Help diagnosing boot issue SWTPC 6800

[Nick Allen]

I spoke too soon, I think simply cleaning the contacts rattled a short 
and dumb luck made it boot the first time.  By pressing the fatherboard 
I can see characters corrupt when running a program, guess I need to do 
some more digging to find out exactly where and why this is happening.


On 1/1/2018 5:34 PM, Nick Allen wrote:
> cleaning the connector pins with a brass brush solved the issue, 
> thanks everyone!!
>
>
> On 1/1/2018 5:03 PM, Nick Allen wrote:
>> Thanks for the tips everyone!  I can confirm power is GOOD, and the 
>> problem persists even without the RAM installed (Just CPU and MP-C or 
>> MP-S board).  I am going to clean the buss connectors and see if it 
>> helps!
>>
>> On 1/1/2018 12:32 PM, Nick Allen wrote:
>>> Hey everyone, Happy New Years!  I am thankful for an active 
>>> community that enjoys helping each other learn, and today I am 
>>> coming with an ask for help.
>>>
>>> I have a SWTPC 6800 and ADM3A terminal, I can get it to boot, and 
>>> when it boots it will continue to boot for several hours. But 
>>> getting it to successfully boot takes upwards of 100 power OFF and 
>>> ON cycles.  The other 99 times, I get a continuous stream of random 
>>> ASCII characters (see video link below). It's my first time seeing 
>>> this type of issue that happens intermittently, and wondering if 
>>> anyone has any insights in what might be causing this.  I suspect 
>>> its a faulty IC on the Processor board that resets or controls the 
>>> OS reset, will need to deep dive and diagnose, but thought I would 
>>> ask for some direction first.
>>>
>>> https://www.youtube.com/watch?v=Ci4vhPn-3PE
>>>
>>> Thanks in advance!
>>>
>>> -Nick
>>>
>>>
>>>
>>>
>>
>