how to find rx tx
 

hi bro,
i m using infinity box and its original pinfinder for china fone flashing,sometimes i faced the problem with tx rx gnd points because some times its not properly work,when pinfinder finds the rx tx then infinity works but when pinfinder does not find rx tx then i feel myself in space because when i open the mobile and put the joints rx tx and try to format with infinity the box does not work to format or flash even i tried the charging jack points but problem the same,plz tell me how to solve this, because i 100% sure that there is mistake in my way so kindly help me if u understand my problem,thanx alot if u responce.

http://www.mtk-box.com/img/super-doctor3a.jpg
i think the super doctor 3 good of find the pinout,usb or com
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