Dell Diagnostics; When To Use The Dell Diagnostics - Dell OptiPlex 755 User Manual

decoding circuitry in the
Short!
memory has occurred.
The hard drive is not
C: Drive Error
working or is not
configured correctly.
C: Drive
Failure
The cache memory is not
Cache Memory
operating.
Bad, Do Not
Enable Cache
An error is occurring on the
CH-2 Timer
timer on the system board.
Error
The system configuration
CMOS Battery
information in the system
State Low
setup program is incorrect
or the battery charge may
CMOS Checksum
be low.
Failure
CMOS System
Options Not Set
CMOS Display
Type Mismatch
CMOS Memory
Size Mismatch
CMOS Time and
Date Not Set
Drive A or B is present but
Diskette Boot
has failed the BIOS POST.
Failure
Error in the DMA controller
DMA Error
on the system board.
DMA 1 Error
DMA 2 Error
The BIOS cannot
FDD Controller
communicate with the
Failure
floppy drive or hard drive
controller.
HDD Controller
Failure
An interrupt channel on
INTR1 Error
the system board failed to
POST.
INTR2 Error
The operating system
Invalid Boot
cannot be located on drive
Diskette
A or drive C.
The BIOS has detected a
Keyboard Error
stuck key.
An error occurred with the
KB/Interface
keyboard connector.
Error
The operating system
No ROM Basic
cannot be located on drive
A or drive C.
Dell Diagnostics
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

When to Use the Dell Diagnostics

If you experience a problem with your computer, perform the checks in this section and run the Dell Diagnostics before you contact Dell for technical
assistance.
It is recommended that you print these procedures before you begin.
NOTICE: The Dell Diagnostics works only on Dell™ computers.
Enter system setup (see Entering System
Ensure that the hard drive is installed
correctly in the computer (see the "Drives"
section for your computer) and defined
correctly in the system setup program (see
System Setup).
See Contacting Dell for instructions on
obtaining technical assistance.
See Contacting Dell for instructions on
obtaining technical assistance.
Enter the system setup program (see
System Setup), verify the system
configuration, and then restart the computer.
Ensure that the drive is installed correctly in
the computer (see the "Drives" section for
your computer) and defined correctly in the
system setup program (see
Check the interface cable at both ends.
The keyboard or system board may need to
be replaced.
Ensure that the floppy drive or the hard drive
is installed correctly in the computer (see
"Drives" section for your computer) and
defined correctly in the system setup
program (see System Setup). Check the
interface cable at both ends.
The keyboard or system board may need to
be replaced.
Enter the system setup program (see
System Setup) and confirm that drive A or
drive C is properly identified.
Ensure that nothing is resting on the
keyboard; if a key appears to be stuck,
carefully pry it up. If the problem persists,
you may need to replace the keyboard.
Ensure that nothing is resting on the
keyboard; if a key appears to be stuck,
carefully pry it up. If the problem persists,
you may need to replace the keyboard.
Enter the system setup program (see
System Setup) and confirm that drive A or
drive C is properly identified.
Setup), review your computer's configuration information, and ensure that the device you want to test displays in
System Setup).