This 820-3115 came to me dead. I fixed a short on 3V42 and now it has quater fan spin. PP3V3_S5 is stable, PP5V_S3 is pulsing every 5 seconds cause PM_SPL_S4_l is also pulsing. Not really sure where to go from here. Any known suspects like U1950 on 00165? I did replace U7200 and clock ic so far but no change. Thanks in advance.
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820-3115 PM_SLP_S4_L pulsing
- Thread starter Fizzl92
- Start date
Check for pulse at all big coils.
ALL_SYS_PWRGD pulsing also?
ALL_SYS_PWRGD pulsing also?
AVREF_SMC is present?
Test if board stays on in SMC bypass mode.
Be sure R7402/03 are good; resolder them and check the traces too.
Test if board stays on in SMC bypass mode.
Be sure R7402/03 are good; resolder them and check the traces too.
AVREF_SMC is 3.3V, steady.
R7402 150,4 kOhm
R7403 182,3 kOhm
I resoldered both.
Both have 12.57V at pin 2 steady and 12,4V at pin 1 pulsing. But i guess thats because 5V supply of U7400 is also pulsing, resetting the IC and Path to GND for TON Pins with every pulse...
In SMC bypass mode i get no green light, 12.3V (as expected) but also no start and pulsing rails.
R7402 150,4 kOhm
R7403 182,3 kOhm
I resoldered both.
Both have 12.57V at pin 2 steady and 12,4V at pin 1 pulsing. But i guess thats because 5V supply of U7400 is also pulsing, resetting the IC and Path to GND for TON Pins with every pulse...
In SMC bypass mode i get no green light, 12.3V (as expected) but also no start and pulsing rails.
In SMC bypass, still not pulsing at L7510/20?
Check U7400 pins, 46, 19, 29; should catch pulse at least.
Check U7400 pins, 46, 19, 29; should catch pulse at least.
Try known good BIOS.
If still the same, then bad PCH, or CPU.
If still the same, then bad PCH, or CPU.
820-3115-B DTY3 Clean ME - OK.rar
drive.google.com