Dell OptiPlex 755 - Manual (Page 199)

See Sound and Speaker Problems .
Problems writing to an optical drive
Close other programs —
The optical drive must receive a steady stream of data during the writing process. If the stream is interrupted, an error occurs. Try closing all programs before
you write to the optical.
Turn off standby mode in Windows before writing to a disc —
See Power Management for Windows XP and Windows Vista or search for the keyword standby in Windows Help and Support for information on power
management modes.
Hard drive problems
Run Check Disk —
Windows XP:
1. Click Start and click My Computer.
2. Right-click Local Disk C:.
3. Click Properties® Tools® Check Now.
4. Click Scan for and attempt recovery of bad sectors and click Start.
Windows Vista:
1. Click Start and click Computer.
2. Right-click Local Disk C:.
3. Click Properties® Tools® Check Now.
The User Account Control window may appear. If you are an administrator on the computer, click Continue; otherwise, contact your administrator to
continue the desired action.
4. Follow the instructions on the screen.
E-Mail, Modem, and Internet Problems
Check the Microsoft Outlook® Express security settings — If you cannot open your e-mail attachments:
1. In Outlook Express, click Tools® Options® Security.
2. Click Do not allow attachments to remove the checkmark, as needed.
Check the telephone line connection
Check the telephone jack
Connect the modem directly to the telephone wall jack
Use a different telephone line —
l Verify that the telephone line is connected to the jack on the modem (the jack has either a green label or a connector-shaped icon next to it).
l Ensure that you hear a click when you insert the telephone line connector into the modem.
l Disconnect the telephone line from the modem and connect it to a telephone, then listen for a dial tone.
l If you have other telephone devices sharing the line, such as an answering machine, fax machine, surge protector, or line splitter, bypass them and use
the telephone to connect the modem directly to the telephone wall jack. If you are using a line that is 3 meters (10 feet) or more in length, try a shorter
one.
Run the Modem diagnostic Tool —
Windows XP:
1. Click Start® All Programs® Modem Helper.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: Connect the modem to an analog telephone jack only. The modem does not operate while it is connected to a digital telephone network.
NOTE: Do not plug a telephone cable into the network adapter connector (see the I/O connector information for your computer).