Hi ringo111 & yepitsme,
For these type of network issues, we recommend to check the Ethernet cable and try a different one, also Reset the Slingbox to factory settings and if the issue persists it will be useful to try the steps that you can find here,
Output is 6.128V. I didn't check amps but as cold as it is, it must not be much.
I recommend to check the amps, that could be a power supply issue
Hope this helps