820-3662: 3 beeps

Before i start replacing the RAM chips, anything else to check? These are measurements i've taken so far. No corrosion or liquid damage on the board.

PP0V75_S3_MEM_VREFDQ_A - 0.68
PP0V75_S3_MEM_VREFCA_A - 0.68
PP1V35_S3_MEM - 1.36
MEM_RESET_L - 1.36
 

piernov

Moderator
Staff member
Voltage on PPVTT_S0_DDR, PP0V75_S3_MEM_VREFDQ_B, PP0V75_S3_MEM_VREFCA_B
SM_RCOMP resistors
Most likely they'll all be fine and it'll be a RAM or CPU issue though…
 
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