I have QFX box that was working fine with my antenna, then I disconnected it to move the tv, now it does not work. The red light just flashes; how do I fix the issue?

I have one of those right here attached to my computer so I can watch TV on the PC. The red-green light is the power indicator. Your converter is turning off for some reason. Possibly it is getting a signal from another remote, and turning off. You can block the converter's remote sensor with something (black tape works) and then change the channels with front panel buttons if it has them.
Mine has power buttons for both the TV and the converter, so watch out for that.

Ok This is what I found out and hopefully found your solution..
Have you heard of Double Rescan?
The Federal Communication Comission Designed a Process called double rescan.
Double Rescanning erases and thenreprograms the channels in the converter box an digital TVs memory.
To Double Rescan, you will first need to disconnect the antenna from the converter box or antenna.
Then disconnect the converter and or digital tv power supplies from the wall. Wait a minute before plugging them back in. The antenna should still be disconnected.
With the antenna disconnected run the channel scan function on the coverter box or digital tv. When the scan completes you will have completely removed any channel data the converter box or digital tv, had in its memory.
Now it's time to rescan for real.
Do this by reconnecting the antenna to the converter box or digital tv and running the channel scan function again.
Thus the double rescan is born.
If the double rescan doesn't work, then try some tips and tricks to get your converter box up and running..I will have to look up the url again that has the tips and tricks...
If the double rescan doesn't work let me know and I will look up more options..
I really hope this works..

Try to disconnect the set and a box if being used from power for a while and then power both back as either could cause this problem.

Here is what worked for me:

1. On the LST-4100A box, there is a black, removable card with an F-connector (Cable In) and a RJ-11 (Data). Unscrew the two retaining screws and remove this card. There is an antenna-type connector on the inside that will need to be disconnected from the card.

2. Connnect the control box to the TV via the serial cable (Display Control).

3. Plug in power cables to TV and control box. Turn on TV.

4. There are two lights on the control box. Make sure the "Power" light is on solid and the "Status" light is flashing quickly. If not, cycle power on both the TV and the control box.

5. Press "Menu" and hold the button until the menu disappears.

6. Quickly, press "2 6 6 3" then press "Enter". A small menu should open in the upper left.

7. Scroll down to "DBox". Change to "Off". TV will restart.

8. Disconnect the serial cable from the TV. The remote controls should now work normally with the control box disconnected.

How did you disconnect it?? Antenna wire?? Power supply?? Microphone?? May be that you have a short in your coax in back of radio. Try taking it loose and screw it back in. Try new coax. Turn up Mic gain knob or change microphone. Make sure power wires are connected RED to RED(+) and Black to Black(-). Try grounding radio to metal ; if inside house ground to metal water pipes, filing cabinet, breaker box or meter box or 8 foot rod into earth. Measure SWR it should read 1.1 to 1.5. Measure power supply with Voltmeter it should be 12 to 15 volts. Check antenna plug in back of radio is my guess or microphone itself.

Yes this television definitely needs a converter box. It does not have a digital tuner.

did you switch the TV's incoming signal to digital antenna? For the cable box it was probably set to cable antenna or analog inputs, not all TV's have automatic switching for antenna feeds. My Mitsubishi has 1 digital and 1 analog antenna input and the cable box will only work through the antenna input if it's the analog antenna input and it's tuned to channel 3 or 4, -(or through a seprate HDMI, PROSCAN, SVCR,or a yellow RCA plug input)- and when the analog antenna input is selected the TV will tune all analog cable channels that the cable service offers if a box is not used. likewise the TV will not tune any channels at all if it's set to digital antenna inputs. It will tune all local channels only when set to digital antenna inputs.

When you have your converter box hooked directly with coax to your tv, is your antenna then plugged into your converter box in the "antenna in" port? What do you mean by it doesn't work? Does it say no signal? If so, you just need a stronger antenna. If not, you may have a defective box, bring it back to the place you got it and see if they can help.

how many times it flashes?? if its more than 6 times you have a problem. just lick the red wire that goes to the picture tube.if it does not kill you, you are lucky

Connect your outdoor antenna directly to your antenna in, in your TV see if it works and do the same with your cable input if it works then the A/B box is at fault.