Lenovo 3797 User Manual
Page 33
1
Operator
information
panel
2
Diagnostic
LEDs
3
Release
latch
The
following
illustration
shows
the
controls
and
LEDs
on
the
diagnostics
panel.
Note:
Diagnostics
LEDs
remain
lit
only
while
the
server
is
connected
to
power.
A
checkpoint
code
(See
checkpoint
code
display
1 )
is
either
a
byte
or
a
word
value
produced
by
UEFI
and
sent
to
the
I/O
port
indicating
the
point
at
which
the
system
stopped
during
the
boot
block
and
Power-On
Self
Test
(POST).
It
does
not
provide
error
codes
or
suggest
replacement
components.
These
codes
can
be
used
by
Lenovo
Support
for
more
in
depth
troubleshooting.
v
Remind
button:
This
button
places
the
system-error
LED
on
the
front
panel
into
Remind
mode.
In
Remind
mode,
the
system-error
LED
flashes
once
every
2
seconds
until
the
problem
is
corrected,
the
system
is
restarted,
or
a
new
problem
occurs.
By
placing
the
system-error
LED
indicator
in
Remind
mode,
you
acknowledge
that
you
are
aware
of
the
last
failure
but
will
not
take
immediate
action
to
correct
the
problem.
The
remind
function
is
controlled
by
the
IMM.
v
NMI
button:
Press
this
button
to
force
a
nonmaskable
interrupt
to
the
microprocessor,
if
directed
to
do
so
by
service
and
support.
v
Check-point
code
display:
During
POST,
this
display
indicates
server
firmware
progress.
The
display
does
not
provide
error
codes
or
suggest
components
to
be
replaced.
Checkpoint
codes
can
be
used
by
Lenovo
Support
for
further
troubleshooting.
See
the
Hardware
Maintenance
Manual
for
more
information
about
checkpoint
codes.
Chapter
4.
Server
controls,
LEDs,
and
power
17