anyone good at trouble shooting? 2 motor esc behaving similarly in quad, other 2 works fine

May be calibrated in wrong way. Can you tell how did you done that. And post ESC specs also.

Try swaping the motor and esc in many ways..
Also which control board?
Make sure inserted in correct pins..

Yet to connect to FC, flip32+ though, akhil I calibrated it with a brand new radio preassuming the.end points.are.fine, anyways 2 successfully calibrated, what can be done if calibration wasn't successful?

Bump, forum heros

re-calibrate. dont check it via FC first check it directly connect it to the receiver and then test.

Swap the ESC with motors and then check (as pointed by arun)

i tried powering up non spinning systems separately, one gives beep 1,2 of 3 beeps of cell count, other gives beep 1-3 (missing 2nd beep)

Did you swapped and tested man?

yeah, the wires on motors were copper, the suffering or partial beeps from motors mean the connection in broken, after sanding the motors worked, but some again show the same behaviour..
let me see if i can remove the current wires and solder the motors directly to the board, this should fix the issue

PS- its because copper silicon and insulation  combination somewhat don't conduct that well