Toshiba Satellite A10 Maintenance Manual page 74

2.4 System Board Troubleshooting
LED Status
01h
02h
03h
Satellite A10/TECRA A1/Satellite Pro A10 Maintenance Manual (960-445)
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Table 2-3 Printer port LED boot mode status (3/8)
Test item
Memory check
CMOS check and initialization
Resume branch check
(at Cold boot only)
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2 Troubleshooting Procedures
Contents
DRAM type and size check (at Cold boot)
If RAM size is "0", the program halts
SM-RAM stack area test
If the SM-RAM cannot be used as stack, the
program halts
Cache configuration
Permission of cache (L1/L2 cache)
CMOS access test (at Cold boot only)
If any error occurred, the program halts
CMOS battery level check
CMOS checksum check
CMOS data initialization (1)
IRT status setting (Setting of "Boot status" and "IRT
busy flag" and "0" to the remaining bits)
Storing of DRAM size
In the case of CMOS error, no resume occurs.
If "resume status code" is not set, no resume
occurs
Resume error check
S3 return error Resume error F17AH
SM-RAM checksum check Resume error F173H
Memory configuration change check
Resume error F173H
Checksum check of system BIOS RAM area
Resume error F179H
Checksum check of Expanded Memory
Resume error F176H
Checksum check of PnP RAM
Resume error F177H
To resume process (RESUME_MAIN)
Resume error process
Returns the CPU clock to "Low"
Prohibition of all SMI
Clears resume status
Returns to ROM
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