selling as-is for parts or repair. Powers on as shown, display shows output on channel C. 

onboard diagnostic shows amp good. cause of issue unknown. no further testing completed.

Total run time 3699 hrs. 

 photos show actual item for sale.

Features

• Total power up to 8,000 watts.

• Flexible Amplifier Summing Technology™ (FAST) drives most any loudspeaker system or configuration by distributing total amplifier power across one, two, three or all four channels.

• Four channels of full function onboard loudspeaker DSP with Crossover and Parametric EQ Filters, Limiting and Alignment Delay eliminate the need for outboard loudspeaker processors.

• Powerful Intrinsic Correction™ processing maximizes the sonic performance of QSC loudspeakers.

• 20 Factory Preset configurations that can be modified and stored in the 50 User Presets.

• PowerLight universal switchmode power supply with PFC for highest effiency, improved audio performance, and low weight.

• Four Input XLR connectors, and six NL-4 Output connectors.

• Integrated front panel with channel Select and Mute buttons, Input and Output LED Metering, 400x240 LCD, intuitive navigation buttons, LED power button and indicator, and cast aluminum handles.

• Preset Wizard simplifies amplifier configuration providing loudspeaker selection from a list of the top selling passive speakers.