Howto get full SRC info

[Antonio Fernandez-Vicenti <afvaiv@xxxxxxxxxxxxxx>]

Folks, we've been having some problems upgrading from V5R2 to V5R3 ... 
(already 2 weekends, reverting back to V5R2...)
We reported getting SRC  :  B600F103  during Microcode loading , for 
which all available info seems to be meaningless.
IBM people have asked to repeat our "upgrade trial", even though we know 
it will again fail, so as to be able to "fully describe" our SRC, 
including not only the SRC itself, but also "words" 12, 13, ... thru 19.

I've been looking to some manuals (e.g. "Basic Systems Operations") and 
searched thru Google to find "detailed procedure to get word 12, 13, etc"
Lot's of places mention how important these additional words are... Some 
even mention  "some servers had leds displays that show even four words 
at a time", etc

But so far have not been able to find a place that really explains step 
by step how to display all those words...
Our system is a 820. Leds display only shows 8 hex digits.

When we get SRC  B600F103...
- do I just have to press the arrow "up" , then the white button to see 
word 12?
- same again for other words?
- or is arrow "down" and blue/gray button?
- or... which key sequence in detail?

I've never done this, and find really stupid asking what seems to be 
something that should be so clearly explained somewhere in a manual...

Any help? TIA