Video Display Not Supported message

S

Schwann240

Registered
I have a PowerMac G4 running Tiger 10.4.6, and a Samsung SyncMaster 192N monitor. Yesterday, I changed my display preference from 1152 X 870, 75 HZ, to 1024 X 768, 85 HZ. As soon as I did that, the screen went black and a bouncing box appeared with the message Video Display No Supported. Now, no matter what I try, I cannot get the monitor display to work. I zapped the PRAM twice. I can boot in safe mode (which is where I am right now) and the display is the original 1152 X 870 75 HZ, but if I boot regularly, I still get the bouncing box with the Video Display message.
Any ideas, anyone?
 
Try changing the resolution while still in Safe Boot mode.
Use the native resolution for your display, which is 1280 x 1024
Seems that 85 Hz is not an available sync, so try to use nothing more than 75 Hz.
Restart normally after that change.
Try to change the resolution after the restart.
Keep in mind that only the native resolution will give you the sharpest image.
Don't change the sync freq to anything larger than 80Hz.
If the display simply goes black, you can usually revert at that time by pressing the escape button on your keyboard.
 
Thanks. This worked, partially. I was able to change the res to 1280 x 1024 in Safe boot mode and successfully reboot normally, and it held that resolution. but as soon as I change the resolution to any other setting (staying at 75 hz), it goes back to the black screen with the "video not supported" message, and pressing escape did not have any affect at all.
 
A friend helped me figure this out; in addition to what you suggested, we also trashed a preference file found in the library/by host folder (a com.apple.windowserver...plist file) and after that, things worked normally again.
 
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