No leds active on the motherboard, only the tuner led.

1. Try it with another power supply that is 12vdc and at least 3amps.
But beware of the polarization, the center must be the plus side.

2. If that not have helped, check the dc voltages if they are present.
Dm800se fault-finding, vdc measurements

For more info, see my dm800se topic,
Dm800se, Schematic drawings, Pcb images etc..

_________________________
Doing nothing leads to nothing.

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Will be given here, or on the jb8a8f8 forum and I prefer it in English.
Johnny B.

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