Hi I have a Magnavox fp4360-w104 ptv620 and would like to change the blue coolant fluid. Someplace I read that you can suck out the old fluid with a shop vac and a small hose. Will this work? Where is the filler plug? Is it the bellows looking thing on the front side? I don't want to break anything! Sorry if sound dumb but I have been servicing tv for 30 years and never had to work on a projection tv. Also is all replacement fluid the same? Thanks Kevin