It sounds similar to what is happening in this thread: https://community.sling.com/thread/12145
This problem also happened to me with a Slingbox Solo. Power light only, no network light, and unable to reset.
I had an extra power adapter from an earlier Slingbox problem, and using that adapter worked for me.
If you are still having issues with the network light on your Slingbox, you might want to try the troubleshooting steps listed on this article. It will help us to determine if the issue is caused by a hardware problem. If this is the case, please contact us by phone so we can process an order to send you a replacement unit.
I hope that helps.
I have the save problem. Haven't been able to use my Solo since October (It lasted just over 3 years).
I have tried numerous resets, replaced all the cables and hardwired it to my laptop with no success.
Every time I reset it seems to go through the set up process, the power light stays on and the network light does flash for a while then goes out.
If I remember correctly, when it originally failed to work I noticed the unit was extremeley hot, specifically where the power lead and network cable plugs in.
I hope someone can give a suggestion as to what to do, short of buying a replacement.
I also had this problem with my Slingbox Solo. It was working perfectly for 12 months and then in it's 13 month it suddenly stopped. The power light was on but no network light. I tried doing a reset to factory settings and nothing happened, I didn't get any blinking/flashing lights so I tried following all the suggestions on the support pages. I tried connecting to my pc, direct to the router & Modem etc etc & it isn't finding it on the network. I've given up trying.
I'm completely upset and also angry that something has happened to it - it wasn't touched at all, I didn't aquire a new pc or router, it simply stopped working. At the time I purchased my slingbox it was approximately £130 and I wont be buying another or recommending them to others as it appears from all the support forums to be a common problem. Additionally, having to pay for support after 90 days is unreasonable as the product shouldn't be faulty and people should not be having problems with after 3 months. Very, very disappointed with this product.