I should warn you of this because it cost me an extreme amount of frustration and anger to solve this problem.
I've been watching this forum for a while since I first obtained a ViP 622 receiver after upgrading to the Dish GoldHD with America's Top 250. Not to bash Dish Network. I have no problems with them as a service provider and their better than Comcast on any day of the week which is why I've been with them for 7 years, but Dish Network does some funny things with this receiver and I feel I should inform you of them.
First off, if your receiver is like mine was - which also fell into the infinite reset loop within 12 hours of being installed back in January (ironically, the first time I came to this site looking for answers as to why), it will only be displaying a green light and the fan will be constantly blowing.
Your receiver has not overheated. Don't even let that notion cross your mind. No, leaving it unplugged for a few days and letting it sit will not magically cure your receiver of its ailments.
Now to business: Check the label on the back of your receiver. What your looking for is to see if your receiver is labeled as "Remanufactured", "Refurbished", or any other variation of this. If it cannot be found on the receiver itself, check the box the receiver was delivered in which should have been left by the installer. Dish Network has a habit of giving out Refurbished receivers as new and not informing the customer of such.
So you know I'm not just spouting bs, this claim can be backed up by performing a search related to such. I would post links backing this, but apparently, I require 5 post to do so.
For the record, the ViP 622 I giddily received was Remanufactured though I received it under the belief I was getting a brand spanking new Dish Network receiver, fresh from the Assembly factory! Was I wrong, or what....
Secondly, I don't know why people keep suggesting that electrical outlets have anything to do with it. The CSR I was on the phone with drove me crazy with these suggestions ranging from "take it out of the surge protector" which the installer (who was also nice enough - not sarcasm - to redo my entire wiring, including a new switch, new LNBs, and all without charge) had chosen to connect it to, to "plug it into the wall directly". "Try another socket". I went as far to as to grab my extension cable and connect it to another circuit entirely to be plagued by the same result which I knew was going to happen, but hey, sometimes you just need to grit your teeth and work with people. This CSR noted my account to have a credit placed on it for the days without service and scheduled a tech to come out on Saturday. It was Monday.
Prior to my making the phone call, the receiver fell into the infinite reset loop and proceeded from their to doing I don't know what within hours of being installed. Actually, every time it reset, it caused the other two SD receivers in my home to reset as well. At some point before midnight, it refused to ever come on again, properly, prompting my call.
I called a second CSR the next day to try and work my way around and get a tech out sooner as I was sitting with what was basically a big silver Paperweight. This one actually recommended changing the channel, although I relayed to him about 6 different times that it was connected via HDMI with another S-Video cable connected just in case I got it back on and the problem was with the HDMI. Nope. I could not relay that changing the channel was pointless, let alone not possible. Instead I asked about having a tech sent out and he noted one was already scheduled and stated there were none available in between. Tuesdays rolls by and the weeks rolled on without Television service.
Saturday came around and the Techs were there bright and early at 8 AM. This is when I found out some grim news: ViP 622's are prone to a litany of problems according to the Dish Network Technicians that I had to wait nearly a week without TV service to visit (which thankfully, the CSR credited me for), including, but not limited too: HDMI port failure, Ethernet Port Failure, and general Hardware Failure. These techs informed me that I was one of a number of persons who were experiencing problems with the 622 in their general area of service. They noted what the ViP 622 was doing (behavior similar to that of the OP), and no matter how many times they unplugged it (the receiver was absolutely responseless to all commands issued via the remote or the front panel), it failed to even come up to "Acquiring Satellite Signal".
One of the Techs promptly proceeded to his truck and returned with a ViP 722 which I must say has worked flawlessly since that week in January. In under 10 minutes he had it configured, activated, and was on his way with my many thanks. My recommendation, call Dish Network and ask for a tech to be sent out. Tell them your receiver is not functioning properly and that you are without service. Try to have that technician visit as soon as possible. This is the best method I can recommend to getting your service corrected.
The fact of the matter is that the 622 has problems. There of course those who don't and likely won't experience any problem what so ever, but then there are those who will. I think I can best compare it to the PlayStation 2, where some people experienced the Disc Read Error, and there were some who did not. Later models experienced minimal problems by comparison. By that summary, the ViP 722 can be best compared to later models of the PlayStation 2.
I hope this post helps the original poster and any others who may have this or similar problems.