Mac Forum / General / Hardware / March 2008

I must confess I have never posted to this group but hopefully those
hear will be kind enough to steer me in the right direction. I'm not
incredibly tech savvy either so bear with me. I have a G4 500mhz AGP
tower at home that has been great. I bought it used about 3 years ago
and really love having a Mac at home. Anyway, as good as it has been I
thought it would be cool to replace the 15 year old Sony crt with a
new 22" Viewsonic LCD.

When I excitedly hooked up my new LCD monitor I discover that my G4
only had a 16mb graphics card. Needless to say it didn't support the
recommend resolution (1650 x 1080 I believe). No problem I thought,
I'll just upgrade the graphics card. So I bought a ATI Radeon 64mb
card to replace it. I did buy it off ebay but it was advertised as
new. i got the card installed and installed the ATI driver and
frimware update. Powered up and everything seemed good initially. I
was able to set it to the proper resolution. Anyway the problem now
seems to be the blacks out when trying to refresh. If I move from one
page to another in Firefox the screen will black out for about a
second. Is this a refresh rate problem, monitor driver needed, faulty
video card, needs more Ram? Any help is greatly appreciated.
Alex