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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Re: No sound, Control Panel unresponsive, Sudden reboots???
2011-12-31 by trickstar303
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