News for Marvel 88ss9189-bld2

[fzabkar]

I suspect that these two "53CDKI" or "53CDK1" ICs are LDO regulators or load switches. The voltages on C135, C140, C106 and C139 would confirm it one way or the other.

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[ORPM]

Very interesting, do you suggest these LDOs could be the culprits? They could have a heat issue by design...anybody exchanged these and had success? I am not into SFM soldering but I can thread a thread into a running sewing machine's needle if I drink enough coffee...

[fzabkar]

When I used to troubleshoot microprocessor based circuits, I started by checking the power supplies, crystal oscillator and reset pin. Checking the supplies shouldn't take very long. You just need a cheap DMM.

[pepe]

There are a couple of things i would check with an oscilloscope...
chip-off is probably not an option due to encryption, unless one can find out how to decrypt...
pepe