Previous thread: >>108974412 The donor board has arrived. Unfortunately, it had no compatible clock generator chips. There are no obvious failures with the secondary clock generators (+2.5v power's there but they might be missing some enable signal from syscon?) By removing the clock gen ICs, reverse engineering the firmware further and probing around with a logic analyzer I can say that: - PowSeq error 8301 is caused by a shorted MK_I2C line (which would produce A0022114) - PowSeq error 8302 is caused by failure to communicate with any of the three clock generators, the order at which syscon communicates is determined but I dunno which chips map to what IDs, except for reference clockgen (addr 0x69) which comes first Replacing HDMI and AV encoders did not fix 092114 and 092124.
Remember when I said I2C switch might be at fault? I can see the bus being properly replicated to the secondary chip (3), so that's not the case. For the one of the chips, at least. Also, this is not I2C, this is SMBUS. Apologies for the confusion. XCG_EN line traces to Syscon pin 39 (P62). I don't think it has to be HIGH in order for the secondary chips to talk over SMBUS, it makes sense that this pin only enables the clock output once the proper registers have been written.
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Anonymous06/11/26(Thu)18:12:01
I have a PS3 along with a PS2, PS4 and a Vita in a storage box in the loft and I'll send you them all to you if you stop posting these shifty threads.
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Anonymous06/11/26(Thu)18:22:07
>>109031574 This is a good thread and it belongs here
I got it to boot, turns out one of the secondary clock generators suffered from power failure. I threw a bodge wire from another clockgen and got it to boot. There are BGA defects under the CELL/BE though, the board would have to be reflown.
>>109032388 reassuring, and still impressive are you gonna try reflowing or leave it as-is?
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Anonymous06/11/26(Thu)20:44:03
>>109032306 Is this some kind of gypsy trick where you got the parts board working and we're just inferring that you fixed the board that's lost its arse in a violent defenestration incident?
Right now, it's basically GLODing. Video subsystem is still fucked, but at least it's supposed to be booting now. After I fix the video subsystem and find some way to reflow the CPU... the console should be as good as new (no lmao) >>109032577 Parts board looks like this...
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Anonymous06/11/26(Thu)21:11:34
>>109032300 >There are BGA defects under the CELL/BE though, the board would have to be reflown. Guess that's why it was thrown out a window.
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Anonymous06/11/26(Thu)21:15:47
If you ever get this shit working you should install Movian on it and watch some American Dad
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Anonymous06/11/26(Thu)21:17:53
>>109032771 I think you got the cause and effect backwards. And even if you're right, it's only a heat death and subsequent rebirth away from working again.