It is likely that the STK is damaged and so it goes off but you have to be sure.
What I do when I have a similar problem is to look for the ceramic resistors (white) that are in front of the STK and measure in each of them (very carefully) if there are any DC voltage.
Black to ground and red to each pin of all resistors, if you find any voltage in any of these resistors, it is certain that the STK is damaged.
You can disconnect the module from the CD to measure.
Before disconnecting the flex, you must unload the capacitor that holds with voltage to the micro and you can do it with a cable with a resistance of 1k to 2 watts soladda to one end and the other end to earth, this to avoid to damage the micro.
One question .. Do you have the diagram?
It does not serve as replacement, the pins you use are not similar to the STK433-320.
The STK412-240 has 18 pins and is 2 channels.
The STK433-320 has 19 pins and is 3 channels.
You must replace with the same registration or in your case because the STK433-330 is the only one that serves you.
thanks mate, now if I put one of less value I would last a short time the equipment ?, I think that happened to me with one that repairs replacing stk of less value, thanks.
thank you mate, I know I have a sony model HCD-GTR33 which when you connect it to the mains power for about 3 seconds you hear the exhaust air that is working, but after 3 seconds it goes out and the led is flashing, me does question if it would be the TDK, I do not know what opinion I would give, thank you.
well many thanks partner, know end and sierro the post with the last doubt, know I have the stk 412-240 to remove it from a computer that is almost the same as the chassis of the plates ie the same form of plate where the stk goes, components (regulators, R ..... shallow) uses the same RC that are in front of stk ..... practically the same, could replace with this stk, or the main thing is that respect the beginning of stk (the original was stk433 and this is stk412), thank you.