New Holland LX885 starts but controls nonresponsive?

[dayslaw]

I have a 1995 New Holland LX885 I purchased used years ago. Yesterday it started up, but the foot controls for the bucket and boom would not budge, and the controls to move forward and backward did nothing. The pedals feel like they are frozen solid. The controls move some, but feel like they are doing nothing, and I cannot hear any hydraulic engaging or even trying to engage. The "stop" light came on, so I shut it down. Whomever I purchased it from had it set up to operate with the switch in the service position, and had disconnected/bypassed the seatbelt sensor, as well as the control valve sensors in the compartment under the seat. It has operated this way since I purchased in 2009. I thought it might be low on hydraulic fluid but it is not. I tried to start one more time and when it was about to start I heard a rattling or binding noise so I just shut it off before it started. The controls have never frozen before. I last used it about 5 days ago, without issue. I would appreciate any help diagnosing it. Thanks