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- Newsgroups: comp.sys.att
- Path: sparky!uunet!gatech!gsusgi1.gsu.edu!gsusgi1.gsu.edu!regmad
- From: regmad@gsusgi2.gsu.edu (Michael de Kraker)
- Subject: Re: HELP 3b2 dead
- Message-ID: <regmad.715925401@gsusgi1.gsu.edu>
- Organization: Georgia State University
- References: <regmad.715623743@gsusgi1.gsu.edu> <1992Sep6.230135.26640@alf.cooper.edu>
- Date: Tue, 8 Sep 1992 04:10:01 GMT
- Lines: 36
-
- hak@alf.cooper.edu (Jeff Hakner) writes:
-
- >in article <regmad.715623743@gsusgi1.gsu.edu>, regmad@gsusgi2.gsu.edu (Michael de Kraker) says:
-
- >> Again I tried several terminals at all settings and have always been aware
- >> of the port requirements. The death of the 610 terminal may have been
- >> a clue. Possibly the console circuitry is fried on the 3b2 end killing my
- >> terminal or vice versa.
- >>
- >[...]
- >>
- >> I suspected this but wholesale replacement of the mother board is not fixing,
- >> it is replacing. I have no source for a mother board either. Where can I get
- >> one. Maybe it is the power supply what are the voltages and test points????
- >>
- >> Again thanks for the response to everyone but need suggestions for clues
- >> as to the system with solid power and diag led's.
- >Let's be clear here. Your apply power, move the power switch to ON,
- >then both the POWER and DIAG lights remain lit? Make sure that
- >the power light is not flashing in a repeating pattern. This is
- >what the 3B2 does when it concludes that the console is dead, or it
- >can't get to the point where it can display SELF CHECK.
-
- >Assuming that you get solid POWER and DIAG, try waiting a minute
- >or so, then hit the reset switch (in rear on 3B2/300,310,400).
- >If the floppy drive spins briefly, this is a good sign. Check
- >the console serial connection with a $10 RS232 LED breakout box.
- >You should see signal on Txmt and DTR.
-
- Just to continue the saga
-
- Power and diag lights on solid.. wait hit reset and nothing
-
- attach breakout box and no control signals.. period...
-
-
-