If the fan never turns on (causing overheating) or runs at full blast constantly, the thermal sensor circuit is at fault.

: A blown transformer is a documented cause for units that fail to power on or cause a short when connected. Noisy Audio

: Built around a 24-bit Texas Instruments DSP module, providing 25 effect presets including reverb, chorus, and flanger.

Behringer’s official service documentation (usually a PDF of 40-60 pages) contains several critical sections:

: 2 x 350 Watts stereo (800 Watts in bridged mode) at 4 ohms. Input Section : 14 channels total, including 9 high-quality IMP "Invisible" Mic Preamps with +48V phantom power. EQ & Effects

The PMP2000 delivers 800 Watts of peak power in bridged mode (500W RMS at 8 Ωcap omega ) or 2 x 350 Watts peak (2 x 250W RMS) into 4 Ωcap omega