Hello people somebody help me¡¡¡ i have a serial cable of an old mouse, and i connect it to the PCB and when i wrote at the hyperterminal i see the characters on the screen, even with the GND cable coneected to the GND of the PCB. but when i plug the SATA power tho the PCB, ocurr two things: 1. When i write Ctrl+z, only appear an arrow, not the F3 or 2. If i connect the GND cable to the GND on the PCB, i can't wrote anything in the hyperterminal. I try change the Tx and RX and nothing happens. ¿Would be that i need connect the cable of energy to some font? or what more can i do? I'm desperate¡¡¡