This sounds like the issue of Netscape opening up, but you can't see any
menu items, no icons at the bottom right, etc. Completely blank screen
for several minutes or more.
This is caused by having incorrect networking/routing happening on your
box. I can't tell you where your issue is precisely, because I can't
see your configuration.
When you get your routing correct, this will disappear, and your
Netscape will come on (correctly), in several seconds. My laptop is old
and fairly slow, 133mHz, and it takes about 15 seconds for it to come
up, assuming I have the setup configured correctly. It can take six
minutes or more, when things are mucked up.
When netscape is up and running, go into the preferences and set it to
either start with a blank start page, or a local page on your hard
drive. If it's a local page, be aware that incorrect networking/routing
will cause the same issue again.
To correct the issue, ensure that all pertinent data regarding
networking/routing is correct.
Additionally, you might want to eliminate the "*" Netscape splash
screen which has all of the "commercials". Locate the Netscape.ad
file on your system, open the file, seach within the file for the word
and you'll be at the line in this config file which you can change to
eliminate it's starting with the splash screen.