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Message

Re: No sound, Control Panel unresponsive, Sudden reboots???

2011-12-31 by trickstar303

Hi Ryan-

I actually have the Main Debug Rom Chip (.1.0), which I bought on Ebay a few years ago just in case I might need it. I never used it, so I'm not sure how to go about it...any help is appreciated. 

George
P.S. Happy New Year


--- In emulatorII-list@yahoogroups.com, Ryan Supak <ryansupak@...> wrote:
>
> For testing RAM, I've also had very good luck with the Debug EPROM. You can
> download the ROM itself from this site, and if you get to the point where
> you need help getting the Debug to run, post back here. I'll help out in
> any way I can.
> 
> rs
> 
> On Sat, Dec 31, 2011 at 2:37 AM, Mike <mrjdevries@...> wrote:
> 
> > **
> >
> >
> > I also would measure the voltages on the PS.
> >
> > But I'd suspect faulty RAM.
> > It may be the ram that runs the operating system.
> > (I've seen the exact same fault.. EII loads disk then crashes, and it was
> > a bad RAM IC)
> >
> > It may not be the ram that is bad, but it could be a poor connection.
> > (ie, reseat ALL the ram)
> >
> > The service manual mentions what IC's of RAM run the OS.
> > And you can swap that bank with the sample RAM freely. (bad sample ram
> > will have a distorted sound but the EII will still work)
> >
> > Personally, after measuring the PS, I'd just go ahead and gently lift each
> > IC up a few mm then press down. Then if that doesn't work, get hold of the
> > memory test disk (or if you have HxC, an image of it)
> >
> > Mike
> >
> > Sent from my Apple ][e
> >
> > On 31/12/2011, at 12:46 PM, "trickstar303" <trickstar303@...> wrote:
> >
> >
> >
> > Hi,
> >
> > My EII was working fine until today, when I fired her EII up after a pause
> > of 2 months. It'll boot the disk just fine and the LCD displays the name of
> > the loaded program. But there is no sound at the outputs, the control panel
> > is completely unresponsive when any buttons are pushed and it will start to
> > reboot randomly.
> >
> > I opened her up and tried to push all ICs and ribbon cables etc, but it
> > didn't help.
> >
> > Does anyone know what these symptoms could be?
> >
> > George
> >
> >   
> >
>

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