Hi, I've a DLS-640T. My problem is that when it is operating the led status is off and the router doesn't work. However, if I use the device only as a switch it works properly. I believe that the flash memory is erased. Do you think that I could use the internal connector JP5 to flash the memory? (I' don't know the utility of this connector). Could someone please help me in solving this problem? Thanks in advance for your help.