IBM 5155 Manual To Operations page 39

If you are using a television or color display with your
mM
Portable Personal Computer, and its screen is
similar to the one below, screen alignment is required.
The procedures are explained in Section 2, "Problem
Determination Procedures." For now, continue with
"Summary" .
e IBM Personal Computer Basic
rsion CX.XX Copyright IBM Corp. XXXX
:XXX Bytes free
1ST 2RUN 3LOAD" 4SAVE" 5CONT 6LPTl 'JTRON 8TROH 9KEY OSCREEN
Introduction 1-27