Edm031 no shorts no power,no draw

Immy · Mar 24, 2026

Hey everyone

I have this ps5 that initialy came in for switching on fan going crazy and switching off.

Turns out the heatsink had fallen apart. Dealt with that and went to test and then no power.

There's no shorts on the board that I can find. When connected to PSU there's no current draw at all.

I have 5v 12v 2v 1.8 but no 3.3.

I've attached my readings on da9056 as I believe this might be the issue.

Any help would be appreciated please

stetofix · Mar 25, 2026

5V should be on all 5V pins because they are all at one line.
If pin 29 (EN1) has 1.95V, pins 4, 17-21, 25, 26, 31, 32 should be active.

The active 5V and 1.95V enable input but the missing PG1 outputs are pointing towards a bad chip.

Immy · Apr 1, 2026

I respected the chip and now I'm getting very high power draw 300ma tob400ma then down to 95ma

I've done some searching and pin 13 isn't shorted diode value is 510. This indicates a bad SB right?

stetofix · Apr 1, 2026

It shows that the southbridge isn't sending enable (EN2) for the PG2 power lines.

At your first post there was no power draw at all. Now you have up to 400 mA and 95 mA standby. Seems to be a connection issue. What was the issue with the heat sink?

Immy · Apr 1, 2026

It had split apart, the CPU place from the heatsink had come off.

Initially when I first got it I tested it, it powered on for a few seconds fan spun like crazy and switched off. Then it never did that again

stetofix · Apr 1, 2026

Oh, that's not good. I would move the liquid metall to the middle of the APU core and check if the edges are ok and not damaged.

Immy · Apr 1, 2026

Took a real close look and it doesn't really seem like there's any real damage to the apu from what I'm seeing.

Post automatically merged: Apr 1, 2026

Also previously in another thread you mentioned some documents that show the power sequencev and which ics are activated in order. Was that the service manual or the schematics? I went through them, I didn't understand much, but I couldn't really find this power sequence

Immy · Apr 3, 2026

Any ideas?

stetofix said:
Oh, that's not good. I would move the liquid metall to the middle of the APU core and check if the edges are ok and not damaged.

stetofix · Apr 3, 2026

The UART error codes have a sequence number where the sequence step is at the time the error occurs.
This sometime help to narrow things down.
Other possiblity is to check the power draw over time begin with power plugged to the PS5. A healthy looks like the following image. And it is also sometimes helpfull to see in which part an error shows up.

Immy · Apr 3, 2026

I couldn't get this ps5 to respond to UART but I'll do it again just to be sure. This is my current power draw.

Avoiding the to graph it's all over the place. I'm not sure I really understand tbh

Post automatically merged: Apr 3, 2026

Soi was about to connect it to UART again and thought I'd just test it to see if it would power on

It fully booted into the system!!

stetofix · Apr 3, 2026

Strange. Crazy fan - switching off, no power no draw, draw aprox 80 mA higher as usual and now turning on normal. I guess something is loose and makes not propper contact.

Edm031 no shorts no power,no draw

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