Congrats on the 6100! Do you have the crazy video cable to use the DOS part?
For the no video problem, it might be a flat PRAM battery -- you might try doing the quick switch on/off/on thing, or (maybe more safely) subbing in a known-working pram battery.
For the no video problem, it might be a flat PRAM battery -- you might try doing the quick switch on/off/on thing, or (maybe more safely) subbing in a known-working pram battery.