repair or replace luxman preamp


1991 system, luxman tp 117 preamp, luxman dc 117 multi disc cd player, adcom amp, powering kef bookshelf speakers in small family room, and 3 rooms with luxman inwall speakers.  Preamp no longer senses remote, limiting source selections.  Repair or replace?  Replacement rec?  Thanks. 
kidneystone
Post removed 
or maybe a universal remote could be programmed for your unit

or... replace the entire pre-amp
Thanks.  Remote replaced.  Preamp does not respond, additional ir sensor, preamp does not respond.
Check out cost to get an estimate on repair, if not to high then get the estimate, then decide. Your pre is 25 years old and probably need capacitor replacement and other deeds done in the process.