Another Garage Door issue

Garage door problems are on the rise and mine is experiencing another one.
This morning, the door went up and stopped about 3/4 open. I lowered it with the remote, then reversed to open again helping it along by pushing it up. When leaving for work, it would come down a partial way then go back up. I didn't have time to troubleshoot until now (after work).
This morning, I removed the center connector of the door to the opener for manual operation. Upon troubleshooting just now, the opener has a travel of about a 1 to 3 feet. I push the remote and it moves down, stops, then moves up on it's own. I disconnected the limit switches and tried again. The same thing happens. I increased up and down force but nothing. I know it's not the door causing the problem for many reasons but obviously, the main reason is it's disconnected. Therefore, it's in the opener itself but I have no idea where to even look. All gears, chain links, tracking, teeth, etc. are lubricated, intact, secure, etc. I'm dumbfounded. Any suggestions?
Thanks
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 8/8/2012 6:43 PM, Meanie wrote:

Been a while since I've had any problem but occasionally light and detector might get misaligned causing problems.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Wednesday, August 8, 2012 3:43:22 PM UTC-7, Meanie wrote:

Did you check these:
http://www.google.com/search?num &hl=en&site=imghp&tbm=isch&source=hp&biw66&bihb8&q=garage+door+safety+beam&oq=garage+door+safety+beam&gs_l=img.12..0i24l4j0i5i24l2.2289.11058.0.13962.25.18.1.6.6.0.89.1209.18.18.0...0.0...1ac.GZkfFCT97E8
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

http://www.google.com/search?num &hl=en&site=imghp&tbm=isch&source=hp&biw66&bihb8&q=garage+door+safety+beam&oq=garage+door+safety+beam&gs_l=img.12..0i24l4j0i5i24l2.2289.11058.0.13962.25.18.1.6.6.0.89.1209.18.18.0...0.0...1ac.GZkfFCT97E8
Which one? JK
Yes, cleared of any potential threat (spider webs) and both green lights are on.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Wednesday, August 8, 2012 6:15:27 PM UTC-7, Meanie wrote:

Are they loose? If they move even for a split second the door will go back-up and you'll never know.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 8/8/2012 5:43 PM, Meanie wrote:

Inspect the door closely while manually moving it to see if there's anything that could be putting strain on the door's movement in the track, such as a slightly bent door frame or a track out of alignment. That can cause the door to stick just enough to cause the opener to stop moving the door. If it's just a slight impediment, fiddling with the opener's force adjustor may do the trick. But if the opener needs a lot of adjustment to keep moving the door, don't rely on the force adjustment - fix the problem.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

As I stated, the problem continues even with the door unattached. I've been using the door manually until I can resolve this problem.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.