my toshiba dlp tv all of a sudden started making a buzzing noise when i start it up. the sound will work when i turn it on, but the lamp wont turn on, a hard knock in the back of the tv will get it working 90% of the time, i figure that should indicate a bad connection, right? i opened up the back of the tv and turned it on, i noticed a white-blue light coming from the lamp power supply, i figured this is probably an arc, although i couldn't see it directly because this part is burried from view in the back of the t.v. I called up customer support, and given the discription of the problem, they suggested that it was a problem with the lamp power supply, but replacing it would cost $60, so i figure i should try to fix what i have before i go spending that money. the only thing i can think of is that the heat sink is arcing, does anyone have any ideas what might be wrong? here is the part that i'm talking about **broken link removed**