Stephen/Doug, thanks for the tips, I will get it back on the test bench and run through the power circuit.
I found a PDF of the service manual on the site, so will crack that open and see what I can find out. Thanks again, Ryan Sent from my iPhone > On Jun 27, 2016, at 10:00 PM, Doug Jackson <[email protected]> wrote: > > Ryan, > > I have had an intermittent in my M100 for the last 10 years that is similar > to this. From memory, I found an issue with the -5V supply that was causing > the issue. > > When it is faulty, open the case, and check the supply voltages. > > Do you have the M100 Service manual? > > Doug > > >> On 28-Jun-16 2:23 PM, Ryan Fransen wrote: >> I have confirmed it reads 4.06 volts after approx 24 hours after being >> unplugged from roughly a 24 hour charge. What is weird, is after the >> suggestion of reseating socketed connections, (I only found one IC with a >> socket) and after reseating it, it booted up fine every time for ~10 times, >> now back to the issue. Of note, when the issue reappeared after working >> those 10 times, when continued off-on finally succeeded once, I noticed the >> date time was reset. During those 10 successful startups however the clock >> was not reset, as expected. >> >> Sent from my iPhone >> >>> On Jun 27, 2016, at 9:11 PM, Stephen Adolph <[email protected]> wrote: >>> >>> might be worthwhile to just check the voltage on it... make sure the >>> battery is able to hold a charge at 3.6V and is not a bad battery. >>> sounds like you keep getting ram corruption. >>> >>>> On Mon, Jun 27, 2016 at 11:03 PM, Ryan Fransen <[email protected]> wrote: >>>> Good call on the reseat, I will do that as a good measure. >>>> >>>> Yes, I've replaced the nicad and have charged overnight, though I haven't >>>> done anymore troubleshooting to confirm operation of the nicad circuit. >>>> >>>> Sent from my iPhone >>>> >>>> On Jun 27, 2016, at 7:53 PM, Lee Kelley <[email protected]> wrote: >>>> >>>> In your first post you said you replaced the internal battery, I assume >>>> that >>>> was the soldered in place ni-cad. The next step that I would do is to >>>> disconnect every connector be sure the contacts are clean and re insert it. >>>> This might be all that's needed. This should include any socketed chip as >>>> well. >>>> >>>> Lee >>>> >>>>> On Mon, Jun 27, 2016 at 9:34 PM, John R. Hogerhuis <[email protected]> >>>>> wrote: >>>>> >>>>> >>>>> >>>>>> On Monday, June 27, 2016, Ryan Fransen <[email protected]> wrote: >>>>>> >>>>>> Lee, though this trick certainly did work, it seems this needs to be >>>>>> repeated each time. Once turned off, then back to square one. Something >>>>>> else odd, is that the trick appears to work only ~50% of the time, >>>>>> whereas >>>>>> just turning off and on, will not result in anything more than the solid >>>>>> pixels. >>>>>> >>>>>> Sent from my iPhone >>>>> The m100 had an internal nicd battery. Normally units I get off eBay have >>>>> to sit plugged into the wall wart overnight before they function properly. >>>>> >>>>> It could also be that your nicd is shot and needs to be replaced. You >>>>> could check the voltage across it after letting it charge. >>>>> >>>>> -- John. >>>> >>>> >>>> >>>> -- >>>> "I will never in my lifetime make a film that cannot be seen by the whole >>>> family" Arther P. Jacobs > > -- > Doug Jackson > > Dougs Word Clocks.com Pty Ltd > > www.dougswordclocks.com >
