IBM Personal Computer XT Manual To Operations page 186

15
Did the screen change from white to black when
the Power switch was set to On? (The screen
may remain black for only 13 seconds before
changing again.)
YES - Go to the next step.
NO - Have the display serviced.
16
Wait for the power-on self test (POST) to finish.
The IBM Personal Computer BASIC message,
with a blinking cursor, appears unless a diskette
is inserted or an operating system is
automatically loaded from a fixed disk drive.
The IBM Per.onal Computer Baaie
Veraion CX.XX Copyright IBM Corp. XXXX
XXXXX Byte. free
Ok
ILIIT 2f1UN nOAO"
48AV~"
tiCONT ILPTI 1TRON ITROfF
'K~V
OICRUN
9000-6 Test
April 1984