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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!jvnc.net!adx.adelphi.edu!panther.adelphi.edu!shopsis
- From: shopsis@panther.adelphi.edu (Charles Shopsis)
- Subject: Video woes
- Message-ID: <shopsis.38@panther.adelphi.edu>
- Sender: news@adx.adelphi.edu (USENET News System)
- Nntp-Posting-Host: 192.100.55.183
- Organization: Adelphi University - Node: Boole
- Date: Fri, 20 Nov 1992 22:52:39 GMT
- Lines: 39
-
- I have been experiencing an intermittent computer video problem, and I don't
- know which of my components is responsible.
-
- My system is:
- 1. a Northgate 386 20 MHz computer with 4 Mb of RAM
- 2. an ATI VGA Wonder card with 512 K RAM (revision 1.03). This card
- came with 256 K of RAM; the additional 256 K was added about 2 years
- ago and has caused no problems
- 3. a Zenith 1490 flat screen monitor
-
- The problem(s):
-
- 1. When I start the system, particularly if its been off for several hours or
- overnight, the initial text on the screen indicating the BIOS and the memory
- check is sometimes enlarged, garbled and completely illegible. This malady
- appears before the hard disk has been read. If the boot is allowed to
- continue, no legible text appears on the screen. Re-booting sometimes
- results in thesame behavior, but eventually results in a readable VGA
- monochrome display. Turning the monitor off and then on again never helps,
- only a reboot (warm seems as effective as cold). Eventually, after several
- reboots, the system appears normal.
-
- 2. While running this apparently normal system in Windows 3.1 configured for
- 640 X 480 with 16 colors, there are rapid, transient flashes of color change
- on the screen, which then returns to normal. Sometimes, when I run a DOS
- program full-screen, the program behaves as if the computer is in EGA mode.
- When I run ATI's VCONFIG program (a utility that detects and sets the video
- mode), it indicates that the computer is in EGA mode, even though Windows
- was running in VGA. If I exit the DOS window and return to Windows, the
- Windows is in a different video mode, with text enlarged so that only part of a
- full-screen window is visible. If I then open up a DOS window, run VCONFIG,
- and reset the mode to VGA, and then return to Windows, things appear normal
- again (until the next time I run a DOS program, whether from a PIF or a DOS
- window, at which point the problem recurrs).
-
-
- Are these two problems related? Is it (or are they) due to the video card,
- tthe motherboard, the monitor, or an improper diet? Has anybody out there
- experienced anything similar?
-