USB connection deep brick

I can't really put my finger on when the problem started.
Whenever i try to connect my G2 to my PC, it won't get recognized, nor in recovery mode or even in download mode.
* I tried reinstalling LG drivers, Google ADB drivers, I even got in the Device manager and manually installed legacy drivers that seems to fit but nothing came out of it.
** I've downloaded a bunch of diagnostic apps to see if the problem is in the phone software, and it seems like it but there was no working fix in any of them.
*** I've opened up my phone and cleaned the USB port and any other hardware that looked like it needed cleaning.
**** I've used Wifi transfer to copy a couple of other roms to my phone and try to flash them, hoping they'll get the software issue fixed.
***** because I cannot connect my phone to my pc via USB i cannot use LG Flash Tools.
****** I've looked all over google and other Forums for any similar case and solution, no usable info found...

NOTHING HELPS. :(:(:(

now I turn to you guys for help. hoping anyone will give me a solution that will work. :rolleyes: