IBM CORPORATION          9/29/87                NSC
TIME OF DAY PROBLEM PS/2 M50/60, ERROR CODE 162/163
DOS 3.30 BACKUP.COM REPLACEMENT.

Recently, our customer surveys and ongoing quality testing
have revealed a problem on some IBM Personal System/2 Model
50 and 60 equipment.  This problem has resulted in
unnecessary planar replacements.

The problem is usually due to an inaccurate BIOS reset of
the time of day clock, and is not due to planar failure, as
the diagnostics suggest.

On the model 50, the clock might have an inaccurate date
and/or time after power on.  On the model 60, the power on
self test may display "ERROR CODE 162/163".  Either
condition is caused by an inaccurate reset of the clock by
BIOS after certain operations.

A System Software update has been developed that eliminates
this problem.  This update is available at all Authorized
Service locations in a Service Update to be mailed the week
of October 5, 1987.  The update is also available in a file
on the bulletin board called DOS33FIX.ARC.  (In addition to
the above mentioned update, DOS33FIX.ARC contains an updated
version of DOS 3.30 BACKUP.COM that resolves a multiple
subdirectory backup problem.)

In the interim, users can circumvent the problem by entering
the current date using the DOS DATE command immediately
before turning the system off.  Installation of the System
Software update will eliminate the problem as well as the
need for this extra step.                                                     