Dell OptiPlex 755 User Manual page 346

Power Light
Blinks green several
times and then
turns off
Solid yellow
Blinking yellow
Solid green and a
beep code during
POST
Solid green power
light and no beep
code and no video
during POST
Solid green power
light and no beep
code but the
computer locks up
during POST
346
Solving Problems
Problem Description
A configuration error exists.
The Dell Diagnostics is running a
test, or a device on the system board
may be faulty or incorrectly installed.
A power supply or system board
failure has occurred.
A problem was detected while the
BIOS was executing.
The monitor or the graphics card may
be faulty or incorrectly installed.
An integrated system board device
may be faulty.
Suggested Resolution
Check the diagnostic lights to see if
the specific problem is identified (see
"Diagnostic Lights" on page 347).
If the Dell Diagnostics is running,
allow the testing to complete.
If the computer does not boot,
contact Dell for technical assistance
(see "Contacting Dell" on page 370).
See "Power Problems" on page 339.
See "Beep Codes" on page 350 for
instructions on diagnosing the beep
code. Also, check the diagnostic lights
to see if the specific problem is
identified (see "Diagnostic Lights" on
page 347).
Check the diagnostic lights to see if
the specific problem is identified (see
"Diagnostic Lights" on page 347).
See "Video and Monitor Problems" on
page 343.
Check the diagnostic lights to see if
the specific problem is identified (see
"Diagnostic Lights" on page 347). If
the problem is not identified, contact
Dell for technical assistance (see
"Contacting Dell" on page 370).