Page 78 - GIGABYTE Service Manual-v3.0-110101

Figure 5-5: FF/00 cause by others

5.2 No Boot - C1

C1 (Memory Presence)
- First block memory detect OEM Specific-Test to size on-board memory. Early chip
set initialization Memory presence test OEM chip set routines Clear low 64K of
memory Test first 64K memory.

- I/O channel activated.
- Initialize POST Error Manager (PEM).

5.2.1 C1 Repair Step

The Investigation step of debug card post C1:
(Include C1 reset, C1 lock up, C1-00, C1-01, C1-07, C1-25-C1, C1-26-C1, C1-33,
C0-C1 reset, Insert PCIE x 16 card show post code C1,)

Before the next step, make sure all the testing equipments are in good status. The step
below is suggestion, you don’t need to check step by step, but all signals must be
confirmed.
01. Voltage fails – DDR18V, DDRVTT, and CPU_M_VREF

02. Wrong BIOS or CMOS setting
03. SMBDATA or SMBCLK fail
04. Memory bus fail – MD, MA,
05. Clock fail- FSBSEL, DCLK

06. SB fail or other issues – A20M, ICHCLK14, and I/O fail, PCI express fail, VDD18,

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