A good page with some tests you can do on FBT's
http://www.noahtec.com/fbtest.htm

On Thu, 4 Sep 2003 23:37:32 -0600, "Dexter H"
wrote:

Hi , I recently obtained a Relisys ( model RE518B) from 1998. It does not
short or the such, it comes on and I get a standby signal on the LED
reguardless if there is signal. With further inspection, the flybacks HV
output is nothing. Does anyone have schematics for this or similar models ?
Or a method to test the flybacks hv coil ? Thanks
Dexter.