Fly back is not producing high voltages

good day since you have been already replaced the fly back transformer as you said so meaning the problem is not the FBT. any way here are some of my recommendation to isolate the problem .

1. unplug the tv unit and then unscrew to open the back cover and gain access the crt chassis.
2. now with use of flat screw driver remove the anode cap of fly back transformer make sure you discharge first for your safety.how are you going to discharge the voltage,get single wire then flat screw driver now strip one end of the wire and tie it to the flat screw driver the other end of the wire splice at the chassis ground of picture tube. and then insert the end portion of the flat screw driver to the anode cap to discharge the voltage left. you can now pull out the anode cap.
3. by this time you will turn on the tv unit place the anode cap in a safe position not to damage the board be careful its a high voltage. plug the power cord and turn on then observed if their is an arching at the anode cap usually a blue color just to know if the high voltage is present.
4. if their is a high voltage that means horizontal output transistor is good thats why the fly back transformer is on. your next step is to check the secondary voltage of fly back transformer with the use of digital tester or even an analog tester to know why their is no 1000v. check bad fusible resistor near the fly back transformer usually a 22ohms value this is where the 1000v pass through going to chroma board or video board. if open or no resistance pull out the said part and then replace with the same rating value.check also shorted diode connected to the resistor sometimes it was the cause why the resistor get bad.
5. after you replaced defective part insert again the anode cap for testing once again be careful.
6. now turn on again the tv unit then observed if their is a video on the screen check also the heater voltage at the chroma board if present usually about 2Vac something you will also noticed their is a light at the neck of the picture tube.
7. if the 1000V is present the heater and the B+ supply voltage i'm sure the video will come out. i hope those steps that i give to you will help to fix your problem thanks for choosing the fixya if you have further question i'm glad to help you.

You probably have a burned out high voltage transformer. That's what produces the ozone. Helpful hint...........the high voltage transformer is also the one used in bug zappers

Focus adjustment on a CRT monitor is a simple thing to do, although you need to open the case and there are HIGH VOLTAGES inside.

The adjustment is actually on the high voltage (flyback) transformer. There are two screwdriver adjustments, the one you want is labelled Focus (of course). Do NOT adjust the other one, you may destroy your monitor and injure yourself.

This MUST be done with a plastic adjusting screwdriver, NOT with a metal one. This transformer produces in the range of 25,000 volts, from the high tension lead on the top which plugs into the back of the picture tube. This lead still has very high voltage present, days after turning off the monitor.

If you don't feel competent to do this, that's fine, take it to a technician who is comfortable with it.

You have been WARNED of the dangers.

It's also possible that the lack of focus is a symptom of something more drastic being wrong, in which case you would probably think about buying an LCD screen.

check for Horizontal output transistor and flyback conditions..

In simple words, Fly-back is part of TV used to generate high voltage supplied to anode of cathode ray tube to attract electrons emission and produce light on front phosphorus coating. More details are available on Wikipedia Fly-back Transformer.
Regards,

The fault you are describing is caused by a faulty fly back transformer. The fly back transformer provides the high voltage required to light up the picture tube/s on the set. Other than the fly back transformer there are a few components that supply the fly back with power that may have failed. Generally not overly expensive to fix

I have same problem,it appears to be the flyback
xfr.

the monitor is bad.
its CRT monitor.
only googling find relic schmematics
you do know right the 2nd anode is at 15,000 volts right?
and that is lethal , right>?
zero 2nd chances.

no photos by you, so no answers ever possible on CRTs.
it works like old TVs did, only uses, different cathode drive
called DATA. (no tuner or radios inside, like TV)
the lines are my guess, caps bad in the Horizontal or vertical drivers for the yoke coils.
do not get killed playing with HV ok?

no problem with 450 instead of 400 volts..check Horizontal output transistor and Flyback!