Re: Apple IIgs system errors

[Matthew Carlson <carlson@rahul.net>]

Faulty cap in the serial port hardware. Or try reseating all the chips on 
the motherboard, and cards. Or, it could be a diode (hehe).

Get a DMM (Digital Multimeter). Preferably made by Fluke.
Set it for Ohms testing. After you have unpluged your computer check all 
the caps around the serial port hardware. It is prabobly in some noise 
filter circuitry. If the Ohms meter stays around 10ohms or less you have a 
shorted cap. Replace it.

Diode checks are harder since you have to check them while in the 
circuit. But a shorted or open one is generally easy to find.



David Empson (dempson@atlantis.actrix.gen.nz) wrote:
: In article <3190576E.6F4C@washington.xtn.net>,
: Burton C. Bell <monolith@washington.xtn.net> wrote:
: > Hello.  I have an Apple IIgs that is giving me a bit of trouble.  When I 
: > do a system test (control-option-apple-reset)  I am getting a 
: > 
: > System Bad 06010000  error.  
: > 
: > Does anyone know what exactly this error may be?

: From the technical note (TN.IIGS.095):

: Self Test 6: Serial Test
:  
: AA =    06:
: BB =    01:  Register R/W
:         04:  Tx Buffer empty status
:         05:  Tx Buffer empty failure
:         06:  All Sent Status fail
:         07:  Rx Char available
:         08:  Bad data

: Thus it is getting register read/write errors trying to talk to the
: serial chip.

: This could indicate a problem with the serial chip itself, or
: elsewhere on the motherboard (the latter is more likely if you are
: getting other problems).

: Have you tried removing ALL cards (including the memory card and
: accelerator, if any), and repeating the self-test?  It could be a
: faulty card causing problems.

: > How can I go about getting my computer fixed?

: It may require a motherboard swap (get in touch with Alltech
: Electronics) if there is a serious problem.

: -- 
: David Empson
: dempson@actrix.gen.nz
: Snail mail: P.O. Box 27-103, Wellington, New Zealand