Re: Apple IIgs random hardware crashing - any ideas?

["Bill Garber" <willy4SPAM6pa@comXcast.net>]

"Ed Eastman" <ed@apple2.com> wrote in message
3F816FFC.8000803@apple2.com">news:3F816FFC.8000803@apple2.com...
> ToasterKing wrote:
>  > o Occasionally on power-up, a checkerboard pattern on video and no boot
> ...
>  > My hardware is set up as follows:
> ...
>  > - TransWarp GS accelerator in Slot 3, modified with v1.8 ROM, 14 MHz
>  > Sanyo-designed 65816, 32K cache SRAMs, 40 MHz oscillator for 10 MHz
>  > clock
>
> Turn it off all pieces of your IIgs system. Open the lid and touch the
> big metal box inside, then unplug the IIgs.
>
> Skootch up and then press down on the CPU connector for your transwarp
> accelerator and make sure it is seated properly to the motherboard's CPU
> socket.  All of this smacks of your accelerator not making a good
> connection to the CPU socket.

The one thing that was not mentioned in your troubleshooting
method or Ed's was checking for shrinkage of solder connections
of the CPU socket on the underside of the motherboard. I had a
Rom1 with similar difficulties that was remedied by removing
all the solder joints at the CPU socket and carefully resoldering
them. I believe, IIRC, the main culprits were CLK() and GND.
Good Luck.

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy4SPAM6pa@comXcast.net
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