AT&T PC 6300 - Maintenance

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5
MAINTENANCE
fl GENERAL 5-5
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Troubleshooting 5-5
^ Replacing Faulty Modules 5-5
! Reminders 5-6
TROUBLESHOOTING WITHOUT SYSTEM
TEST 5-7
System Will Not Power Up Normally 5-7
System Load Check on Power Supply 5-9
Short Isolation Procedure 5-19
Display Check 5-26
Mini-Floppy Disk Unit Check 5-28
Two Mini-Floppy Disk Units 5-28
One MFD Unit and One HDU 5-33
System Will Not Access Hard Disk '5-36
Hard Disk Problems 5-38
n Problems That May Occur in a One/Two Hard Disk
Configuration . 5-39
Placing Low-Level Format and Bad Track Mapping on the
n Hard Disk 5-41
I Partition Hard Disk for MS-DOS 5-45
Formatting the Hard Disk 5-47
Hard Disk Unit "Not Ready" on Cold Start ; ^ . 5-50
Resident Diagnostic Error Messages 5-51
TROUBLESHOOTING WITH SYSTEM
TEST 5-54
Motherboard 5-55
Random Access Memory (RAM) 5-59
'i j Determining Faulty RAM Chips 5-65
5-1