There is dead, then there is dead... If you are using Linux, open a terminal window ( in Ubuntu it's control+alt+T ) and type lsusb with just the 2 assumed dead connected.  Usually you don't get the hubs listed.  If 1 shows, pull 1 and try again to see which shows up.  This will only show the ones that can still ' talk ' on the usb line and not anything else.  With the resistor overclock not even warming it up, it looks alot like SMD rework of the voltage regulator ( U4 by the resistors for the overclocking ) may be bad on them.  The dot indicating pin 1 should be closest to the USB connnector on it ( just in case in mass production on yours they got put in upside down ).  The power regulator is suseptable to transient current when soldering so a grounded tip soldering iron is recomended or hot air work station.  For what little cost those ICs are at places ( Mouser, etc ) it might be worth just checking that they are the correct orientation and no weird burn marks near them.  Also all the pins on my ants for U2 ( the ASIC ) are clean other than the solder and can be read with the USB connector DOWN.  Looking at the board, you will get what I mean.  you haven't said ( and I forgot to ask ) if the red LED goes on when you plug it in.