I bought the shcematics for this set and they indicate that if the light blinks 5 times there is a problem with IC4016. I don't know which board that is on as the schematics were unfortunately incomplete.
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If i remember correctly ten blinks means a high voltage error. The only thing you could try is unplugging the power cord then plug it back in and try turning on the tv. If it still won't turn on try unplugging the power cord for five hours or longer and try again. If it still won't turn on it would be best to find a local repair shop that works on sony tv's and have them repair it for you.
There is some problme in G Board (power supply board) in your Sony KP-46WT520 tv that is why standby light blinks 9 times.
If you are handy with electronics stuff repair and can test/ replace parts in circuit board then let me know to provide you more technical info to fix tv problem.
The DM is fine if the led isnt blinking. Your set is going into protective shutdown. Try pressing the menu and the device/input buttons on the set both in together for 5 seconds to see if the set will blink a series of blinks pause then blink another series of blinks. Such as 2 blinks pause then 2 blinks, Then let me know what the blinks were and I will assist you with whats wrong
When a Sony TV flashes five times, that means that there is an AKB circuit fault. Six blinks is also a fault related to video problems, and regards a fault concerning the digital board and the Jungle IC (the main CPU).
This means that there is something wrong with the video.
Try first unplugging power for few hours, if that does not work, call a
technician, as several IC and components must be tested and eventually
That's the LA-3 LCD projection unit. 5 blinks on that model means a lamp driver error. You would need the service manual to diagnose exactly whats wrong with the system. I have included a link where you can get the entire 121 page service manual for your set if you would like it. It cost 15.99 and they will email it to you and provide free support to help you diagnose it. Here is the link if you would like the service manual. http://servicemanuals.vstore.ca/
Does it blink a certain amount of blinks pause a second or just blink constantly with no pauses? Let me know it will blink a code if its going into protected shutdown. And it will blink constantly for another reason.