XPA-5 Speaker wires crossed, now no sound

[donrua]

My XPA-5 was purchased new 4-5 years ago. I never hooked everything up until recently. My wife and I were playing acrobats half way in the air hooking up speaker wires. In one occasion +/-ve of one set of speaker wires touched each other. I saw a SPARK. I saw a "pop". It happened twice. Protection kicked in. Amp was shut off. I thought it was safe. Then we realized that channel stopped working. I switched speaker wire to confirm the finding. I wrote Emotiva to no avail. Can someone offer some help pls?  Thank you in advance.

Sources - Asus VivoBook Laptop (Tidal and purchased LOSSLESS), Sony DVD player (movie and music), Local Cable Box (Netflix and news) 
Dac - Sabaj D5
Pre-Pro - Sherbourn PT-7030
Amps - Emotiva XPA-5 Gen2, Spectrum Musician III MKII
Speakers - (front) Anthony Gallo 3.5 Reference; (Centre and sides) Anthony Gallo Reference AV speakers; (rear) small polk audio 2-channel
Interconnect - AudioQuest 6ft XLR, Spectrum RemoteSense SE MK1 speaker cable, AudioQuest NRG power cables, MonoPrice 3' XLR, MonoPrice 12-guage speaker wires, Monoprice banana plugs, Monoprice Power Surge, MonoPrice HDMI, USB, Coaxial, Optical cables
Power Supply - upgraded 30A wall plug.

[405x5]

Fuses are the first place to start after cleaning up your loudspeaker connections.

[geebo]

You can open it up to check the fuses or try calling Emotiva directly. It's faster than emailing. And you might want to check the RCA/Balanced output switches on the back to make sure one didn't inadvertently get knocked out of position.

[DYohn]

This is why you NEVER mess with hookups while the equipment is powered on. The amp must have been in standby, not off.