PS4 WLOD Issue Bad Diode Reading

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PS4 WLOD Issue Bad Diode Reading

Postby ranabp » Fri Jul 13, 2018 12:34 am

Hello!

I have a PS4 SAA-001 motherboard with no video signal. White light is present after the hard drive boots up.
The HDMI looked okay, but i still replaced it as it is the easiest. All pads / pins had good connection and continuity. Filters are good.
-> Still WLOD

Swapped the HDMI encoder chip IC with a known good ones (2 times); all pads are soldered and i checked each pin for shorts.
-> Still WLOD

Tested all diodes, and pin 13 resistor; Big capacitors have no short.

The pin 18 diode has a bad reading, it measures 0.116v instead of the good values. I have replaced the associated capacitor and the diode, but the value stays the same. I think is is the fault which is causing the WLOD. But i am not sure if it is critical.

Any help ideas or suggestions are greatly appreciated.
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PS4 WLOD Issue Bad Diode Reading

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Re: PS4 WLOD Issue Bad Diode Reading

Postby BwE » Fri Jul 13, 2018 12:39 am

give the apu a quick reflow and the ic chip too - could be bad solder joints or some mystical cosmic forces.
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