AT&T PC 6300 - Page 10

Service Manual
Problems That May Occur in a One/Two Hard Disk
Configuration 5-39
Hard Disk Unit 5-99
Parallel Printer Test ^ . 5-105
8087-2 Math Co-Processor — ... 5-109
Mouse 5-112
Mouse Test 5-114
8530 Serial Port Test 5-118
Video Option Board Test 5-125
Second Hard Disk Unit 5-135
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Placing Low-Level Format and Bad Track Mapping on the
Hard Disk • 5-41
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 ^
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TROUBLESHOOTING WITH SYSTEM
test •• ••• 5-54
Motherboard 5-55
Random Access Memory (RAM) 5- •
Determining Faulty RAM Chips 5-
Keyboard S-Oi'
Video System — ..... 5-73
Parallel Port 5-88
Serial Port Test (Using 8250) 5-91
Mini-Floppy Disk Drive 5-94 pj
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Video Option Board (Display Enhancement ^
Board) 5-121 ^
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