Dell OptiPlex 745c (Early 2007) - Manual (Page 116)

Error Messages
Fill out the Diagnostics Checklist as you complete these checks.
If the message is not listed, see the documentation for the operating system or the program that was running when the message appeared.
4-4-3 Math-coprocessor test failure
4-4-4 Cache test failure
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
A filename cannot contain any of the following characters: \ / : * ? " < > | — Do not use these characters in filenames.
A required .DLL file was not found — The program that you are trying to open is missing an essential file. To remove and then reinstall the
program:
1. Click the Start button, click Control Panel, and then click Add or Remove Programs.
2. Select the program you want to remove.
3. Click the Change or Remove Program icon.
4. See the program documentation for installation instructions.
Alert! Previous attempts at booting this system have failed at checkpoint [nnnn]. For help in resolving this problem, please note this
checkpoint and contact Dell Technical Support —
Contact Dell (see Contacting Dell ) and report the checkpoint code (nnnn) to the support
technician.
Alert! Air temperature sensor not detected — Ensure that all cables are securely fastened to the I/O panel and to the system board and
reboot your computer. If this does not resolve the problem, contact Dell (see Contacting Dell ).
Attachment failed to respond — See Drive Problems .
Bad command or file name — Ensure that you spelled the command correctly, put spaces in the proper place, and used the correct
pathname.
Bad error-correction code (ECC) on disk read — See Drive Problems .
Controller has failed — See Drive Problems .
Data error — See Drive Problems .
Decreasing available memory —
See Lockups and Software Problems .
Diskette drive 0 seek failure — See Drive Problems .
Diskette read failure —
See Drive Problems .
Diskette subsystem reset failed — Run the Dell Diagnostics (see Dell Diagnostics ).
Diskette write protected — Slide the write-protect notch on the floppy disk to the open position.
Drive not ready — Put a floppy disk in the drive.
Gate A20 failure —