UPGRADING REPAIRING PCs

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Contents
Hard Disk Drive Troubleshooting and Repair 135
Optical Drive Interface Types 137
MS-DOS Command-Line Access to CD-ROM Drives for
Reloading Windows 137
Troubleshooting Optical Drives 138
Failure Reading a CD 138
Failure Reading CD-R and CD-RW Disks in a CD-ROM
or DVD Drive 139
IDE/ATAPI CD-ROM Drive Runs Slowly 139
Trouble Using Bootable CDs 140
5 Floppy, Removable, Tape, and Flash Memory
Storage 143
Floppy Drives 143
Where Floppy Drives Fail—and Simple Fixes 144
The Drive Cover 144
The Stepper Motor 144
Interface Circuit Boards 145
Read/Write Heads 145
Floppy Drive Hardware Resources 145
Don’t Use a Floppy Drive While Running a Tape
Backup 146
Disk Drive Power and Data Connectors 146
Floppy Drive Troubleshooting 148
Common Floppy Drive Error Messages—Causes and
Solutions 149
Removable Storage Drives 150
Sources for “Orphan” Drive Media, Repairs, Drivers,
and Support 153
Emergency Access to Iomega Zip Drive Files in Case of
Disaster 153
Troubleshooting Removable Media Drives 154
Types of Flash Memory Devices 155
Tape Backup Drives and Media 155
Common Tape Backup Standards 155
Travan Tape Drives and Media 156
Proprietary Versions of Travan Technology 157
Getting Extra Capacity with Verbatim QIC-EX Tape
Media 157
OnStream ADR Tape Drives and Media 158
Choosing the Best High-Performance Backup
Technology 159
Successful Tape Backup and Restore Procedures 160
Tape Drive Troubleshooting 161
Tape Retensioning 164
6 Serial Ports and Modems 165
Understanding Serial Ports 165
Pinouts for Serial Ports 166
Current Loop Serial Devices and 25-Pin Serial Ports
168
UARTs 169
UART Types 169
Identifying Your System UART 170
High-Speed Serial Ports (ESP and Super ESP) 171
Upgrading the UART Chip 171