Blank screen for dual monitor support, bad PSU or Bad Video card

2 computers (X,Y) X is intel 478 1GBram 80 GBHDD (celeron 2.6) 200W PSU ATIradeon 9200(PCI), can get multy monitor on this system. Y is same litlle newer 2GBram 80&40GB HDDs (p4 3.0GhzHT prescott)  300W ATIraeon 9550(AGP) cant get dual monitor. onboard wont work if card plugged in.  2nd monitor plugge in with DVI-VGA Adapter.  it gets power but screen is blank.  ATI cat and windows recognizes both monitors but can't get video to display on 2nd.  I really ont want to buy a psu if I don't need one.... will  try plugging in 9200 PCI into Y tonight if it works then don't think its power supply (cuz it will be powering to vieo cards) anyone know what may be my prob...Also noticed when enabling in windows, screen resolution says it is 1024,0 (should be 1024,768)  lights are green on both monitors. when 1st monitor goes to standby second monitor follows.... Please before I lose all my hair... anyhelp?....

nfarrow7 years ago
try turning down the hz rate and changing the resolution. and then reboot the computer.