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So Far You've Done Very Good, The Horiz Output Is Located Very Near Or On The Flyblack Panel, It 's Usually A Rectangular Transistor Mounted To A Very Large Silver Like Heat Sink ..It Does Sound Like It's Shorted, But If Not,Check The Focus Divider Or Hv Tripler..
The ticdk tick sound is probably the switched mode power supply making noise due to the fact that there is a shorted component inside(may be the horiz. output transistor). You may need to have service personell look at unit and get an estimate...this is older set n may not be worth repair
Its 2 times blink error code that shows +B volt supply (+135 volts) is shorted, most probably horizontal output transistor is shorted, replace it. If you are good in soldering parts in circuit board then take out horizontal transistor, check it, found shorted then replace it with same number.
Horizontal output Transistor Q502 number is 2SD2578 and available in Part Store for $10 Let me know for further query, if any. Thanks.
please check all the lights that are in the chassis hitachi puts led in the chassis so that if one of the lights are not working then u know that circuit is bad. now there is 2 things that hit has wroung in the units and that is a 2kv hv cap of the horiz output transistor that burns up and kill the power supply look for a small black or brown fuse it will not have glass on it it is rt behind the reg ic in the center of the chassis it allwas opens up because of the hv cap doonot run the tv without out that cap it will overload the horiz drive and will burn upo the horiz output but u have a very good ctv ther if u fix it will last u a long time and it is a very easy tv to trouble shoot.
Check all fuses in the power supply and look for any bad connrctions on the PCB. You are probably missing the 130 volt supply to the horizontal circuit. Common reasons are: Shorted horiz output transistor; flyback transformer, picture tube arcing , bad power regulator IC. In short, you need to get a qualified tech for this symptom. Hope this helps.