Texas Instruments Extensa 660 Series Maintenance Manual page 82

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