Re: Did my Apple iiGS Die?

[Michael J. Mahon <mjmahon@aol.com>]

"ict@ccess" <gids.rs@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?

I'm suspecting ESD damage to that input...

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon