PS3 CECHB00 No Standby

[hrist]

Hi! Got a CECHAB00 with instant YLOD. I disassembled it and soldered the Syscon wires to get the cores but it never went into standby (no red light) after plugging it afterwards. It seems Syscon isn't working.

Don't know what happened here!
- I took care during the dissasembly.
- Nothing special happened while soldering the wires for the TTL
- Never injected voltage to the syscon by mistake using the wrong TTL pins.
- The 10 Pin flex cable to the led/power button board is fine.
- PCB is pristine, also has different masks like the other two i had and all the traces are really easy to follow and test.

Now i'm looking around por problems.
- +5V.EVER, +3.3V_EVER and +1.8V_EVER are up.
- I've been checking components around the syscon comparing them against the ones from another PCB that goes into standby but i'm not finding anything.

Does anyone have a hint of what should i look here to confirm the failure? Can the Syscon be replaced or something?

Thank you in advance!

 

[hrist]

Checked the board using COK-001-002-MB_Ohm_Test_points.jpg as reference, most of my measurements seems off but don't know what kind of threshold i should look for.

RSX_VDDIO: 44.7 ohm
FBVDDQ: 93.1 ohm
RSX_PLL: 3.9 kohm
RSX_VDDC: 1.8 ohm
VDDR: 276 ohm
YC_RC_VDDIO: 12.6 ohm
BE_VDDC: 1.8 ohm
VDD_MEM: 16 ohm
BE_PLL: 1.5 kohm
MC2_VDDIO: 26.9 kohm
VDDA: 3.6 ohm

 

[hrist]

I actually tried to connect to the SYSCON anyways via UART and it works!
Funily i was able to recover the standby light and a working power button before setting the syscon access to external.

# bringup

[SSM] state: 0000 -> 0101

Bringup Mode #0 (0xFF)

[SSM] ssmCb_OnStartingBePowOn() called.

[SSM] Bringup mode : syspm_stat=00000000/00000000

[POWSEQ] PowerSeq_Setup called.

[SSM] state: 0101 -> 0301

[SSM] PowSeq Fail : Detected !

[SSM] state: 0301 -> 0700

[POWSEQ] AV Backend Letup

[SSM] Shutdown mode : syspm_stat=00000000/00000000

[ERROR]: 0xa0003001

[ERROR]: 0xa0003001

# errlog

ofst[ 16]:err_code:0xffffffff, clock:0x12d44a46  2010/01/04 06:42:14

ofst[ 20]:err_code:0xa0801001, clock:0x12d44b33  2010/01/04 06:46:11

ofst[ 24]:err_code:0xa0801001, clock:0x12d44fc3  2010/01/04 07:05:39

ofst[ 28]:err_code:0xa0801001, clock:0x12d55991  2010/01/05 01:59:45

ofst[ 32]:err_code:0xa0801001, clock:0x12f6d01a  2010/01/30 11:10:18

ofst[ 36]:err_code:0xa0801001, clock:0x15639258  2011/05/16 07:44:24

ofst[ 40]:err_code:0xa0061002, clock:0x2e1bd176  2024/07/06 09:57:10

ofst[ 44]:err_code:0xa0061002, clock:0x2e1bd17c  2024/07/06 09:57:16

ofst[ 48]:err_code:0xa0061002, clock:0x2e39e097  2024/07/29 05:09:43

ofst[ 52]:err_code:0xa0061002, clock:0x2e39e0ac  2024/07/29 05:10:04

ofst[ 56]:err_code:0xa0061002, clock:0x2e39e0c1  2024/07/29 05:10:25

ofst[ 60]:err_code:0xa0061002, clock:0x2e39e0c8  2024/07/29 05:10:32

ofst[ 64]:err_code:0xa0071002, clock:0x2e39e0e1  2024/07/29 05:10:57

ofst[ 68]:err_code:0xa0061002, clock:0x2e39e0f2  2024/07/29 05:11:14

ofst[ 72]:err_code:0xa0061002, clock:0x2e39e0f6  2024/07/29 05:11:18

ofst[ 76]:err_code:0xa0061002, clock:0x2e39e0fd  2024/07/29 05:11:25

ofst[ 80]:err_code:0xa0061002, clock:0x2e39e11e  2024/07/29 05:11:58

ofst[ 84]:err_code:0xa0061002, clock:0x2e99a171  2024/10/09 20:17:53

ofst[ 88]:err_code:0xa0003001, clock:0xffffffff

ofst[ 92]:err_code:0xa0003001, clock:0xffffffff

ofst[ 96]:err_code:0xa0071004, clock:0xffffffff

ofst[100]:err_code:0xa0093004, clock:0xffffffff

ofst[104]:err_code:0xa0071004, clock:0xffffffff

ofst[108]:err_code:0xa0093004, clock:0xffffffff

ofst[112]:err_code:0xa0003001, clock:0xffffffff

ofst[116]:err_code:0xa0003001, clock:0xffffffff

ofst[120]:err_code:0xa0003001, clock:0xffffffff

ofst[124]:err_code:0xa0003001, clock:0xffffffff

ofst[  0]:err_code:0xa0003001, clock:0xffffffff

ofst[  4]:err_code:0xa0003001, clock:0xffffffff

ofst[  8]:err_code:0xa0003001, clock:0xffffffff

ofst[ 12]:err_code:0xa0003001, clock:0xffffffff

# becount

Bringup : 555 times

Shutdown: 64 times

Power-on: 0day 14hour 39min 42sec

Its working after changing RSX tokins!

 

[NightLess]

Did you ground Diag before enabling internal mode? If so then there is indeed no standby, you need to enable internal mode and then ground Diag.