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- From: myers@hpfcso.FC.HP.COM (Bob Myers)
- Date: Tue, 19 Jan 1993 20:11:20 GMT
- Subject: Re: QUESTION: The R is out on my RGB monitor
- Message-ID: <7480168@hpfcso.FC.HP.COM>
- Organization: Hewlett-Packard, Fort Collins, CO, USA
- Path: sparky!uunet!usc!howland.reston.ans.net!zaphod.mps.ohio-state.edu!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpfcso!myers
- Newsgroups: sci.electronics
- References: <digdug.727455954@pv6f02.vincent.iastate.edu>
- Lines: 24
-
- >
- > What would be the most like cause of this problem?
- >
-
- Something died in the red video amplifier. I'm assuming you tried your
- computer with a different monitor, so that you know the red output is OK.
- I't possible, but much more unlikely, that the red gun is out in the CRT.
-
- The most likely thing, especially given that this is a new monitor, is that
- you experienced a CRT "flashover" (internal arcing, common during the first
- day or so of CRT life, esp. after it's moved) that took out the output
- transistor of the red amp. You might want to look for the simple things
- first, though - make sure that the internal video cable (if any) is still
- attached at both ends, and that the external cable (esp. if attached to the
- monitor) is OK. Wiggle the cables and see if the red flashes back on briefly.
-
- Diagnosing the fault in the video amplifier should not be attempted unless
- you know your way around high-voltage equipment with an oscilloscope.
-
-
- Bob Myers KC0EW Hewlett-Packard Co. |Opinions expressed here are not
- Systems Technology Div. |those of my employer or any other
- myers@fc.hp.com Fort Collins, Colorado |sentient life-form on this planet.
-
-