Re: Did my Apple iiGS Die?

[kynrek <kynrek@gmail.com>]

On Nov 20, 1:03 am, "ict@ccess" <gids...@sasktel.net> wrote:
> On Nov 19, 10:11 pm, kynrek <kyn...@gmail.com> wrote:
>
>
>
>
>
>
>
>
>
> > On Nov 13, 5:53 pm, "ict@ccess" <gids...@sasktel.net> wrote:
>
> > > On Nov 13, 8:15 am, kynrek <kyn...@gmail.com> wrote:
>
> > > > On Nov 13, 6:13 am, "ict@ccess" <gids...@sasktel.net> wrote:
>
> > > > > On Nov 13, 1:30 am, kynrek <kyn...@gmail.com> wrote:
>
> > > > > > On Nov 13, 1:25 am, Vladislav Korotnev <vladkorot...@gmail.com> wrote:
>
> > > > > > > > Whiew!! Thanks guys, I will have my wife test when she gets home (I'm
> > > > > > > > out of town on business) I'll let you know how things turn out.
>
> > > > > > > So, were you able to test it?
>
> > > > > > Ok so unplugging all cables including keyboard except monitor did not
> > > > > > help. Removing ram card did not help cleaning the motherboard did not
> > > > > > help. Oddly enough if I plug my serial to USB adaptor into the 9pin
> > > > > > game port the system will boot! Is the screen supposed to have a blue
> > > > > > background? I want to fix the problem but I'm still clueless as to why
> > > > > > this fixes the problem. I have the motherboard removed from the case
> > > > > > and don't see any obvious issues. Any ideas?
>
> > > > > A blue screen happens when your computer gets reset to its factory
> > > > > defaults.  If you can boot with the serial to usb adapter, hold down
> > > > > the option key before power on.  If you are able to get into the
> > > > > control panel, you can check the settings.
>
> > > > > Did you have anything plugged into the game port when previously
> > > > > booting?  A way to check if the computer is sensing if the paddle
> > > > > buttons are being pushed even when there is nothing plugged in is to
> > > > > go into the system monitor with a "CALL -151" and type C060 or C061 at
> > > > > the the star prompt.  Any value greater than 80 indicates that the
> > > > > paddle buttons are in its pressed state.
>
> > > > > Rob
>
> > > > Ok I confirmed it was set to blue in the control panel
>
> > > > I ran c060 multiple times wile the adapter was plugged in and got:
> > > > FF
> > > > 80
> > > > A0
> > > > A0
> > > > FF
> > > > 80
> > > > A0
> > > > A0
> > > > 80
> > > > A0
> > > > A0
> > > > 80
> > > > E2
>
> > > > Then unplugged the adaptor and got:
> > > > A0
> > > > 80
> > > > 80
> > > > B0
> > > > A0
> > > > 80
> > > > 80
> > > > 80
>
> > > > C061 with adaptor:
> > > > 20-{
> > > > 20-L
> > > > 00-.
> > > > 20-.
> > > > 20-
> > > > 30-r
> > > > 20-
>
> > > > C061 without adaptor
> > > > 00
> > > > 7F
> > > > 00
> > > > 00
> > > > 20
> > > > 20-1
> > > > 00
> > > > 00
>
> > > My mistake.  The address was supposed to be C062 instead of C060.
> > > C061 is the softswitch for the Apple key which will go high ($80 or
> > > higher) when pressed and C062 is the Option key.  You can test this by
> > > holding the Apple key or Option key down on the keyboard just after
> > > typing in the address and before pressing the Return key.
>
> > > Since C061 shows a low number ($7F or lower), (a high number is needed
> > > to cause the self test to start), neither the keyboard or the adapter
> > > seems to be the cause of the self test.
>
> > C062 is giving the following readings
>
> > ff
> > ff
> > ff
> > ff
> > ff
> > a0
> > a0
> > 80
> > 80
> > a0
> > a0
> > a0-6
> > a0-.
> > a0
>
> A high number ($80 or higher) indicates that the computer is sensing
> that the option key is being pressed or held down or a paddle button
> is pressed.
>
> You did unplug all devices including keyboard and joystick/paddles and
> remove all cards with your last boot up test, correct?

Yes. Can anyone suggest which component to replace? Ic, capacitor,
resistor? I'm handy with a soldering iron but don't know which
component to replace. I posted pictures of the motherboard earlier in
the thread.