Sony 1-480-180-11 BALLAST THE BALLAST IS THE PART THAT POWERS UP YOUR TELEVISION'S LAMP WHENEVER YOU START UP YOUR DLP SET. YOU MAY NEED TO REPLACE YOUR LAMP BALLAST IF YOUR DLP TELEVISION SET DOES NOT MAKE THE USUAL CLICK OR POWER SURGE-LIKE SOUND WHEN TURNED ON. THE BALLAST MAY ALSO BE DEFECTIVE IF YOU HEAR CONSTANT Works with the following models: Sony KDF37H1000, Sony KDS50A3000, Sony KDS55A3000 Sony KDS-60A2000, Sony KDS60A2020, Sony KDS60A3000, Sony KDSR70XBR2, Sony KF50E200A