PS5 slim (EDM-040) BLOD (10 seconds to infinite)

[Papaille]

Hello Everyone

I brought a defective PS5 slim (rev EDM-040)
First failure was the psu (OV output). After replacing IC32, it work again

Second failure (and that's why i'm here) is the motherboard stay in a BLOD state.
What i've already done :
- Idle Consumption : 0.07A up to 0.221A for 3 seconds ans go back to 0.08A
Nothing particular with UART at this point
- When trying to power on :
2 case :
Case 1 - Infinite flashing blue light => No UART codes. SSD controller (CXD90070GG) seams to be really hot. I mesured with a thermal sensor around 65 degres on top of the die, after only 10 seconds powered on
APU/Rams are warming too, but APU rams are around 40 degres.
I have noticed that Nands seems to stay cold (i can touch them without feeling a heating, witch not comparable to APU ram)

Case 2- Crash after 10 seconds of BLOD. Nothing on screen, like case 1
In this case, i have a UART report : 80801028 Low Know, Unknown 80801028 (SSD) Report Findings OK 00000000 80801028 1B659452 FFFF0005 10000100 2013 0036 31AB 2168:2D)

Clearing codes and try to reboot send me alternatively in case 1 or 2 (Case 2 is really more difficult to obtain)

I mesure DA9065 and DA9081, nothing special with voltage or diode/resistance values.

Any idea for what to do next?

Thanks a lot!

 

[thesjaakspoiler]

Sounds like a full short of something related to the SSD Controller.
That is also likely preventing the UART from functioning.

Were there any signs of leaked liquid metal?
It could be that some liquid metal is shorting a data line of the SSD controller either to the APU or RAM.
issues with capacitors or RAM chips usually don't heat up the SSD controller.

 

[Papaille]

Sounds like a full short of something related to the SSD Controller.
That is also likely preventing the UART from functioning.

Were there any signs of leaked liquid metal?
It could be that some liquid metal is shorting a data line of the SSD controller either to the APU or RAM.
issues with capacitors or RAM chips usually don't heat up the SSD controller.

Hello, thanks for your reply

There is nothing about liquid metal spilling. I will double check again, but i’m pretty sure everything is fine in this way.
In addition, ssd controller is on the opposite side of the apu on edm-040 board.

Could it be the ssd controller itself?

Resistance on 0.8v line from da9081 to ssd controller is 71 ohms.
Diode mode => 0.121 (is it supposed to be normal?)

Injecting 0.8v directly in this line return no consumption at all, meaning to me there is no low short on this Line