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Remove the stick and measure the Resistance of the spots for the RSC. See if there's a dead short or some value there.
It's on page 1 of this thread, RSX - TP66.
Welcome.
No idea how you came to that conclusion, C1 and L1 are around the AA battery terminals, they don't have anything to do with Menu button at all.
The Menu button trace runs right to pin 8 of U4. If there's no short on the trace anywhere then suspect U4.
Sir... you’re the legend! Indeed it was u4 just worked the solder on the pins and VOILÀ!Thank you RDC
The castellated pad 62 on the small MCU board, where it's soldered to the larger board, is RT. Then LT (TP68) is pad 52 for comparison, RT is 10 to the left of that pad. The top row there is 80 to 43, going left to right.