Texas Instruments Extensa 660 Series - Page 82

5-22 Troubleshooting Procedures
Figure 5-6 HDD Interface Troubleshooting Diagram
5
BIOS Setup O.K.?
Enter Correct HDD type
or Auto to Setup Item
Hard Disk properly
formatted?
Use DOS FDISK
program and Format
Check HDD Power
Check U605 (9956)
Pin3=5V
Check HDD Data Bus
PIN 36, 37, 38, 39, 50,
51, 52, 53, 62, 63, 64,
END
Yes
No
Yes
Yes
No
No
No
Check HDD Address
Bus
Check U13
Pin688, Pin69, Pin70,
HSA0, HSA1,HSA2
Yes
Yes
No
Hard Disk
Check U13
65, 71, 72, 73, & 74
System Fails to Boot:
HDD Interface Checks