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Epson Equity 486DX2/50 PLUS User Manual - Page 169

Keyboard Problems

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Keyboard Problems If you are having trouble with the keyboard, check the following: 1. If the screen displays a keyboard error message when you turn on or reset the computer, make sure the keyboard is securely connected to the computer. See "Connecting the Keyboard" in Chapter 1 for instructions. 2. If the cursor keys do not work properly, the num lock function may be on. When num lock is on, the keys on the numeric keypad work only as numbers. If the Num Lock indicator in the upper right corner of the keyboard is lit, press [G] to turn off the function. If you want to change the initial setting of the num lock function, see "Using the Keyboard and Speaker Options" in Chapter 2. 3. If nothing happens when you type on the keyboard, see "The Computer Does Not Respond," above. 4. If you still have trouble with your keyboard, run the keyboard diagnostic tests described in Appendix C. B - 1 4 Troubleshooting

Section	Page
FRONT MATTER	1
CONTENTS	9
INTRODUCTION	14
Optional Equipment	15
Operating Systems and Other Software	15
VGA Utilities	16
How to Use This Manual	16
Where to Get Help	18
CHAP 1-SETTING UP YOUR SYSTEM	19
Choosing a Location	19
Removing the Protector Card	21
Connecting a Monitor	21
Using the VGA Interface	22
Using a Display Adapter Card	24
Connecting a Printer or Other Device	25
Using the Parallel Interface	25
Using the Serial Interface	27
Connecting the Keyboard	28
Connecting the Mouse	29
Connecting the Power Cord	31
Turning On the Computer	32
Turning Off the Computer	34
CHAP 2-RUNNING THE SETUP PROGRAM	35
Automatic Configuration	36
Starting the Setup Program	36
Continuing From an Error Message	38
Moving the Cursor Block	40
Setting the Display Adapter Type	40
Setting the Power-on Password	43
Setting the Extended Memory Caching	45
Setting the Processor Speed	47
Setting the Keyboard and Speaker Options	49
Setting the Real-time Clock	51
Setting the Hard Disk Drive Configuration	54
Hard Disk Drive Types	58
Setting the Diskette Drive Type(s)	61
Setting the Serial/Parallel Interfaces	62
Reviewing Your Settings	64
Leaving the Setup Menu	66
CHAP 3-USING YOUR COMPUTER	68
Installing MS- DOS or Another Operating System	68
Copying the Reference and Utility Files	69
Locking the Computer’s Cover	70
Special Keys on the Keyboard	70
Stopping a Command or Program	72
Resetting the Computer	72
Using a Power-on Password	73
Changing a Power-on Password	74
Deleting a Power-on Password	75
Preparing the Hard Disk for Moving	76
CHAP 4-ENHANCING SYSTEM OPERATIONS	77
Using AUTOEXEC.BAT and Other Batch Files	77
Changing the Processor Speed	78
Entering Keyboard Commands	80
Using the ESPEED Program	81
Reassigning the Diskette Drives	83
Using the AFDD Program	84
Using Your Computer as a Network Server	85
Using a Password in Network Server Mode	87
Using Expanded Memory Beyond 640KB	88
Using Special VGA Features	89
CHAP 5-ACCESSING INTERNAL COMPONENTS	91
Special Precautions	91
Removing the Cover	92
Removing the Front Panel	94
Removing the Subassembly	96
Replacing the Subassembly	98
Replacing the Front Panel	100
Replacing the Cover	101
Post-installation Setup	102
CHAP 6-INSTALLING AND REMOVING OPTIONS	104
Main System Board	106
Jumper Settings	107
Option Cards	111
Installing Option Cards	113
Removing an Option Card	115
Memory Modules	116
Installing Memory Modules	117
CHAP 7-INSTALLING AND REMOVING DRIVES	123
Using the Correct Drive Bay	124
Setting the IDE Hard Disk Drive Jumpers	125
Changing the Jumper Settings	126
Installing or Removing a Drive in the External Bay	128
Installing a Drive	128
Removing a Drive	134
Installing or Removing a Drive in the Internal Bay	136
Removing a Drive	137
Installing a Drive	138
Connecting the Cables	140
APPENDIX A-PHYSICALLY FORMATTING A HARD DISK	143
Choosing the Type of Format	144
Formatting a New Disk	145
Reformatting a Used Disk	146
Selecting an Option	146
Starting the Formatting Process	146
Option 1, Format	147
Modifying the Defective Track Table	149
Formatting the Disk	150
Option 2, Destructive Surface Analysis	151
Option 3, Non-destructive Surface Analysis	154
Exiting the Hard Disk Format Menu	155
APPENDIX B-TROUBLESHOOTING	156
Identifying Your System	156
Error Messages	157
The Computer Won’t Start	160
The Computer Does Not Respond	161
Restoring the Power Supply	164
Password Problems	165
Removing a Password	166
Setting a New Password	168
Keyboard Problems	169
Monitor Problems	170
Diskette Problems	172
Diskette Drive Problems	174
Hard Disk Problems	175
Installing the Drive	175
Preparing the Drive	176
Accessing Data on the Drive	177
Software Problems	178
Printer Problems	179
Option Card Problems	181
Mouse Problems	182
Using the MOUSE7PT.EXE Program	182
Memory Module Problems	184
Math Coprocessor Problems	185
APPENDIX C-PERFORMING SYSTEM DIAGNOSTICS	186
Starting System Diagnostics	187
Selecting an Option	189
Modifying the Device List	190
Selecting a Test	191
Resuming From an Error	192
Error Messages	195
APPENDIX D-SPECIFICATIONS	199
CPU and Memory	199
Controllers	200
Interfaces	200
Power Supply	201
Keyboard	202
Power Source Requirements	203
System Memory Map	204
GLOSSARY	205
INDEX	224
PRINTER DIAGRAM	231