I have a "dead" JS16CWJ based USBDM. When I plug it in there is no activity on the COM LED and I believe that there is either a hardware fault or the Flash is corrupt. EXACTLY how do I re-flash it? I have another USBDM (JM60). Obviously I cannot use the USBDM app because, according to my computer, the board does not exist. How do I connect the two USBDMs together? I enclose a picture of the faulty board.