> Hello again everyone! > > My Thunder II GX 1600 video card has developed a problem: > On the screen, I'm getting white vertical lines about a quarter-inch apart > that run across the entire screen. > The white lines are perfectly parallel and evenly spaced. > They resemble dotted white lines (not solid) and they're always there. > > At the "millions of colors" setting, there is also a strange > lavender/pinkish tint to the picture which flickers a little bit. > This pinkish/purple tint disappears when I change the setting to "256 > colors"... so the image colors are then normal... BUT the white lines are > still there! > > The only setting that makes the lines disappear is "Black & White". > When I set the video card to Black & White, the display looks normal. > > Can one of our resident experts please help me figure this out? > > Here's what I'm thinking could be the problem: > > 1. A bad VRAM chip on the video card > 2. A defect in the special adapter cable that this card uses > (13w3 to DB-15 adapter) > > I have ruled out any issues with the monitor (i.e. I've tested the card with > several different monitors, but the lines & pinkish tint are always there). > I have also tried the card in different NuBus slots, and in three different > Macs (Quadra 840av, IIci and Workgroup Server 9150). > Nothing helped. > > Please let me know what you think I could do. > I am experienced with test equipment and a soldering iron, so I could > replace a defective VRAM chip if only I could figure out how to tell which > chip is bad! > > If it's an issue related to the video cable (13w3 to DB-15) then I would > just replace the cable and be done with it! > > I eagerly await your replies - TIA! > > Greg Shafritz Hi I would remove and reseat the vram chips. In pairs
I sometimes get this with the formac card I have in my 6400 if the cable is knocked it unseats the card slightly a quick push down and the card is re-seated Lines disappear and back to normal. Also used to get it with the 840av I had that turned out to be bad vram. Vicki -- Quadlist is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Quadlist info: <http://lowendmac.com/lists/quadlist.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/quadlist%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
