4120 Views 5 Replies Latest reply: Nov 9, 2009 11:21 PM by Jay Eneberg2
From this information from my system profile:
ATI Radeon 7500:
Chipset Model: ATY,RV200
VRAM (Total): 32 MB
Vendor: ATI (0x1002)
Device ID: 0x5157
Revision ID: 0x0000
ROM Revision: 113-91701-222
Resolution: 1440 x 900 @ 60 Hz
Depth: 32-bit Color
Core Image: Software
Main Display: Yes
Quartz Extreme: Supported
Status: No display connected
I take it that OS10.5.5 is detecting my Viewsonic VA1912w Screen connected to the VGA; but for some reason has decided that there is NO display (my HDTV via HDMI) connected to the ADC.
I've been playing with this for a day or two now. With both screens attached and powered on I power on the G4. The grey "boot up" screen with the Apple logo and spinning wheel appears on the HDTV screen, meaning the Mac has found it and is using it. While this is happening the Viewsonic is grey.
Then both screen go black, the Viewsonic goes blue, then puts up an old desktop picture, while the HDTV remains black. And that's all that happens.
I have to disconnect the HDMI cable from the HDTV, power down the HDTV & the Mac, then power on the Mac again to get it back.
So why would the Mac detect the HDTV, then decide it's not there?
I've tried adjusting the display settings and frequencies to no avail.
Yes the TV has a VGA input, and I did test that worked.
And the HDTV instruction manual does give a list of resolution settings when connecting the HDTV to a computer via a HDMI cable. And as it does work when booting up, couldn't understand why it wouldn't work once up.
For the moment I've connected the ADC to DVI adaptor to the small monitor via a spare DVI cable and the VGA port on the Mac to the VGA port on the HDTV. Both screens are working, but now I have a hum/crackle on the Mac's audio output when ever the HDTV is connected. Weird.