The failure of the TLFA01365 is a very common problem in the P810 and G810
Viewsonic monitors. Measure the resistance and capactance between the high-
voltage anode and ground. It should measure open circuit for resistance (I
have heard that about 400 meg ohm is OK) and about 2.75 nano-farads
capactance. The bad ones that I have seen have had capactance of less than 1
nano-farad.
Your quoted price for the flyback seems quite low. I have purchased the
Panasonic TLFA01365 from MCM Electronics at $77.35 plus shipping. If you
purchase the cheaper one, let us know how it works. I have heard that on
some of these, the Screen (G2) voltage is not correct and you have to
modify the circuit to get them to work properly.
John