Ps5 C00C00303 Uart code

[kyle19s]

Hi,
I have a ps5 with uart code C00C00303
1V vcore is missing the apu does not start when pushing the power button. All ram start 1.5v is present.
Can any one help me with this code thank's

 

[CZFX]

C00C00303 refers to VRM Controller Access Error.If the APU is not powered, you need to check the XDPE chip and its related circuits.

 

[murT]

Same issue, replaced infineon with a known good one, seperated phases and no shorted mosfets. maybe Apu gone?

 

[badfish93]

Same here, replaced infineon but same error.

errlog 0:DB
← errlog 0:DB
← OK 00000000 80810001 FFFFFFFF FFFF0023 00000100 2141 0036 FFFF 1840:D0
80810001: General Power Sequence Failure (Check all standby and power-on voltages)

→ errlog 1:DC
← errlog 1:DC
← OK 00000000 C00C0303 FFFFFFFF FFFF0023 00000100 2141 0036 FFFF 1840:EA
C00C0303: VRM Controller Access error

→ errlog 2:DD
← errlog 2:DD
← OK 00000000 C00C0303 FFFFFFFF FFFF0023 00000100 2141 0036 FFFF 1840:EA
C00C0303: VRM Controller Access error

 

[AlexeyBogdanovSpb]

Same issue with EDM-033. I have replaced XDPE, but nothing has changed. Current consumption is about 400-800 mA during startup after power button is pressed. Then I found something interesting . When I use IOR dongle to read XDPE registers, my dongle starts hanging. When I cut traces SDA and SCL which are going directly to APU, dongle instantly shows me my PWM Controller. On the working board IOR dongle works fine without any issues, so I belive, XDPE not turning on, because communication with APU is faulty (even if diode mode readings are good). May be I will have enough time to swap whole set to another board and write results here