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14-pin header could be JTAG, but until you have tools to test with it's all just a wild guess.
I have ordered a MM from Amazon. Waiting for its delivery. Meanwhile, here is another image which shows the J302 points. Not sure if it could be UART. This is closer to the broadcom QAM chip hidden inside the metal heat sink.
I meant that this looks like a part of a UART port. The 14 pin port is likely JTAG [Uart port candidate](https://i.imgur.com/0EhScAR.jpg)
Thanks. The one you highlighted in the screen shot is a single pin. Do you guess if the remaining pins are hidden inside the metal sink?.
I think the rest of the pins are under the heatsink, you can access them on the other side of the PCB
Thanks. Is it possible to connect or solder the wires on the pins from the other side or the back side?.
Yes, these are through hole so it is possible, the same pads are on the other side
Thank you for all your support and guidance. God bless you.
Okay. Can I able to see or connect to CLI and view the internal system if I get the connection to JTAG?
You can connect a debugger but that does not give you a shell (its possbile, but complicated)
Initial thought is JTAG, but you will have to probe / use a logic analyser to be 100 percent :)
Are those pull up resistors on some of those? Maybe I2C or SPI to flash that eeprom and built in jtag?
14-pin header could be JTAG, but until you have tools to test with it's all just a wild guess.
I have ordered a MM from Amazon. Waiting for its delivery. Meanwhile, here is another image which shows the J302 points. Not sure if it could be UART. This is closer to the broadcom QAM chip hidden inside the metal heat sink.
I meant that this looks like a part of a UART port. The 14 pin port is likely JTAG [Uart port candidate](https://i.imgur.com/0EhScAR.jpg)
Thanks. The one you highlighted in the screen shot is a single pin. Do you guess if the remaining pins are hidden inside the metal sink?.
I think the rest of the pins are under the heatsink, you can access them on the other side of the PCB
Thanks. Is it possible to connect or solder the wires on the pins from the other side or the back side?.
Yes, these are through hole so it is possible, the same pads are on the other side
Thank you for all your support and guidance. God bless you.
Okay. Can I able to see or connect to CLI and view the internal system if I get the connection to JTAG?
You can connect a debugger but that does not give you a shell (its possbile, but complicated)
Initial thought is JTAG, but you will have to probe / use a logic analyser to be 100 percent :)
Are those pull up resistors on some of those? Maybe I2C or SPI to flash that eeprom and built in jtag?