Switch oled Short on "A" / "CMD"

[dewolf]

Hello,

i've one broken switch oled with PICOFLY chip on it.. console was working fine for 2 months, after stop wake up.
i've tested with OHM mode all points of the mods and seems to be a short on the "A"/CMD point

i've removed the mod chip but the short is still present

i've checked all the capacitor near the MT92 (and all the other power source IC) but everythings looks great... any tips where the problem can be?

 

[Relon]

It's connected to emmc. Maybe nand is a problem? What is your emmc model?

 

[dewolf]

SK hynix ... i'll try to desoldering and hope that a reballing can fix it

 

[Relon]

Did you reball it before when mounting the D adapter? On the other side of the CMD resistor is Soc. check both pads: which one has a short. From emmc side in diode mode is around 360 for Hynix, from Soc side (pointA) 700.

 

[dewolf]

nope, i install via emmc adapter (just put in place, no hot air) .. on the resitor point i read a short with 0.002 in diode mode... i'll check now when i desoldering the Emmc i'll keep you updated

Post automatically merged: May 31, 2023

FIXED a good reballing on the EMMC and everythings works again!