^ Mr. non.noob [without any offence] please read above at http://www.wiredpakistan.com/forums/viewtopic.php?pid=159464#p159464
I already have described the same scenario as of rokra. It's what how it works and when it works. It was for shlazz's problem as he tried to explain. And if as your problem is also, you said, to be the same. Then again the problem could be with your 7600 Graphics Card..
About BIOS I guess this is fine to keep it at auto. disabling the IGP would result in no display at all your. Either of your Graphics Adapter wouldn't work if 7600 doesn't work while having the IGP disabled. Otherwise toggling in the BIOS would not harm any thing so you can also try switching the options in selecting the Graphics Adapter..
This is totally understandable that if your Computer is giving output to the IGP even when the 7600 Card is already in the slot then it means there is some problem with your 7600 card, or the slot, or the motherboard itself.
But most probably the problem is due to your 7600 card...
I just noticed one thing in your problem that your 7600 card gives the display until the it gets to the Windows Starting Logo... That is the stage where your drivers gets loaded for windows. If that really is. you can also give a try to restore your windows to an earlier restore point. also it's possible that your drivers are not good any more.
If you still want to check your card, you should check that card on other machine or check a new one on your machine. As you mentioned that you aren't using that card for a month now that means perhaps you are using IGP continuously so if you are OK working with the IGP then what's the point you are trying to look for... ??
Just try the card on an other machine if you want to check it... Just get a new card if it's found to be faulty, or else you might need your motherboard be examined.
I hope you know now, what you have to do next...
PS.... They just didn't add the fan into the Graphics Card for a show.. It does a job for you to keep your card cool... Removing the fan from it can really cause damage to the components on it... which lasts it at a not-working-state... I have done it as well one of my older cards which just worked good for couple of days onwards and then gone dead. I do such things only when I know the life of a thing has been over with me and I need a new one..