.4.6 and it's still exactly the same. [quoted text clipped - 11 lines] > get one with switches. > Ben. So... Not sure how this "fixed" it, but... I plugged my older Apple LCD monitor into the ADC port (DVI? Who can remember the acronyms...) Anyway -- *that* worked. I had all the resolutions. So, I shut down again, plugged the CRT back in -- same monitor -- same cable (no bent pins) and restarted again. Magically, all the resolutions were there for the CRT. And I *had* plugged and replugged the VGA monitor in dozens of times... Go figure. - Steve |
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