On Thu, 22 Apr 1999, Marko Mäkelä wrote: > On Wed, 21 Apr 1999, William Levak wrote: > > > As you change the values from their optimum level, the image begins to > > waver and distort. Getting farther away, you lose sync and the picture > > breaks up. Even further, and the driver circuitry (technically known as a > > ramp generator) ceases to respond to the signals and the screen goes > > blank. NONE of this damages the display in any way. > > What about the urban legends that one could damage a PC display by feeding > wrong line frequencies to it? I've heard of one friend's friend whose > monitor let the smoke out only after a few seconds of wrong signals. Has > anyone really seen a flyback transformer or some other component that has > fried because of out-of-specs frequencies? (Hmm, now when I think of it, > many PAL TVs keep a little noise when fed with an NTSC signal.) I tried my rather old (1995?) 17" IBM monitor with 120 Hz at 640x480 mode, so after five seconds or so I saw smoke which reached half a meter from the top of my monitor. I quickly turned off that thing and I was suprised the monitor worked after that just ok. =) Probably only insulating stuff burned a little. Name: Jan Gröndahl Email: jg@iki.fi GSM: 040-5631925 - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
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