any help is much appreciated!

thanks!

reba

I agree with the guy on the phone you must have outside interference coming from somewhere. Computers, cars lighting in the garage??? In extremely rare cases. I would talk to your neighbors and see if any of them might be having the same issue. It could be some construction going on in the area, a new cell phone tower near by, utility companies doing some work in the area. I have encountered each of these problems before. I had a guy tell me one time Mon-Fri his remotes had no range but Sat and Sun they were fine and it was because the telephone company was in the area working Mon-Fri and not on Sat and Sun.

If none of these are the case, can you back track and think of when this problem first occured? Was there anything around that time that you bought new and put in the house or garage. Did you change cable companies or go to dish? I would start looking at those things first. If they worked fine since Feb. I would think there has to be some type of explanation especially since it affects both of them at the same time. Let me know if you find anything out, this is an interesting one.

I called customer support. They told me it could be interference as well, but the first GDO still works! So they sent out a new remote, but that didn't solve the problem.
I called back and they sent out a new receiver board and that did the trick!

The chances of getting 2 bad GDOs is pretty slim I think, but you never know. I would ask customer support to have the service guy replace the receiver board. Its worth a try anyway.
Its strange the service guy got it to work fine for a couple days last week?

Any alarm system that might have wireless devices?

Do ask the neighbours if they're having problems too.

Garage door remote not working? The Pentagon may be to blame.
Not because of any grand conspiracy theory, but rather the mundane use of a radio frequency the military hadn't used much before.
US homeowners in coastal Orange County, California, are among the latest to discover this quirk. There, signals from Naval Weapons Station Seal Beach have been interfering with garage door openers as far as half a mile (0.8 kilometres) away since March.
That's when testing began on a new radio system that will allow the base to network with local fire and police agencies during emergencies. The frequency falls in the range of 380-399.9 megahertz, a band long reserved for the Department of Defence but rarely used.
"We hadn't had the need to use these frequencies before. As a result, garage door manufacturers began using them because they were pretty quiet," said Gregg Smith, a spokesman for the Navy station. "With the explosion of communications technology over the past 20 years, the DOD has been squeezed to use bands it didn't need to use before."
Reports of interference with garage door openers near military installations have been reported from Rhode Island to San Diego to Hawaii.
"Out of the blue, the garage door just stopped working," said Bill Davey, 51, of Norco. "We changed all the batteries in the remotes. When it still didn't work, it was like 'What's going on here?' "
The culprit was a Navy installation a quarter-mile (0.4 kilometres) away.
The Federal Communications Commission allows the so-called unlicensed use of frequencies for low-power purposes such as garage door openers and vehicle key fobs as long as they don't interfere with government communications systems, Smith said.
Smith said he's fielded 16 complaints from people near the Seal Beach base, but he assumes the interference is affecting many more. People can buy a device to retrofit their openers to another frequency; Davey's cost $US60.
"Once you explain how it all works, folks aren't happy, but they've been understanding," Smith said.

I'm not sure the $US60 is realistic.