B Rad

I have had the exact same issue as WernerAir, except this happened after I input the approach into the FMS and pressed exec. Left FMC went blank, all buttons and knobs would click but were uresponsive. The backup attitude indicator gauge was the only thing working. All other guages were frozen. Could not extend flaps but could extend landing gear. Could also extend speedbrake using my joystick but, oddly, it did not appear extended on the aircraft model (only the effects were apparent), whereas the landing gear was visibly extended. Yoke was also throzen as were throttles. EFB was working fine. This was about 5hrs into flight OAKB - LFTM.