Tried to start it yesterday. Turned over once then

When I turn the key on the speedo moves slightly up, then down. Nothing else. Checked battery. (Had a short in one b 4) Checked fuses - all good. Went to start tracking down electrical relays and noticed the large serial plug in to computer interface looking dealeo. It's injected. No fuel pump power up as normally heard. Nothing else.
Any suggestions? Taking it to local dealer will kill the beer fund ... for months.
thanks,
chuck