Fw: TwinAx Connection Problem only at Manual modes

From: c sl <ai_fans@xxxxxxxxxxx>
Subject: TwinAx Connection Problem only at Manual modes
To: midrange-l@xxxxxxxxxxxx
Date: Tuesday, 4 November, 2008, 11:00 AM
hi there,

i come across this somewhat odd case with a 820 machine.

It was successfully booted into D>M by my colleague and
was scratched up to only OS level. i then continued with
installation of Licensed Programs.


1. In B>N mode, no problem with twinax connection &
console display :-
The server was initially in B>N mode,but it was found to
have the issue of user ID locked during sign-on, after the
exisitng twinax controller at the back of system unit
connected to the 8-port twinax (MUX?) box.

2. In B>M or D>M, everytime IPL into either of these
2 manual modes, always the console seemed unable to obtain
signal from the existing twinax controller,with attention
light at display panel. Already set console to Address 0,
Port 0.

3. After replacing a twinax controller at the back of
system unit, console display back to normal when IPL into
manual modes.


my concerns are :-

- Why a 'intermittent-faulty' (is this the right
word to say?) twinax controller would caused attention light
& caused no signal to be transmitted to console ?

- How are the detailed IPL process at Manual mode (Attended
IPL) ?


hope u could shed some lights .. thx a lot..