PS5 with C0810303 UART error. Replaced HDMI IC...but problem not solved

PS5 Questions PS5
1

Hi everyone,

First, I just want to thanks you all for knowledge I found here.
It helped me a lot to understand lot of points until today, and to fix some of my previous problems.

But today, I’m stuck with a not working PS5 (I bought it as alredy not functional).

This poor console has had better days I guess…it cames to me with few problems (but was not expensive :slight_smile: )
PSU was not working, APU dissipator was broken, and HDMI port has been previously repaired (not perfecly, but from what I saw and measured, it should be ok)

I fixed thos points, but this PS5 is still blocked with BLOD (2sec led light, one bip).
UART diagnostic gave me the error :
80810001 : "“PowerSequence - Power Sequence Error - General Power Failure (Peripheral, GDDR6, APU, Data Line Short)”
C0810303 : “HDMI IC Problem or Data Line Short or Power Failure”

Here is my understanding and analysis until now.

  • All stand by voltage are present and OK.
  • The power sequence is starting, and here is the behaviour of the different voltage regulators
    • hdmi 1.8v pwr: receive 3.3v EN from southbridge => 1.8v in output for few ms, and 0v then.
    • hdmi 0.9v pwr: receive 3.3v EN from southbridge => 0.9v in output for few ms, and 0v then.
    • hdmi 5v pwr: no 3.3v EN from southbridge => no 5v, nothing, 0v.
  • My understanding is: southbridge is starting power sequence (so i guess SB is ok), something bad is happening. SB stops the sequence before 5v EN is enable.
  • I found a short on “1.8v pwr” rail: resitance to ground was ony from 1 to 2 ohms (depending of different measure)
  • I made some injection on “1.8v pwr” rail and with thermal camera I saw HDMI IC was warming.
  • I replace HDMI IC: now short is gone but all the previously described behaviour is the same.
  • I’m not expert in hot air welding…but looking closely, it does not seem that bad

So now, I’m asking for your help.
I don’t knwow what to look at, or to look for.
I do not find any other short or suspicious component.

Any ideas or help would very appreciated.

Edit: just one precision: motherboard is EDM-031

Thanks a lot.

2

Was the UART code before HDMI IC replaced?

Did you measure hdmi ic surrounding diode/resistance reading after replacement?

3

Thanks for your answer.

Yes UART code was before (I made lot of measure and analysis before replacing anything on the board).
I’ve cleared error code, and it is back..same code.

Yes I measure HDMI IC before repalcing.
The only anormal things were on all pins connected to 1.8v rail: Diode mode: 0.00v and ressistance mode: 2ohms

4

Hello,

Small updates of the situation. I finally found few pins on HDMI IC that were not well welded.

I fixed that, and behaviour have changed.

Now I’ve blue led light for around 10s, and stop.

And new UART error code…but don’t know what to think about.

Here are new logs:

[Slot #] [Date Time] [Error Code] [Priority] [Error Message]
01 29/05/2026 23:26:14 E3122336 High Not found in list. Report Findings.
Click Here To Report
|-(OK 00000000 E3122336 FFFFFFFF FFFF0000 00000000 2004 0000 0000 0000:71)
Click for TSB Information

01 29/05/2026 23:26:14 E2E00000 High Not found in list. Report Findings.
Click Here To Report
|-(OK 00000000 E2E00000 FFFFFFFF FFFF0000 00000000 2004 0000 0000 0000:74)
Click for TSB Information

02 29/05/2026 23:26:14 E1E00000 High Not found in list. Report Findings.
Click Here To Report
|-(OK 00000000 E1E00000 FFFFFFFF FFFF0000 00000000 2004 0000 0000 0000:73)
Click for TSB Information

03 29/05/2026 23:26:14 E2F00010 High Not found in list. Report Findings.
Click Here To Report
|-(OK 00000000 E2F00010 FFFFFFFF FFFF0000 00000000 2004 0000 0000 0000:76)
Click for TSB Information

04 29/05/2026 23:26:14 E1F02280 High Not found in list. Report Findings.
Click Here To Report
|-(OK 00000000 E1F02280 FFFFFFFF FFFF0000 00000000 2004 0000 0000 0000:80)
Click for TSB Information

05 29/05/2026 23:26:14 80C0012D Low EMC - EMC Watch Dog Timer Error - No memo
|-(OK 00000000 80C0012D FFFFFFFF FFFF0000 00000000 2004 0000 0000 0000:7A)
Click for TSB Information

06 29/05/2026 23:26:14 FFFFFFFF Low No Errors
|-(OK 00000000 FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFF FFFF FFFF FFFF:5A)
Click for TSB Information

5

code start with E***** seems related to XDPE phase pwm controller

6

Ok, thank you.

Should I consider to replace this chip ?
I don’t find lot of information and seller about it.

Or could it be relative to some components around it ?

I don’t know in which direction to search. Any ideas would be very welcome :slight_smile:

7

Hello,

I had another look to the replaced HDMI IC.

I found strange values on pins 36 and 37 (SDA & SCL). Both seems to be shorted.

Is it normal to have such values when no power on board ? Maybe are they pulled down ? Or is it a real ,short?

8

I dont remember any pin has low measure/reading except ground pins on HDMI PORT/IC

9

Ok, this confirms me what I thought.

I thought it was bad welding of IC HDMI, so I removed it….and short still present :frowning:

HDMI connector have been replaced by previous owner, I removed it too. I had a bad feeling about it, as some tracks appeared to have been repaired (overheating during replacement I guess)

Pads for pins 14/15/16/17 were broken, leaving a big brown stain on the PCB. Some of this pins are corresponding to SDA/SCL I was talking about.

But even with HDMI IC and port removed…short on SDA/SCL still present :frowning:

A little desesperate by not founding where this short was coming from, I’ve decided to physically cut tracks linking HDMI IC and port (yes, i know, this is a bit radical :stuck_out_tongue: ) for both of those pins.

I cut them between pads of the right side of HDMI IC…and surprise…short is still there.

I’ve scratched a big part of the pads…and it is still shorted…
I finally cut the tracks between HDMI IC and those pads…now the IC is not grounded anymore.

So the short is on the pads. Problably in a under layer of the PCB.
But is it a PCB default (overheated by exemple)…or is it by a component connected by an inner layer of the PCB ?

My question is, SDA/SCL are connected to HDMI IC (pins 36 & 37) and HDMI port (pins 16 & 15), but is it connected to something else ? (southbridge ?)

10

both SDA, SCL have tvs diode to ground on the back side of the hdmi ic

image
image704×796 154 KB

11

Thanks you very much, it helps me a lot.

Both diodes indicates 0.00v in both direction…no resitance at all.

Is there a root cause for that ? Or could I just replace them ?

And what is the reference for this part ?

Thanks again.

12

remove them and check again your reading. If reading comes back normal, you could start looking for replacement. Part number is CDZVT2R5.6B from datasheet

13

Ok…I removed both diodes and all shorts are gone.

Measures on diodes onces desoldered confirm that they are are definitly dead.

Next step: new diodes and resolder HDMI IC and port…and test

Thanks a lot.