X windows

Please help.
I recently upgraded my Red Hat Linux 7.2 to 7.3 on an IBM Netfinity 5000 server and since then I can’t get X Windows again.

The VGA card is an S3 86c775/86c785 Trio 64V2/DX
X Server :XF86_S3

Monitor Probing Found;
Visual Sensa Monitor With Hor. Sync Range 30-70 KHz and Vert. Sync Range 50-160 Hz.

Do You Think I Should Upgrade again to 8?