Question about Olevia Televison & Video

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Olevia 542 LCD TV will not turn on. If I unplug the TV, wait 5 seconds, then plug it back in, it will turn on and operate normally in all functions. If I then turn it off it will not come back on without unplugging and re-plugging. Any ideas? I have already seen solutions for other Olevia TVs that had similar problems (involving capacitors on the power board or the ceramic fuse) but none for the 542 with this particular problem. Thanks in advance.

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Posted on Jan 02, 2017

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SOURCE: To kb8ez re: Olevia power supply problem

necesito el power alimentador de energia de mi tv LT37HVS Olevia
espero respuestas mi correo es luis19rpm@hotmail.com

Posted on Jul 10, 2009

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SOURCE: Olevia lcd tv will not turn on.

First you want to unplug the tv for a few hours to reset settings. Plug it back in and then switch the master power switch off and then on.
There is a master Power Switch next to the power cord receptacle, make sure that this switch is on the on position and the blue LED in the front is illuminated (Note: The switch in the rear of the television is in the on position when the line is depressed).
This should get your tv working again. Just needs a good powercycle.

TECH just worked on a tv I just tried it on.

Posted on Feb 25, 2010

freelance-au
  • 131 Answers

SOURCE: I have to unplug and plug back in to get tv on

This will be down to bad capacitors in your power supply, Take the back of your tv look at the power supply and look for bulged capacitors ( domed shaped on top ) they may also be leaking a brown liquid substance, replace these and that should cure the fault.

Posted on Mar 05, 2010

  • 16 Answers

SOURCE: Tv wont turn on

Replaced two N-Channel Mosfet transistors(FQPF13N50CF-ND) and some faulty electrolytic caps in the power supply. I found the Mosfets online at Digi-Key. Mosfets are difficult to read. Only one read bad but I replaced both because they are in the same circuit. Set works great now.

Posted on Mar 30, 2010

  • 1 Answer

SOURCE: alarm led on samsung pcb model #lj44-00025a

I had a similar problem with my 42" set, a re-badged SAMPO unit bought during 2002 in the UK. It was working one day and when turned back on the next day there was no picture. The clicking noises that occur when the set is switch on happened but not in the usual pattern. The symptoms were the same as a fault it had approximately 10 months after I bought it, although it was then repaired under warranty by swapping out the PSU.
I took the back off the set and confirmed it had the LJ44-00025A PSU board. When first plugged in the green LEDs on the PSU would light and the relays would click. There would then be a short buzzing noise, the relays would click and the green LEDs would go out. The red "Alarm" LED would then light.
After reading posts on a number of forums pointing to the PSU being at fault, I ordered a replacement PSU from ADC in the US ($139.00 + shipping) but that did not fix the problem. After downloading the service manual I then followed the instructions to check and set the PSU voltages, during the time that the three green LEDs were lit. I found that the VA value was zero and the others were a lot lower than they should have been. The service manual shows that the voltage tests are carried out with most of the sub-boards connected, except the Image Board and front panel switches. I then disconnected each connector in turn from the PSU and found that when the connector for the Logic F-Buffer board (LJ92-00601A) was disconnected the PSU would not alarm when powered up and the five voltages were close to normal. I found a replacement 2nd hand F-Buffer board on fleabay for about £17.00 and once fitted I re-tested and set the five voltage levels for the PSU. The TV is now working as well as it ever has. I have since tested the original PSU and confirmed that it also works, although the voltage levels needed adjusting. I hope this helps.

Posted on Jul 06, 2010

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Replaced two N-Channel Mosfet transistors(FQPF13N50CF-ND) and some faulty electrolytic caps in the power supply. I found the Mosfets online at Digi-Key. Mosfets are difficult to read. Only one read bad but I replaced both because they are in the same circuit. Set works great now.

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This should get your tv working again. Just needs a good powercycle.

TECH just worked on a tv I just tried it on.

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