valuejet 1204 bad main board?

We have had the printer for a little over a year, and have had no problems with it. The other day I sent a print
Job to it, and it started printing dark colored bands of ink, looks like its all the colors, kind of a greenish black.
I kept trying to send print jobs to it, getting the same results. I checked the connections and everything was fine.
I did several strong cleanings, and even a couple ink refills. The same thing happened. So the next day I come in to
Work and start trying to print again, and the RIP software tells me it cant communicate with the printer. First thing I did
Was check the network connection, I noticed that there was no lights blinking on the router port where the printer was
Plugged in. so I unplugged it from the router and plugged it back in, doing the same on the back of the printer. Same
Results, no activity through the port. So I tried 2 other Ethernet cables with the same results. We have made no changes
To our network, or configuration to the printer which led me to believe either the network port on the printer was bad,
Or something else was wrong. i contacted our dealer and a technician had me unplug the printer for a few minutes,
And then try a test print. The printer acted as though it was printing, but no ink came out. There was still no activity on the
Network by the printer. After telling the Tech about this, he told me he was pretty sure the main board was bad. anyone have a problem like this?

 

i am using production manager 8.5 that comes with flexisign pro. i have tried pinging the ip address, with no response. i have already installed a second network card and hooked up the printer directly to the computer with a crossover cable following the instructions from mutoh's website, still no luck. i can however, connect using the USB port, but it prints blank.

 

also in response to RandyA, there are only 3 things connected to the router, my computer, and 2 mutoh valuejets, 1 works fine, the other is the one im having problems with. i am downloading TCPsend and the preripped files to try that.

 

the ip address, subnet mask, and gateway are correct. if i unplug the cable and plug it into my other valuejet, and change its ip address to the same as the nonworking printer, it works fine. so im sure its not the network.

 

tcpsend did not work. the ip address for the printer is 192.168.0.4. if i uplug the cable and plug it into my other valuejet,and change its ip address to 192.168.0.4, then tcpsend works for it. so my network settings are correct, there is something else wrong with the printer i think.

 

everything is the same, subnet mask 255.255.255.0, gateway is 192.168.0.1

 

is there a way to replace just that part? if this is the case, then i still have the problem of it not even printing a test print. or are these 2 problems related?

 

thanks for all your help, i appreciate it.