PowerMatch PM8500 Failure
We have an installation with a PowerMatch PM8500 usb only version.
The amp suddenly exhibits the following failure; it powers up, but the front LCD doesn't lit up, only the front fault red LED lits up, no sound is heard and no connection can be established through the CS designer software via the USB. After replacing the faulty amp with a new one, the same exact failure happened again! Very frustrating...
The amplifier was installed in a rack with adequate ventilation at room temperature and in a dry and clean environment. All speaker lines where checked and no shorts where found, meanwhile the amplifier was used at low to medium level volumes, driving speakers at low-z no less than 4 Ohms.
Another fact is that it is installed under a Tescom UPS.