Jbl PRX-518

Have ended up with two JBL PRX-518 cabs with NONE WORKING built in amps Curious if anyone has anything on these as far as trouble shooting, schematics, procedures one could follow to get these working.

I would like to try to get these going again but not a necessity. I picked these up for 50bucks a few years back for the cabs, which I loaded different driver. I have since built another box for the drivers I put in these cabs and the 1 ohm speakers prove to be a pain to power.

Any way, are they worth the effort or should I turn them into boat anchors?