Re: Apple IIe I/O error Troubles

[Rubywand <rubywand@swbell.net>]

classacom@ibm.net wrote:
> 
> Having had my Apple IIe since 1983, it's really become a member of the
> family...but unfortunately now it's sick.
> 
> Long ago I upgraded the unit so it was the "enhanced" version.  It has 3
> floppy drives... 2 - drives that are the 2 Disk ][ models(In slot 6) and
> 1 - which I use the most is the UniDisk 3.5 model -- in slot #5.
> 
> I also have a 8 Mghz "Zip" chip and a 1 Meg of ram via a Ramworks card.
> 
> I first thought my UniDisk 3.5 was suddenly malfunctioning, but on
> trying to boot off the Disk ][ in slot six, I get the same message.  I/O
> error.  All connections on drives have been checked
> 
> I am guessing I apparently have a chip that's bad, but have no idea
> where to begin in order to resolve this problem.

 ....

     The usual way to fix something like this is to ... 

mark cables with whiteout and disconnect disk drives. Disconnect
joystick, modem, monitor, ... .

Pull your Slot cards and take the time to brush off dust, clean card
contacts with alcohol swabs, and scootch-up and resocket each socketed
IC on each card and the motherboard.

Disconnect and re-connect motherboard cables- like the one to the power
supply.

Re-connect monitor and plug in 80-col card. Connect one 5.25" to the
Drive 1 position on the controller card and plug it into Slot 6 (taking
care that card contacts line up with Slot contacts).  Try powering ON
the computer and booting some known-good diskettes. ...


     The idea is to add pieces and check until something goes wrong. Or,
nothing may go wrong because the problem was a poorly socketed IC!



 
Rubywand