PROBLEM: No signal on monitor when I boot up?????????

This might be an obvious question MN, but....take a look at the back of your graphics card. For instance, I have 2 BFG 7900GT OC's and EACH card has 2 DVI inputs on the back. Now if you look at the card, there may be a number beside each dvi input. ..# 1 and # 2....these are for hooking up AND running 2 monitors at the same time.

If you have your monitor hooked up to input #2, that may be why it is not "seeing" your monitor. Think of it as input #1 being the "master" input and #2 is for the second monitor.What if ther are no numbers on the back of the card? Well gemerally, if you are looking at the back of your case with the card installed, the MASTER input should be the one on the LEFT.

I hope this helps if you haven't tried it already.

One other trouble shooting tip would be to get the monitor drivers DIRECTLY from Viewsonic's website and install them as well.
Hook up a standard crt monitor with a crt adapter and try that to see if it's not your dvi connector.

Antec P180 Performance Case
SeaSonic S12 600w PSU
Asus A8N32 SLI S-939 (bios 1103 V02.58 )
RealTek 97 Onboard
ATHLON 64 X2 4800+ Toledo Core (AMD v 1.3.1.0/MS hotfix/ Dual Opt)
2 G's of Corsair 3500LL Pro @ 400Mhz 2-3-2-6-1T
2- BFG 7900 GT OC in SLI (NV 91.31)
WD RAPTOR 74.3 G's / XP Home / SP2 & Apps
Maxtor SATA II 250 G's /Gaming / Movies / MP3's
Maxtor SATA II 250 G's /backup (unplugged)
Sony CDrom 52X
Plextor 708-A DVD/CD rom
Razer DiamondBack Optical mouse
Logitech Z-5500 Dolby Digital 5.1 THX 500w

CASE: Antec P180b

Tried both DVI connections many times still "no signal"