Accepted Answer

From the information you have provided the problem is likley a failed light engine. Pricing for the light engine is included below.

Parts Information

Vendor HATACHI Part Number UX23681 Description Lc47 Optical B. Asy Substitute Part UX23681D Estimated Weight 20 Lbs.

Estimated Ship Date *NLA* Use Substitute Part On Vendor P.O. No Core Price 1.00 Part Price 996.81 Total Price 997.81

As you can see this light engine is no longer available. The substitute for this light engine is included in the information above. There could be other parts causing the problem. There is no way to be for sure without testing the circuitry of the TV. Heat is the enemy of electronics, and these sets operate hot. You might wish to unplug the TV for an hour or more. If this power reset does not allow the TV to turn on component failure is indicated. These sets are assembled using the wave soldering process they are known for having cold solder connections. The safety circuitry shuts the TV set down when it detects a problem. This model of TV has over 3,000 parts which include millions of transistors inside the integrated circuits. The capacitors will change value, leak and become defective. Resistors will change value and burn. Integrated circuits and transistors can go bad. This can cause other components to become defective, which can have a domino effect and cause other parts to fail. Replacing one defective part may make the TV operate for a short time but the part will fail again since if the parts that caused the failure to begin with are not replaced. The only way to know for sure what is causing the problem, which parts that are no longer within factory specs and for proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment and the skills to use the test equipment. I wish I could tell you there was a quick fix or button to push that would fix the TV but that is not the case or the solution needed to get the TV operating correctly.

If you wish to repair it yourself what type of electronic training do you have?

What type of TV test equipment do you own?

Do you own and know how to operate an oscilloscope?

If you decide this is not something that you can do would you like an idea of what the cost to repair the TV will be?

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Regards,

Edward

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Expert:	Edward
Pos. Feedback:	99.7 %
Accepts:	4387
Answered:	1/16/2009

Technician

20+ years in TV repair. Electronics Technician for 40+ years. 50+ as a hobby.