Path: utzoo!attcan!uunet!lll-winken!lll-lcc!lll-tis!helios.ee.lbl.gov!nosc!ucsd!ames!amdahl!lfk From: lfk@amdahl.uts.amdahl.com (Lynn Kerby) Newsgroups: comp.sys.amiga Subject: CBM 1084 monitor problems (was SONY monitor giving problems) Keywords: 1084 interlace garbage Message-ID: <94J9R3caSH1010uGymc@amdahl.uts.amdahl.com> Date: 5 Jul 88 22:55:17 GMT Organization: Amdahl Corporation, Sunnyvale, CA Lines: 65 [To refresh some memories, here is a summary of what has been posted on the subject of monitor problems ] In Article 21455 of comp.sys.amiga: >(1) In article <590@viscous> brianm@sco.COM (Brian Moffet) writes: >> I have an Amiga 1000 which I bought way back in 1986 (Jan). >> It has 512K RAM, 2 floppies, and a SNOY KV-1311CR >> TV/Monitor. Every now and then, I notice that the interlace >> is not handled very well. The odd lines look fine, but it seems >> the interlaced even lines are half-3/4 intensity. Perhaps this >> is my way of getting EXTRA_HALFBRIGHT ? :-) >> >> If I turn off the computer and wait a while, then things seem >> to go back to normal. Has anyone seen this before? Any ideas on >> what might be causing it? > >(2) In article <3892@cbmvax.UUCP> grr@cbmvax.UUCP (George Robbins) writes: >> Sounds like some bizarre problem with the Denise chip... > >(3) In article <557@osupyr.mast.ohio-state.edu> vkr@osupyr.mast.ohio-state.edu (Vidhyanath K. Rao) writes: >> I have a 500 + 1084. Every once in a while, the display seems to use the >> same data for two scan lines. A colon will look like a | with a small >> hole in the middle. This is too transient to figure out what is going on. >> But occurs at least once every time I turn the machine on. > >(4) In article <34140@amdahl.uts.amdahl.com> lfk@amdahl.uts.amdahl.com (Lynn Kerby) writes: >> I seem to have just the opposite problem with my 500+1084, and I am >> pretty sure it is the monitor's fault. After I have had my monitor >> on for about 15 minutes, one set of scanlines drops out for about >> 15 minutes. I leave the 500 on all the time, so the only thing that >> has to deal with warm-up is the 1084. I always run interlace on the >> WB screen, and this is a real pain in the *ss (I get half of the display >> data and all the flicker - making it just about unusable until it >> warms up). >> >> Anyone else out there seen something similar with 1084's? > >I have a lemon500 + 1084. (However, I started to like my 500.) >1084 always make strange noises, and it also has the problem (4). >Sometimes the lower half is perfectly Ok, and only the upper half >has the problem of dropping one set of scanlines. > >Is it really the problem of 1084 ? or the Denise chip ? > >Has anybody had this problem fixed by sending 500 or 1084 to a repair shop ? > >H.Tsukada >Dept.Math. >Rurtgers U. Now to add to it once again. I just purchased a 2000 and the same thing happens as I posted above (number 4). If this is a strange problem with the Denise chip (as suggested by grr above), it must be a very common problem! Is someone from CBM looking into the problem as a 1084 problem? Sounds (and looks) to me like the problem is that the 1084 is a lemon. -- Lynn Kerby - Amdahl Corporation Sunnyvale, CA ...amdahl!lfk lfk@uts.amdahl.com Disclaimer: Any and all opinions expressed herein are my own and do not necessarily represent the views of anyone, especially my employer.