Suggestion - Remove all power, connect a 1K resistor across the NiCd. Let it percolate overnight & remove the resistor, plug
it back in. On 12/3/18, Mauro Pintus <mau...@tiscali.it> wrote: > Unfortunately the unit is not working and yes I tried the cold start > (CTRL+PAUSE then Reset) without luck. > > Thanks > Mauro > > Sent from my iPad > > On 04/dic/2018, at 00:02, "John R. Hogerhuis" <jho...@pobox.com> wrote: > >> So is it working now? Did you do a cold start? >> >> On Mon, Dec 3, 2018, 2:57 PM Mauro Pintus <mau...@tiscali.it wrote: >>> Hi Mike, >>> I tried to replace the NiCd battery leaving the unit without battery >>> for few days and when I applied the new one I left it on charge without >>> turning on the unit for couple of days. >>> I think this should have cleared the garbage in the RAM :) >>> I also replaced most of the electrolitic capacitors and the voltage >>> levels are fine. >>> I managed to test also the LCD and it works correctly. >>> >>> Thank you >>> Mauro >>> >>> Sent from my iPad >>> >>> On 03/dic/2018, at 23:14, "Mike Stein" <mhs.st...@gmail.com> wrote: >>> >>>> Might just need a short rest and a cold boot; turning off the memory >>>> switch might well have scrambled the RAM contents. >>>> ----- Original Message ----- >>>> From: Mauro Pintus >>>> To: m...@bitchin100.com >>>> Sent: Monday, December 03, 2018 5:00 PM >>>> Subject: Re: [M100] Olivetti M-10's for a new home >>>> >>>> Hi Jan, >>>> i actually don't know for sure which component is preventing it to >>>> complete the boot. >>>> It was warking fine while accidentally I flipped off the NiCd battery >>>> switch. >>>> Now if I turn it on nothing appear on the display, I can just regulate >>>> the contrast... >>>> I tried to blindly write a basic loop to make it beep but it doesn't >>>> work. >>>> My hope was to have a working unit to use as a reference. >>>> I discussed this repair couple of time here in the list and several >>>> people provided so many useful informations. >>>> Non i know better my M10 but I havent identifyed yet the culprit. >>>> >>>> Checking some signals with the oscilloscope it looks like it is looping >>>> after a fix time without completing the boot. >>>> >>>> Francesco Messineo (another user of this list) wrote me in this days to >>>> offer some help and he suspect I damaged the RAM. Thank you again >>>> Francesco. >>>> I bought a desoldering iron and I hope in the next few days I'll find >>>> the time to try removing all RAM modules and fit one at a time in the >>>> first socket (hoping one module is still alive). >>>> >>>> Before I'll do this I was wondering if someone have a custom ROM that >>>> will test the RAM or other hardware peripherals providing some kind of >>>> feedback on a GPIO or something like that. >>>> >>>> Mauro >>>> >>>> BTW Francesco has a Youtube channel related to retro computer that worth >>>> mention: >>>> >>>> https://www.youtube.com/iz8dwf >>>> >>>> >>>> >>>> Sent from my iPad >>>> >>>> On 03/dic/2018, at 19:06, Jan Vanden Bossche <jan80...@yahoo.com> >>>> wrote: >>>> >>>>> Mauro, >>>>> >>>>> What do you need to repair your M-10? >>>>> >>>>> Greetings from the TyRannoSaurus >>>>> Jan-80 >>>>> >>>>> >>>>> From: Mauro Pintus <mau...@tiscali.it> >>>>> To: m...@bitchin100.com >>>>> Sent: Saturday, 1 December 2018, 16:12 >>>>> Subject: Re: [M100] Olivetti M-10's for a new home >>>>> >>>>> Thank you Jeff, really appreciated. >>>>> Now I keep my finger crossed :) >>>>> >>>>> Have a nice day >>>>> >>>>> Mauro >>>>> >>>>> >>>>> >>>>> On Dec 1, 2018, at 3:59 PM, Jeffrey Birt wrote: >>>>> >>>>>> Mauro, >>>>>> >>>>>> You have a need for them, so you should have them if the original >>>>>> person does not speak up. Fixing your machine is a better use. I have >>>>>> no specific need, just thought it would be neat to have a machine with >>>>>> AZERTY keyboard. >>>>>> >>>>>> Jeff_Birt >>>>>> >>>>>> From: M100 <m100-boun...@lists.bitchin100.com> On Behalf Of Mauro >>>>>> Pintus >>>>>> Sent: Saturday, December 1, 2018 7:50 AM >>>>>> To: m...@bitchin100.com >>>>>> Subject: Re: [M100] Olivetti M-10's for a new home >>>>>> >>>>>> I was soo exited I didn't see the other answer from Jeffrey, I'm >>>>>> sorry... >>>>>> Hope we can find an agreement, I'm really interested but I don't want >>>>>> bother anyone. >>>>>> >>>>>> Mauro >>>>>> >>>>>> >>>>>> >>>>>> On >>>>> >>>>> >>>>> >
