sony 27 trinitron wont quit flashing?

It's the X-Ray detection circuit over-reacting - I have the same problem with my 10 year old 32". Still researching the fix though. It's not a bad tube! Notice it doesn't happen on dark screens? That's because there's less radiation (Lower Voltage). To develop white requires all three guns-a-blazing (RGB). I'm waiting for the schematic and I bet it's a reference voltage too low due to an aging resistor or trim-pot setting shift.

mikecpage@comcast.net
March 2007

hi it does sound like the tube but it can also be faulty capacitors.if its flashing red green or blue bin it;if not take it for repair

dave
July 2006

Hi,you have a bad picture tube,time for a new set.

Jim
June 2006