Sundown amp going into protection mode

[subzeroram]

I have a sia-3500 pushing 2 sa12v2s. Ive ran it for about a year and half and never had any issues. A couple weeks ago i added a down4sound lts-6.0. Played it for about an hour with no issues. A few days later it played for about 30 seconds and went into protect mode. Now when i turn it on with only power, ground, and remote connected, it will cycle through power, clip, and protect a few times, but then stays in protect. Voltage is good at the amp and its wasnt getting hot. Any help on what to check next before i start a warranty claim? All help is appreciated.

 

[hispls]

Not much user serviceable about an amp powering up into protect with nothing else connected. Send it back for repair/exchange or whatever they do with warranty on these.