Page 5 - GIGABYTE Service Manual-v3.0-110101
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4.2 POWER SEQUENCE ................................................................................................................... 44
4.3 CLOCK CHECK .......................................................................................................................... 48
4.3.1 Clock EN Signal Check ..................................................................................................... 48
4.4 PWOK SIGNAL CHECK .............................................................................................................. 49
4.5 PCI_RST SIGNAL CHECK ............................................................................................................ 50
CHAPTER 5 NO BOOT ....................................................................................... 51
5.1 NO BOOT-FF/00 ...................................................................................................................... 51
5.1.1 FF/00 Cause by -CPURST .................................................................................................. 52
5.1.2 FF/00 Cause by Bus Data ................................................................................................. 53
5.1.3 FF/00 Cause by Voltage ................................................................................................... 54
5.1.4 FF/00 cause by Others ..................................................................................................... 55
5.2 NO BOOT - C1 ......................................................................................................................... 56
5.2.1 C1 Repair Step ................................................................................................................. 56
5.2.2 DDR18V Fail .................................................................................................................... 57
5.2.3 CPU_M_VREF Fail ........................................................................................................... 58
5.2.4 DDRVTT Fail .................................................................................................................... 59
5.2.5 GTLREF1 Fail ................................................................................................................... 60
5.2.6 CPU_VDDR12 Fail ........................................................................................................... 61
5.2.7 BIOS or CMOS Setting Error ............................................................................................ 62
5.2.8 SMBDATA or SMBCLK Fail ............................................................................................... 63
5.2.9 Memory Bus Fail ............................................................................................................. 65
5.2.10 Clock Fail .................................................................................................................... 66
5.2.11 SB Function Fail .......................................................................................................... 67
5.2.12 Other Fail ................................................................................................................... 69
5.3 NO BOOT AND POST CODE C3-07 ............................................................................................... 70
5.3.1 No Boot and Post code 25 ............................................................................................... 72
III
