Question about LG Studioworks 45 14" CRT Monitor

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Set dead power supply failure

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Hi there, power supply prob., test first the fuse, then the rectifier diodes, the regulator and resistors. do some check up at the power supply section. ty

Posted on Feb 01, 2008

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Could be an open internal fuse or power supply failure

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Obviously there are no error messages, so it isn't a simple failure.
Several reasons:
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hi, there seems to be dead short somewhere i'd unplug all the leads from the power board and plug one in at time, then power up the set to see which board is blowing the power supply hope it helps

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Why don't my haier tv come on when i press the power button or remote


Power supply is most likely the issue---or set is had a failure elsewhere that prevents it from working. If total dead it could be the fuse the power cord goes almost directly to.

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1 Answer

Tv does not come on with off on switch or remote. Set completely dead. VCR doesn't run either. Fuse is OK and circuit board looks like new. Nothing looks overheated.


Quite possible that the fault is relative to the power supply of the TV. So it is important that the voltage is measured of the output in the SMPS - switch mode power supply.
If there is no output the SMPS is faulty , failure of driver or frequency oscillator.
Please check the link below:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Once the power supply is restored the voltage feed to the processor and sub sections must be checked, for failure of any regulator or fusible resistors

Jan 19, 2011 | Televison & Video

2 Answers

LCD panel menu not working ... all buttons dead. Is there as reset button anywhere?


I presume you have already tried to turn the mains power off and on again.'

When you say all buttons are dead does it also mean all the lights on the top of the panel are out?

Could be the controller has lost power.

Please confirm the situation.

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1 Answer

No picture or sound


Make sure that there is actualy power going to the AC power source where the TV is plugged in. You can re-set the TV by disconnecting the power for about 10 seconds and then connecting it back again. If the set still does not start it will require service.

If the set is dead it is most likely the main power supply board that failed. The service tech would replace the power supply and also investigate to find the cause of the failure. Sometimes another board could have a failure and cause the power supply to be damaged.

If the set will not start up, it will require shop service. You can call Panasonic tech support to find out the authorised service rep for your area. Check to see if the set is still under warranty. If not, it will be expensive to service.

Jerry G.

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1 Answer

Sony KV 27S15


The power supply may have failed components. It is also possible that there is a failure in the scan amplifiers and in the high voltage sections that caused the power supply to fail. There are a number of scenarios that can cause this type of failure.

The set will require proper troubleshooting to service it. These types of failures will usually not show anything visually.

Jerry G.

Jul 13, 2008 | Televison & Video

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