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- Newsgroups: comp.sys.att
- Path: sparky!uunet!destroyer!gatech!gsusgi1.gsu.edu!gsusgi1.gsu.edu!regmad
- From: regmad@gsusgi2.gsu.edu (Michael de Kraker)
- Subject: Re: HELP 3b2 dead
- Message-ID: <regmad.715623743@gsusgi1.gsu.edu>
- Keywords: 3b2 boot
- Organization: Georgia State University
- References: <regmad.715453158@gsusgi1.gsu.edu> <1992Sep3.194154.505@kopachuk.uucp>
- Date: Fri, 4 Sep 1992 16:22:23 GMT
- Lines: 83
-
- dcb@kopachuk.uucp (David Breneman) writes:
-
- >In article <regmad.715453158@gsusgi1.gsu.edu> regmad@gsusgi2.gsu.edu (Michael de Kraker) writes:
- >>Help Help Help:
- >>
- >> Currently it just sits there both power and diag lights
- >> light but no flashing and no firmware prompt.
- >>
- >> Heres what happened:
- >>
- >> Hit big red switch to on
- >> Wait Wait Wait ( get impatient )
- >> Hit big red switch to Standby
- >> Console prompt flashes on screen init level 0 begins
- >> System shuts down by self.
- >> Hit big red switch and does not come up power and diag led light.
- >>
-
- Perhaps I should be clearer her the system was acting normally when I
- hit the switch to standby.... The system has not come up since.
-
- >Did you try pushing the reset button several times when the Diagnostics
- >light comes on? That sould get it into firmware mode.
-
- Yep an nothing no garbage or anything.
- The power and diag lights come on no flashing hard disk spins up and then
- NOTHING!!!!! no firmware no UNIX.
-
- >It's a little
- >vague what you mean by "Console prompt flashes on screen init level 0
- >begins". Do you mean that you get the message "INIT: new run level 0"
- >(not sure of exect wording - but you know it if you see it) or do you
- >merely get a flickering of the cursor? If you just get a flickering
- >of the cursor, the console port baud rate may have been changed.
-
- Yes I got the message once just before the system shutdown as a result
- of the my impatience and hitting the switch to standby.
- The word Flashes was meant to portray the fact that after I hit the
- big red switch to standby, the system came up and right back down.
-
- >Cycle your terminal
- >through all its baud rates and see if you can get something intelligible
- >to some up. The best way to do this is to change the speed on the
- >terminal, press the reset button a couple times and see if anything
- >comes up on the screen. If not, try it at another speed. If you
- >eventually get a repsonse at a speed other than 9600, then you know that
- >that is the problem. With the machine in firmware mode, when it asks
- >program to run enter "baud". It will them prompt you for the correct
- >speed. Enter it (9600), change your terminal back to 9600 and reboot
- >the machine.
- >>
- >> The only result was I felt that the main board runs hot
- >> which may be normal. One coincidene is that the ATT 610
- >> terminal appears to have died along with the 3b it will
- >> rcv but not xmit. It was not used as the console during
- >> death of the 3b2 but was used subsequently. May be a clue.
- >>
- >Well, make sure you're using a working terminal!
- >*Necessary* settings for a 610 used as the console are:
- > SPEED 9600
- > SEND PARITY NONE
- > LOCAL ECHO OFF
-
- 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.
-
- >> Again any advice or sources for parts and service at a reasonable
- >> rate would be greatly appreciated.
-
- >Worst case scenario is it's the mother board. You can get these used
- >for a couple hundred bucks. It sounds, however, like a failure to
- >communicate :-) . Probably console set up wrong, bad cable, or wrong
- >baud rate on the console port.
-
- 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.
-
-