tlm@pur-phy (Timothy Lee Meisenheimer) (02/14/89)
I've had my 2000 for about 15 months now and since about 6 months ago I started using an interlaced workbench screen all the time. I have since noticed that the quality of the video varies considerably. I have a 2084 monitor,two floppies(but saw the problem when I had only one), and that's all - pretty generic. The video will be nice and scrisp (I have colors which I like and which help alot with the flicker), then it will jitter a bit and finally goes blurry. One set of raster lines (either odd or even ones - I don't know) stands out compared to the other set. Some of the solid fill areas - like that in the front and back arrangement gadgets get ghosted to the left. This seems to have gotten worse and is not dependent on how long AMY has been running - and sometimes will power on this way when the machine is cold. After a while the video will be cleaned back up and will look sharp again. When I first saw this happen I believe I tried re-seating all the chips but it did'nt seem to help. A few weeks ago I was visiting a friend with a similar set up (2000 & 2084) and happens to notice that his had gotten fuzzy too and then cleared up again. Do we both have bad chips? (His amiga is only about 6 months old.) Is this common? Has anyone had this problem and been able not make it go away for good? I don't relish the idea of writing my thesis with a blurry screen! Help! tim.
scotty@ziggy.UUCP (Scott Drysdale) (02/15/89)
In article <1972@pur-phy> tlm@newton.physics.purdue.edu.UUCP (Timothy Lee Meisenheimer) writes: >all - pretty generic. The video will be nice and scrisp (I have colors which >I like and which help alot with the flicker), then it will jitter a bit and >finally goes blurry. One set of raster lines (either odd or even ones - I don't >know) stands out compared to the other set. Some of the solid fill areas - >like that in the front and back arrangement gadgets get ghosted to the left. >After a while the video will be cleaned back up and will look sharp again. >tim. i've got the same problem with my 1084 and 1000 - i think it's the monitor. there is a related problem when NOT in interlace - i've got the screen shrunk down a bit (to the point where i can see the raster lines at the top) and it will occasionally jitter +/- one video line for a minute or so and go away. happens every few weeks without interlace, but in interlace i'm guaranteed ot see it within 10 minutes of use. when interlaced, the problem shows itself as the alternate scan lines overwriting each other with empty lines between the scanned lines. it's not the amiga - i used to run the 1084 off the RGB port and had a composite b&w monitor on the composite port and the 1048 would lose it, but the composite was steady as a rock. i've seen the same problem on a friend's magnavox monitor (the one that looks like a 1084). oh, it seems more likely to happen with less bright colors on the screen (which may explain the interlace problem - i tend to have very mellow colors for interlace). anyways, sounds like some kind of dc restoration problem in a sync circuit somewhere, and i don't do tv's. --Scotty
johnf@sag1.ssl.berkeley.edu (John Flanagan) (02/17/89)
In article <170@ziggy.UUCP> scotty@ziggy.UUCP (Scott Drysdale) writes: >In article <1972@pur-phy> tlm@newton.physics.purdue.edu.UUCP (Timothy Lee Meisenheimer) writes: >>...One set of raster lines (either odd or even ones - I don't >>know) stands out compared to the other set. Some of the solid fill areas - >>like that in the front and back arrangement gadgets get ghosted to the left. >>After a while the video will be cleaned back up and will look sharp again. >>tim. >i've got the same problem with my 1084 and 1000 - i think it's the monitor. > ... > --Scotty This problem was widely reported on the net last summer; I have it too (1084, A500). I took the monitor into the dealer to show them the problem. When I first turned it on in the shop, it displayed the problem for about five minutes, then cleared up. They held onto the monitor for a week, and the problem never showed itself again at their shop. The loaner they gave me for the week worked fine at my house. When I brought my monitor back home, it started acting up again. Oh well. I've found that putting a fan on the monitor usually helps. --John Flanagan --johnf@sag4.ssl.berkeley.edu
sanders@vax1.acs.udel.EDU (Robert M Sanders) (02/19/89)
I've had my Amiga since Christmas '87, and the only problem I've had with the
monitor is some jiggling of the picture. It usually stops if I make sure the
RGB cable to the monitor is plugged in all the way.
sparks@corpane.UUCP (John Sparks) (02/20/89)
I heard this Rumor:
I recently was told that the original 1084S monitors that were made by
MagnetBox have been blowing up left and right.
It seems that they were using a 400 line capable video tube and 200 line
capable video circuitry, tweaked to work the 400 line tube. A certain
capacitor is being overworked and generates lots of heat and will sometimes
blow. You will notice this by your picture blanking out and large ammounts
of smoke pouring from the top of your monitor. The new 1084D monitor
does not have this problem.
Now, I do not know if the above is true or not. It's just some talk that I
heard. Does anyone out there know if it's true? any comments from
commodore? Will CBM replace the monitor if it is the manufacturers fault
that it blows up?
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John Sparks // Amiga | {rutgers|uunet}!ukma!corpane!sparks
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