Dell OptiPlex 740 - Manual (Page 55)

Quick Reference Guide
55
Diagnostic Lights
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions located in the Product Information Guide.
Solid yellow The Dell Diagnostics is
running a test, or a device
on the system board may be
faulty or incorrectly
installed. If the Dell Diagnostics is running,
allow the testing to complete.
See "Diagnostic Lights" on page 55
to see if the specific problem is
identified.
If the computer does not boot,
contact Dell for technical assistance.
For information on contacting Dell,
see your online
User’s Guide.
Blinking yellow A power supply or system
board failure has occurred. See "Diagnostic Lights" on page 55
to see if the specific problem is
identified.
See "Power Problems" in your online
User’s Guide.
Solid green and a
beep code during
POST A problem was detected
while the BIOS was
executing. For instructions on diagnosing the
beep code, see "Beep Codes" on
page 59. Also, see "Diagnostic
Lights" on page 55 to see if the
specific problem is identified.
Solid green
power light, no
beep code and
no video during
POST The monitor or the graphics
card may be faulty or
incorrectly installed. See "Diagnostic Lights" on page 55
to see if the specific problem is
identified.
Solid green
power light and
no beep code,
but the
computer locks
up during POST An integrated system board
device may be faulty. See "Diagnostic Lights" on page 55
to see if the specific problem is
identified. If the problem is not
identified, contact Dell for technical
assistance. For information on
contacting Dell, see your online
User’s Guide.
Power Light Problem Description Suggested Resolution