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Epson Y16499100301 Diskette Problems, B-4, Troubleshooting

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1.Turn off the computer.

2.Connect the AC adapter to the computer and to an electrical outlet and let the battery charge for at least 12 hours.

3.Disconnect the AC adapter.

4.Turn on the computer, but do not insert a diskette and do not use the computer. Leave the computer in this condition for three hours. If the low battery (LOW BAT) indicator light comes on before the three hours are up, the battery is faulty. Take your computer to your dealer to have the internal battery pack replaced.

Diskette Problems

If you have trouble with a diskette, check the following questions:

1.Is the diskette damaged? Copy the diskette and repeat the operation that caused the problem using the copy. (If you have trouble copying the entire diskette, some of the sectors may be bad. Try to copy single files with the COPY command.) If the operation works using the copy, the original diskette is probably damaged. Make another copy to use as a backup.

2.Have you inserted the right type of diskette? The diskette type is normally shown on the manufacturer’s label. In the computer’s internal drives, which have a storage capacity of 720KB, use 3 +-inch, 720KB, double-sided, 135 TPI (tracks per inch), soft-sectored diskettes.

If you have a 5 $ -inch external diskette drive, use 360KB, double-sided, double-density, 48 TPI, soft-sectored diskettes in this drive.

3.Is the diskette write-protected? The write-protect switch may be set on a 3 + -inch diskette or there may be a write- protect tab over the notch of a 5 d -inch diskette. Before you move the switch or remove the tab, check the directory

B-4

Troubleshooting

Contents

Page IMPORTANT SAFETY INSTRUCTIONS Page Page IMPORTANT NOTICE DISCLAIMER OF WARRANTY COPYRIGHT NOTICE TRADEMARKS User’s Guide FCC COMPLIANCE STATEMENT FOR AMERICAN USERS Note: WARNING This Page Contents Introduction 1 Setting Up Your System 2 Preparing a Hard Disk for Use 3 Using the Equity LT 4 Using MS-DOSWith the Equity LT A Options and Maintenance D Performing System Diagnostics Equity LT Specifications Tables Introduction How to Use This Manual Page Setting Up Your System 1 Unpacking 2 Connecting the Screen Page Page Connecting the AC Adapter Charging the Battery Connecting a Printer Parallel interface Note Serial interface Setting Up Your System Setting the DIP Switches Keyboard DIP switches Table Keyboard Switch 1, LCD reverse or normal LCD Switches 2 and 3, LCD Back panel DIP switches DIP Switch 1, use of parallel 7 Turning On the Computer Turning on the power Adjusting screen contrast and brightness Setting Loading MS-DOS Page 9 Copying System Diskettes Copying with one diskette drive Page Running the Setup Program Setting the real-timeclock Changing the backlight period Changing the serial port (RS-232C)settings Page 300 bps 600 bps 2400 bps 4800 bps 38400 bps Leaving the Setup program Preparing a Hard Disk for Use Creating the MS-DOSPartition Formatting the MS-DOSPartition Page Copying the Reference Files to the Hard Disk Booting From the Hard Disk Drive Assignments Hard Disk Power Switch Using the Equity LT Using the AC Adapter Page LED Indicators Opening and Closing the Screen Using the Handle Selecting Execution Speed Resetting the Computer Caring for the Backlit Screen Special Keys on the Equity LT Keyboard Table 3-1.Special keys The Equity LT Character Set Using Disks and Disk Drives the Choosing diskettes for the Equity LT Caring for disks and disk drives Inserting and removing diskettes Write-protectingdiskettes Using a single diskette drive Turning Off the Computer Using MS-DOSWith the Equity LT Starting and Exiting MS-DOS Entering MS-DOSCommands Storing Data Changing the Default Drive Formatting Diskettes Formatting with one diskette drive Copying Data Copying with two 3 $ -inchdiskette drives Copying with one 3 f -inchdiskette drive the Page Copying with one 5 f -inchdiskette drive Using the COPY command wildcard Creating and Using Subdirectories Creating subdirectories Changing directories Using pathnames Starting an Application Program MS-DOSCommands and the Equity LT Using the backlit screen with memory resident programs Options and Maintenance Connecting a Color Monitor Replacing the Backlit Screen Element A-3 A-4 Options A-5 A-6 A-7 A-8 Turning Off the Hard Disk Turning off the hard disk first Turning off the hard disk later A-9 A-10 A-11 Troubleshooting Error Messages The Computer Fails to Start Up The LCD Screen is Blank The Monitor Screen is Blank The Computer Does Not Respond Low Battery Problems Diskette Problems Hard Disk Problems Software Problems Printer Problems Power-onDiagnostics System Device Check Clock and CMOS RAM Check RAM Check Keyboard Controller and Keyboard Check Floppy Disk Drive Seek Check Hard Disk Controller and Hard Disk Check Performing System Diagnostics Starting System Diagnostics Selecting a Test Resuming From an Error System Board Check Memory Check Keyboard Check Video Adapter and Display Check Video adapter check Attribute check Character set check 40-columncharacter set check 320 x 200 graphics mode check D-9 640 x 200 graphics mode check D-10 Screen paging check D-11 Color video check Sync check Run all above checks D-12 Floppy Disk Drives and Controller Check Starting the floppy disk drive check D-14 Sequential seek check Random seek check Write, read check D-15 Speed check D-16 Parallel Port (Printer Interface) Check Serial Port (RS-232C)Check Page Alternate Serial Port Check Dot-matrixPrinter Check Hard Disk Drive and Controller Check Write, read check Error detection and correction check Read, verify check D-22 Performing System Diagnostics Exiting System Diagnostics Error Codes and Messages D-25 Equity LT Specifications CPU and Memory Controllers Interfaces Power Supply Mass Storage Keyboard Environmental Requirements Characteristics Power Requirements Options Glossary Byte Character CMOS Code Command Data Data diskette Data length Default Delimiter Disk drive Diskette DOS Double-density Extension GW-BASIC Hard disk Hardware Hexadecimal Input/output (I/O) port Megabyte (MB) Memory Microprocessor Modem Monitor Parity Partition Peripheral Port Power-ondiagnostics Reset ROM Root directory RS-232C Sector Subdirectory Switch System diagnostics System diskette Target diskette Index Copying Page Page Page Page 10 Steps to Setting Up the Equity LT Page Reader Comment Card MS-DOS3.3 Reference Manual