Re: Apple IIgs motherboard problem

["Mark Cummings" <NOTfigjams@primus.com.au>]

I have had a similar problem with a ROM3, which turned out to be one bad
DRAM chip. As they are not socketed in either ROM1 or ROM3 you will need
someone to de-solder the chips and try them one at a time in a know good
card. IIRC I used a 4MB RAM card to swap the chips into with the right type
of DRAMs. But you will also need another working GS for this.

At least for a ROM1 you only have 6 DRAMs to worry about, the ROM3 has 10
IIRC.

Mark


"Roughana" <andrew.roughan@writeme.com> wrote in message
f6ab8a2f.0202100050.6858c5b2@posting.google.com">news:f6ab8a2f.0202100050.6858c5b2@posting.google.com...
> I have a IIgs Rom 01 motherboard that doesnt startup properly.
> When I turn it on, the screen comes up with a grey border, alternate
> vertical columns of black and green/purple/white lo-res blocks and the
> speaker clicks. Pressing Ctrl-OA[or CA]-Reset seems to be registered
> but the cycle continues.
>
> There is nothing plugged into the motherboard besides the monitor,
> keyboard and power supply. I have checked that these three components
> work fine with other motherboards.
>
> Any ideas what the possible problem is how to fix it?
>
> Thanks,
> Andrew