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Check continuity on all pins from motherboard to trackpad........ Also try another trackpad... Voltage on pin 10, 14 and 19... Measure in diode mode on pins 16 and 17...
i have previously tried new trackpad cable and trackpads (L2 so take it for what is worth)
i damaged pad for pin 18 SMC_LSOC_RST_L, had a jumper wire but that seems to have come loose again with all the moment
pins 16 and 17 are soldered ok
yes everything else passes ASD fine
going to find try to find another cable and trackpad again