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From: sjf@reading.ac.uk (Steve Fisher)
Newsgroups: comp.sys.amiga.tech
Subject: B2000 screen loss on reset
Keywords: B2000, fatter agnes, NEC multisync II
Message-ID: <1499@onion.reading.ac.uk>
Date: 6 Jun 89 16:36:09 GMT
Organization: Reading University, UK
Lines: 26


 I have just upgraded from an A500 to a B2000 with 40M hard
disk and I am having problems at power up and reset with
loosing the screen display on the monitor.
  I have a NEC multisync II which worked fine when
connected to the A500. However when connected to the B2000
the screen goes completely on reset/power up after the
screen colour tests. ( ie. when the insert disk prompt
would appear ).
 The symptoms are such that the sytem is booting correctly
but the display has lost sync. I have tried powering up
with the monitor connected but switched off - same result.
 The only way to overcome this problem seems to be
disconnecting the monitor at reset/powerup and then waiting
a while and then reconnecting the lead at which point the
display is OK.
Is this something to do with Genlock detection & if so how
can I stop the B2000 falsely detecting a genlock signal ?
 By the way the B2000 is rev 6 with 1.3 ROM and appears to
have the 1M fatter agnes (8372A) with 1 Meg chip RAM.

 Thanks in advance for any help with this problem.
-- 
//  --   Steve Fisher   Micro. Unit. Computer Science Dept.
\\ |--        &                                      >  Reading University
//.||.   Shawn Fraser   Cybernetics Dept.