Could anyone explain me, why position (polarity) of condensers 4.7uF on REV 8(blue) and REV 9 (red) are different?
It's a bug in v8 fixed in v9, so v9 is correct, see link this post
Hey I recently got a batch of ten pro 3.3v pro minis from ebay, I removed vreg + LED on two of them and they no longer work... Well, I cant upload.
Did you try to use side pins for Vcc/Gnd connections from usb-ttl adapter? It is known for some clones that Vcc/Gnd pins on programming header do not work after regulator and led are removed and side pins must be used for uploading sketch...