The problem is most likely a damaged spring end cap. As you face the screen from the front, this is the cap that covers the right end of the cylinder that encloses the screen material. The cap is held in place by 3 Phillips head screws. If you remove the spring end cap, you will see a slot in it that is designed to hold the spring assembly stationary as you pull down on the screen. If this slot is damaged, then the internal spring inside the roller will lose tension. The fix is to pull out the screen & roller assembly, roll it back up manually, then replace the spring end cap with a new one. (I believe the part # from Quartet Apollo is K0329). The cap at the other end has a cup receiver designed to accept the pin end that is on the left side of the cylinder that houses the screen material. The tricky part is fitting the pin end back into the pin end end cap. It is easier with 2 people. If you fashion a short hook out of a coat hanger. you can use it to lift the pin end into the pin end cap. There are part #'s and exploded diagrams on the Pegasus part sales website: http://shopping.netsuite.com/s.nl?c=440001. The site is down now for maintenence, but it should be back up soon. HTH

A leather belt did the trick for me... feed it around the spool and use it to roll the spool forward to a point where it will retract again.

For mine, I had to:
1: Remove end cap with square base (the non-rotating end) - 3 phillips head screws. Yes, phillips, not pozzi.
2: Manually roll it up around the spring core,
3: Loosely fit the end cap, and rotate it until there was sufficient pre-tension to roll the screen to that point (about 5-6 turns on mine)
4: Attach that end cap in place with the screws. The free rotating spindle had come out of the other end, but thats OK.
5: Stand it vertically, fixed end down, (so the screen wouldn't pop out of the square housing), and take off the other end cap
6: Relocate the spindle in the end cap and attach the end cap.
7:Hang it up, and test it.

I subscribed just to say thanks a million, Mr. umright!!!

I thought I ruined my screen even before properly installing it, but your leather belt trick was pure genius! It took a little effort, but I was able to make my screen roll up again without dismantling it!

I started to roll the screen back up with "clean" fingers...it started slow then began to roll itself up. I had to extend and roll up a few times to get the screen tight on the roller again, but it.worked great.

The new web site for all Apollo and Quartet projection screens spare parts is www.pegasusavproducts.us