Help diagnosing boot issue SWTPC 6800

Brad H vintagecomputer at
Mon Jan 1 16:17:54 CST 2018

I had that happening on mine.. came down to a bad RAM board.

Sent from my Samsung device

-------- Original message --------
From: Nick Allen via cctalk <cctalk at> 
Date: 2018-01-01  10:32 AM  (GMT-08:00) 
To: cctalk at 
Subject: Help diagnosing boot issue SWTPC 6800 

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.

Thanks in advance!


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