You CEC is now over 10 years old, and a very nice transport, it could be the laser is getting tired.
The laser is cheap, and if your handy, easy to change.
The TL-1 uses a Sanyo SF-90 laser, very cheap, I would change it first for this small outlay.
http://www.ebay.com.au/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.TRS0&_nkw=Sanyo+SF-90&_sacat=0
Cheers George
The laser is cheap, and if your handy, easy to change.
The TL-1 uses a Sanyo SF-90 laser, very cheap, I would change it first for this small outlay.
http://www.ebay.com.au/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.TRS0&_nkw=Sanyo+SF-90&_sacat=0
Cheers George