Hello Fellas. I am working with this PTv model PRV-4663RK .Last time I post with out my schematic .Now I already have it from Treausrechest.Cutomer said It sometimes has highvoltage and picture.When I remove backcover And take board abit out. It never show highvoltage again.Findout IC3401 does not oscilate.Pin 14 is zero volt. I jump pin14 with pin15 .Because pin 15 has+5volt in standby. The set works one hour. Then customer call me It does not have highvoltage and picture again. Any body tell me How this IC is turn on ?What make this IC turn on(switched) when power button is pushed. THANKs Dang TD electronics ***************************************************************************** The Tech Address Book: http://www.tech-assist.org/secure/tip/contact.html Add a Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.html Lost Password: http://www.tech-assist.org and select "Lost your Login Info?". Email Archives: http://www.freelists.org/archives/techassist/