Thanks Steve. Can someone point me to appropriate schematics or diagrams, finding a replacement crystal, and how to perform the surgery? TM
On Fri, Jul 4, 2025 at 9:01 AM Stephen Adolph <[email protected]> wrote: > it is suffering from excessive interrupt-itis. > > On Fri, Jul 4, 2025 at 8:58 AM Stephen Adolph <[email protected]> > wrote: > >> looks to me like the 32768 hz crystal is dead. >> >> On Fri, Jul 4, 2025 at 8:56 AM Thomas Morehouse <[email protected]> >> wrote: >> >>> Friday update: >>> >>> Batteries replaced with fresh AA alkalines yesterday (Thursday). Left >>> powered off overnight to recharge backup battery. Powered up this morning, >>> but no change. See attached screen photo. >>> >>> The screen clock seems to be working, but date never changes from >>> 1/1/1900. >>> Top four lines of screen appear normal, but below that, definitely not >>> normal. >>> >>> The "center" screen line consists of constantly changing characters. >>> Lowest screen line appears to be reiterations of "Bytes free" - without the >>> "Byt". >>> >>> None of the keyboard keys have any effect; when "cursor" is over BASIC, >>> hitting Enter changes nothing - screen remains unchanged. >>> >>> I've done several Cold Starts (CTRL+Pause/Break+Reset) and >>> (CTRL+Pause/Break+Power switch), but no apparent change. >>> >>> Note: when I do a Power On, the screen quickly shows the correct >>> original default M100 screen, then immediately changes to the garbled >>> screen. >>> >>> Onward through the fog! >>> Thanks. >>> Tom M. >>> >>
