The VMU beeps on start and the fan runs but I have no video or sound on HDMI or composite cables. I followed troubleshooting from the instructions: I do have the wireless access point. I have no option wire connected because DC was stock. I have verified no shorts and continuity on every pin to the back side of the resistor in the ribbon, where applicable. The only odd situation was the VSYNC pin and ribbon cable pad had continuity but at the resistor the wire was open. Eventually I ran a 30awg jumper wire from the pin to the resistor but still no success. During the install I did damage the reset pad on the back of the motherboard by using too stiff of wire which pulled off the pad during reassembly. I tried to repair a few ways and went with the silver epoxy defroster repair kit to adhere the wire to the remnants of the trace. If the RST circuit could cause my scenario, how can I be sure the reset wire on the back of mobo is connected properly?
Next, I searched online and learned about the LED. I have what looks like a dim LED which suggests no clock from Dreamcast, check connection to VCLK. I have no bridged pins around VCLK and I have contuity from the pin to the back of the resistor in the ribbon cable. I also saw the suggestion to run with ribbon cable disconnected from DCHDMI board, which I did with no success. I also verified proper voltages on the power supply pins. So what else can I check and how? Is there a pin out for the flat end of the ribbon cable? Any help is appreciated, happy holidays!!
Next, I searched online and learned about the LED. I have what looks like a dim LED which suggests no clock from Dreamcast, check connection to VCLK. I have no bridged pins around VCLK and I have contuity from the pin to the back of the resistor in the ribbon cable. I also saw the suggestion to run with ribbon cable disconnected from DCHDMI board, which I did with no success. I also verified proper voltages on the power supply pins. So what else can I check and how? Is there a pin out for the flat end of the ribbon cable? Any help is appreciated, happy holidays!!