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The 2X blink indicates that either the Horizontal output transistor is shorted, or the RGB amp is shorted (on the CV board).
The Horizontal output is probably the cause, and as a general rule, the flyback should be replaced along with the H-Out transistor. Good news is that Sony is pretty good about having parts in stock. In fact, a lot of times they will have the A board with all the parts on it for only a few bucks more than just the flyback, so you basically get a new TV (electronics-wise).
Any decent repair shop should help get the parts/do the repair for you if you don't have the electronic experience.
Usually, in those Sony sets, a crack developes on a small transformer in the horizontal drive circuit, which causes the horizontal output transistor to short. This immediately shorts out the switching transistors in the power supply and blows the Sony 0.1 ohm resistor fuse. A shorted flyback (high voltage) transformer will also have the same result. The power supply does NOT need to be replaced. The parts should be replaced, the flyback checked and the board resoldered by a qualified tech familiar with Sony sets.
Yes, you should check other parts. The horizontal output transistor is more than likely shorted. Also the flyback could have gone bad. Some SONYs have problems with the horizontal driver transformer which is connected to the base circuit of the horizontal output transistor. If this little transformer has a loose solder connection, it will take out the horizontal output transistor.
This may give you some insight as to where to look for your problem.
The most common problem with TV was the failure of the Horizontal Output Transistor, this will also damage 2 transistors in the power supply and a resistor in the power supply also. (From memory): Horizontal Output location # Q501, 2 power supply transistors Locations Q601, Q602, and resistor Location R607. Also solder the Horizontal drive transformer, you can find it by following the circuit board from the base of the Horizontal output. Some models used an IC instead of the 2 transistors in the powersupply, it will have six legs and check like 2 transistors. Good Luck.