how to troubleshoot memory chips

[kjchatman1]

i have a playstation 5 with faulty gddr6 memory.. the resistance on the power rail is very low but when i inject 1.5 volts it doesn't draw more amperage than a good working board. is there a way to single out the faulty chip without removing all of them? it has 8 of them. Could I damage it if i inject 3volts?

 

[2informaticos]

3V is far to high.
What is the exact ohm resistance there?
Big difference comparing with good board?

If resistance to ground is not very low, voltage injection doesn't help; maybe IR cam can help.
Lift the coil from corresponding power supply and check which size remains with lower value.

 

[kjchatman1]

i removed the ic , the mosfet and the coil. the low resistance is on the rail itself. IT was 30 ohms resistance then i inject 1.7v and then it went to 42 ohms. it only draws 0.2amps and that is what it does on a perfectly working board

 

[kjchatman1]

i replaced all the memory chips. it doesn't crash anymore

 

[2informaticos]

You can post diode mode reading on that power rail, from good board.
Just in case someone else need it.

 

[kjchatman1]

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