I have the same TV and mine has the same problem. I believe the number to call is 888-649-7669.
Here is a clip from someone's post in another thread:
I just received an email that Sony extended the warranty on the optical block until 2010.
Dear Valued Sony Customer,
Models: KDS-50A2000, KDS-55A2000, KDS-60A2000, KDS-R60XBR2, KDS-R70XBR2
As part of the Sony commitment to quality, Sony is announcing that it is extending the limited warranty (parts and labor), in the United States, on the optical block of the above-referenced 2006 model SXRD televisions until June 30, 2010, regardless of purchase date. For any customer who requires repair of the optical block on one of the affected models, Sony will cover the cost of the optical block repair (parts and labor) at no charge through June 30, 2010. This extended warranty does not apply to the replaceable projection lamp or the other parts that may be used in the televisions.
Sony is also announcing that for any owner of these model televisions who paid out-of-pocket expenses on or before December 31, 2008 for an estimate or repair service to replace the optical block, Sony will reimburse the customer by mail for the cost of the optical block and the labor expense to replace it, subject to certain conditions. To receive reimbursement, please follow completely the directions on the claim form for reimbursement; all claims must be postmarked by January 31, 2009. See the claim form for complete terms and conditions.
All other terms of the Sony limited warranty continue to apply. Sony utilizes a network of hundreds of qualified independent third-party servicers to perform in-home television warranty service. Sony, through its authorized servicer network, will endeavor to repair your set within 30 days of your first contact. For diagnosis, warranty service, or if you are not provided a repair within 30 days, please contact Sony at (888) 649-7669.