Re: System Bad 01010001

[lemonherb1@netscape.net (Herbert Fung)]

"Mark Cummings" <NOTfigjams@primus.com.au> wrote in message news:<3d6cc210_1@news.iprimus.com.au>...
> If it is a RAM fault, and I suspect it will be by the checkerboard
> description, the board is certainly fixable.

This sounds OK

> I also got my first (and only) ROM-3 that was a no-goer.
> 
> The symptoms were:
> 1. Failed to boot.
> 2. No Post beep (from the speaker)
> 3. Random graphics on the screen. (I think they were flickering too, but
> can't remember for sure)

Exact symptoms I got.

> I did not get a System Bad error (or at least could not read the screen to
> see if there was one)
 
I did a OpenApple-Option-Ctrl-Reset to run the self diagnostic and
immediately it choked out the error.

> Also because the DRAMs are soldered onto a ROM-3, I would suggest you
> replace them with IC-Sockets as you go,

I've considered that at one point. Just curious though, if I replaced
the onboard RAM with faster memory chips, would it run any better? I
have some 70ns RAM chips on hand.