On Fri, Apr 06, 2012 at 09:17:15AM -0700, Richard C. Steffens wrote: > This seems to be my week for hardware issues. > > I have been running two monitors for a few months. One is a Samsung > SyncMaster 712N. The other is a ViewSonic BG2030wm. A couple of days ago > the ViewSonic started blanking briefly, but then was okay. Then it > developed the jitters -- a shaking of the image left to right, but over > a very short distance. Powering off and back on fixed it a couple of > times, but then the jitters returned constantly.
Could be connector noise - what you are seeing is horizontal sync not getting through. Try reconnecting the video cable, and look for corrosion on the cable pins. Inside the monitor, it could be dust, or more corrosion on internal connectors. Beyond that, it is unlikely that you will fix it, unless you board-swap with another identical Viewsonic with different problems (like bad pixels or a burned-out backlight). But I'm betting on connector corrosion. We've had a lot of rain, your office may be higher humidity than normal, so this is a likely time of year for corrosion problems to appear. Hot times of year, dust/ventilation/heat problems are more likely. Very cold times of year, furnace cycling, blower motor starts, and voltage sags can bollix electronic power supplies. Leaving equipment on for months, then turning it off for a couple of weeks of vacation, will also stress power supplies (moisture bakes out, then re-enters). Manufacturers are plating connectors with just enough corrosion protection to make it across the Pacific, not enough to last very long here in the Pacific NorthWet. In a consume-and-throwaway culture, most people just have a tantrum, discard their old electronics and buy new, with more pixels and megabytes and useless features. Please dispose of your used planet in the nearest trash receptical. Keith -- Keith Lofstrom [email protected] Voice (503)-520-1993 KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon" Design Contracting in Bipolar and CMOS - Analog, Digital, and Scan ICs _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
