I understand you are unable to get a solid network light on your Slingbox Pro-HD. Based on the troubleshooting steps you described you had done on your own, I recommend trying a factory reset of the Slingbox Pro-HD next. Linked below are the instructions on how to perform the factory reset:
If the issue persists, it may very well be due to a failing power supply. If you try the factory reset and the issue persists, I recommend ordering a replacement power supply for the webpage linked below:
If the issue STILL persists after trying a new power supply, you may return the power supply within 30-days for a full refund.
Hope this helps!
Sling Media Forum Moderation Team