New Lcd For Old G3


Last night I hooked up a new monitor to my old G3.
The settings were not correct so I went into the control panel and adjusted the monitor setting. This I did incorrectly and the display, and the old one, will not decipher the new setting and shuts off. I think it is 75 x 75. I can turn on the computer with the extensions off, but can not re adjust the display settings. Is there a way to do this?
Unknown information:
Specific Mac model - old G3 says nothing.
System / MacOS version.
Manufacturer and model number of 'new' monitor.

01. Plug in the old monitor.
02. Reset the PRAM / NVRAM.
1-Try resetting the Pram. Start holding these keys down until you hear three chimes;

Command-Option-P-R keys

2-Start up the computer with extensions off. To do this, hold down the Shift key when you turn on the computer until the message, "Extensions Off" appears.

3. After the desktop appears, drag these items from the Preferences folder (within the System Folder) to the Trash:

Display Preferences file
Monitor Preferences folder
preferences file for third-party resolution switching software, if installed

4. Restart the computer.
5. Set up the monitor's resolution as desired.