I havent heard of this prob yet from mits dlp users. After my tv has been on for about 40 mins my tv wil flash for about 20 secs then the picture will wash out. Whites especially. Almost like a mirage. I replaced the ballast board and that didnt fix the prob. i cleaned and replaced some wires on the color wheel and that didnt do it either. Frustrated. has anybody had this prob, or know how to fix it. My tech thats looked at the tv is perplexed. Help!!