It has ESP power now, that must be a new feature.
Are you doing the reset correctly as posted in the FAQ and WIKI?
Sounds like a loose connection.
On my 2000 I had problem with the power connections to the HD's. The sockets had discolored which indicates heat. I used a pic to tighten the sockets. Also be careful with the shield, I had mine cut through the insulation and blew the fuse.
The 2000 will boot with out HD installed. Disconnect the HD and see if you gain access. Then try connecting 1 drive at a time. You can do all of this with the case open. If both drives are set to master or slave it want boot to.
Does yours have the 2032 battery? It has been proven that some models will not boot without a good battery.