(347) 552-2258 help@rossmanngroup.com

820-3115 3 beeps

Chuck60

Chuck60

Member
Hi I got yet another board that does 3 beeps

I missing u7300 missing 19&20 But it seems I have all other signals.
with ram installed Smbus is good I have 1 beep with ram removed. All measurements with ram installed 12800& 10666 tested with both

1-DDRREG_VTTSNS=.75
2-PP1v5_S3=1.5v
3-PP075_S0_DDRVTT=.75
4-GND=0v
5-PPVTTDDR_S3=.75V
6-DDRREG_1v8_VREF=1.8v
7-GND_-DDRREG_SGND=0v
8-DDRREG_FB=1.5v
9-DDRREG_VDDQSNS=1.5v
10-GND
11-DDRREG_DRVL=driver frequency
12-PP5vS3=5v
13-DDRREG_LL=drive frequency
14-DDRREG_DRVH=driver Freuency
15-DDRREG_VBST=5.33v
16-DDRREG_EN=3.3v
17-MEMVTT_EN=3.3v
18-DDRREG_TRIP=.75
19-DDRREG_MODE=0v
20-DDRREG_PGOOD=0v

I check all of Q3200,Q3205,Q3210,Q3215
The only one that stood out as odd is ISOLATE_CPU_MEM_L= 2.5v
 
Last edited:
Chuck60

Chuck60

Member
Do you think it’s worth checking CLKE0, CLKE1 or DMI connections for some sort of
Signals or wave forms ? Or just call it quits ? Also thank you for your help
 
2informaticos

2informaticos

Administrator
Staff member
If the LEDs patron is correct, then traces and solders are good (to CPU).
You've already posted good voltages for RAM, so internal CPU issue is expected now.
 
2informaticos

2informaticos

Administrator
Staff member
Replacing BGA CPU is not easy job.
You need good skills and lot of practice to replace PCH, or GPU in Apple boards.
 
You must log in or register to reply here.
Top