fordke@ingr.com (Keith Ford x8614) (07/10/90)
I just put together a Jameco 80386-20. It has an ATI VGA1024 video card, Seagate ST277R-1 RLL hard drive, and an Adaptec (2732B?) hard/ floppy controller. The problem is anytime there is a lot of disk activity, like boot up, the video gets messed up. Looks like stray RF. I've narrowed it down to the card by swapping it with an older VGA Wonder I had. I'm curious if anyone has had this problem and found a solution. Any leads would be appreciated. Keith Ford. -- | ...!uunet!ingr!fordke | Micro Magic BBS (1:373/12 - 205/830-2362) | fordke@ingr.com | IBM/Apple2/Trackstar/Echoes/OBUL/ODIN | "and the Trees are all kept equal by hatchet, axe, and saw." -Rush
granroth@iowasp.physics.uiowa.edu (07/11/90)
In article <11438@ingr.com>, fordke@ingr.com (Keith Ford x8614) writes: > I just put together a Jameco 80386-20. It has an ATI VGA1024 video > card, Seagate ST277R-1 RLL hard drive, and an Adaptec (2732B?) hard/ > floppy controller. The problem is anytime there is a lot of disk > activity, like boot up, the video gets messed up. Looks like stray > RF. I've narrowed it down to the card by swapping it with an older > VGA Wonder I had. I'm curious if anyone has had this problem and > found a solution. Any leads would be appreciated. Keith Ford. Hmmm . . . I had noticed video interference during disk activity on several of our Gateway 2000 systems with the ATI VGA and ESDI cached controllers. I haven't taken the time to give Gateway a call about this yet, but it sounds like the same problem. (The interference is definitely noticeable, but not considered serious by the users.) -Larry Granroth@IowaSP.physics.UIowa.edu IOWASP::GRANROTH
nadkarni@ashok.nac.dec.com (ashok p. nadkarni) (07/11/90)
This information is second hand from a friend. It seems some of the ATI VGA Wonder cards shipped had a faulty SN74LS241N chip on board. Any kind of power supply noise or fluctuation (as when you access the hard disk), causes problems in the video display. The ATI boards have a WU or WC prefix (I'm not too sure about this). Sorry don;t have any more info. The machine my friend had was from Gateway but I imagine the same problem could exist in any ATI card. If you bought the machine from Gateway, give them a call. If you put it together yourself, you might want to give ATI a call. Let us know what happens. I have a ATI VGA myself though I have not seen this problem. /Ashok