Jaime, I replaced the p5nk50zfp regulator. The fuse does not blow any more but the tv still inop. I rechecked the regulator I installed and this one went open. Installed another regulator but TV is still inop. Any ideas? I don't have a diagram so pinpointing is tough. If possible give part # if have any ideas what may be.
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Re: More help needed
The only suggestion i have is that you could have a defective flyback transformer if still not turning ON.
You should check B+ voltage and see if it gets to the horizontal transistor, if it does; chances are that the flyback is defective on this TV.
I looked for an schematic, but no luck find one. Looks like they do not exist.
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If you see a light on the front panel, is not the fuse but something else in the power supply circuit board or could also have damaged the main board due to the poor voltage regulation of these power supplies.
ok appaloosa! is the fuse blowned again? if blow you have fault unregulated power section, you have defective parts like.. leak degausing or defective diodes or capacitor and or regulator IC. 2nd. defective horizontal output. if not blow the fuse u have fault oscillation!
The fact the set blows up the correct fuse is because it has a short ahead in the circuit,it could be one of the diodes(4) that is shorted,if one of these guys is bad all of them should be replaced with the exact replacement,ahead of them it should be a regulator and he is bad (shorted) it could have taken the diodes and the main fuse.The cause might have been a power surge.If you are familiar with tv service you can check the regulator and the diodes before you put in a new fuse,if you are not too familiar be safe and take the set for an estimate.If you suspect power surge or lighting damage it might not be worth repairing.Let Us know if you need more information.