Black Screen after 5 mins. of use

It sounds like the entire screen goes blank with your problem. My problem is the lower half of the screen goes blank. Do you think the SSB is also the problem? What are your thoughts about the "Video Board" or the X Board?

Do you know where to purchase parts?

mine goes black with sound, after about 20mins, then off and on again. mounted fan in back cover from computer and no more problem!!!!!!!!!!!!!!!

I just got a call today (referring to my April 5th post) and the exact symptom and fix from "jdbouncer" was conveyed to me by my repair man. 3 red blinking lights, no sound or picture after about 5 mins are the result of a bad SSB board. I purchased my tv from Costco and they are extending the repair period to 3 years total (the 1st year would be covered by philips). I had to get denied service repair coverage from Philips with a case number and then find a costco certified repair shop and open a case with Costco (via proof of purchase / reciept). Costco customer service was great: ordered the parts and my tv should be fixed within a week. Thanks jdbouncer. Costco does not seem to communicate the longer service warranty but this is good to know. From what i have heard, they had too many tv's coming back after 1-2 years and they created a program to deal with them as a fix rather than a return.

Thanks Costco too!

Question when u loose picture do u loose sound also ? If so there is an 27Mhz xtal on the (SSB) small signal board that needs to be changed when it heats up it cycles out of phase. when it cools down it will work again till it heats up.