Page 80 - GIGABYTE Service Manual-v3.0-110101

5.2.3 CPU_M_VREF Fail

Example: AMD
M56S-S3 identified by:

01. Post code C1.
02. CPU_M_VREF fail
03. SR19 broken

MA78G-DS3HP identify by:

01. Post code C1.
02. CPU_M_VREF fail
03. SBC31 impedance fail (only 2 ohm)

Signal Explanation:
CPU_M_VREF is DRAM Interface Voltage Reference for CPU.
Because CPU_M_VREF was fail, so memory bus cannot work correctly and post code
C1.

Figure 5-7: CPU_M_VREF Fail Check

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