My sony crt tv model no kv-tg21l70 have 4 blink i replace the vertical ic but it has no change so what shall i do?

Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505
Vertical sweep failure. Check all the solder terminals to vertical output IC. If it do not help, replace that IC.

Hello
Vertical IC inside your Sony TV has damaged [shorted]. Four blinks of standby light denotes it. The number of blinks of standbylight in Sony denotes some fault, and can be determine according the the continueous blinks. In your case, the standby light will blink four times, then stop for a while and will continue to blink four times and so on. Vertical output IC should be replaced with same type and number. If you are aware in electronics and have tools, you yourself can do the work.
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Your vertical IC will need resoldering. If you can take this board out and inspect the pins under the vertical IC, you will see rings around the IC. This is a common problem for you model of TV. Hope this helps...show a few hands of support.

4 blinks means vertical section is faulty. check the supply of vertical ic +/- 15 volts if present. if these voltages are present, re-solder or replace vertical ic.If not, check for faulty fusible resistors and rectifier diode near fly-back transformer.

you have power issue. short the prongs for a minute. then remove the short wire. then test. if not succesful go to your nearest service center.

4 times standby light blink shows problem in vertical deflection section of TV.
Please check and replace vertical output IC in main board.
Thanks.

Hi
In sony tv`s the 4 blink code(sony error codes)usually means that there is a vertical deflection problem.
It is often caused by a faulty vertical output i.c and/or related components. If you feel handy with a soldering iron let me know and i`ll help you with it.
Hope this help Merry Christmas

error code 4 is vertical deflecton failure . replace the vertical deflection ic. and the electrolytic capacitors in the vertical circuit. Or if you are lucky just resolder the vetical IC and resolder th horizontal section too.

Hiii...

My version is :
For safety reason you should replaced them ( Horizontal ic,Vertical ic, Deflection ic) and olso all the big capasitor nearest the ic....that's my version....if you have big budget for it....he..he....

Thank's
[Vrya]

you have defective vertical IC! the supply of Jungle IC is from the vertical output!