Sun Microsystems Netra t 1120, Service Manual

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iv Netra t 1120/1125 Service Manual • August 1998
3.2.2 To Verify the Baud Rate
3-3
3.3 To Initialize POST
3-3
3.4 Maximum and Minimum Levels of POST
3-4
3.4.1
diag-level
Variable Set to
max
3-4
3.4.2
diag-level
Variable Set to
min
3-14
3.5 POST Progress and Error Reporting
3-21
3.6 Motherboard Test
3-22
4. Troubleshooting Procedures
4-1
4.1 Power-On Failure
4-2
4.2 Disk Drive or Removable Media Drive Failure
4-3
4.3 Power Supply Test
4-5
4.4 SIMM Failure
4-8
5. Tool Requirements
5-1
6. Power On and Off
6-1
6.1 To Power On the System
6-2
6.2 To Power Off the System
6-3
7. Internal Access
7-1
7.1 To Attach the Wrist Strap
7-1
7.2 To Remove the Top Access Cover
7-4
7.3 To Replace the Top Access Cover
7-6
8. Power Subassemblies
8-1
8.1 Power Supply
8-1
8.1.1 To Remove the Power Supply
8-1
8.1.2 To Replace the Power Supply
8-5
8.2 ON/STBY Switch Assembly
8-6
8.2.1 To Remove the ON/STBY Switch Assembly
8-6
8.2.2 To Replace the ON/STBY Switch Assembly
8-8