Turns on green light 5sec later clicks and goes back into standby mode all caps look fine
Probably not main board but a short on the y- sustain board or a bad power supply
how do I test the y dustain board and which board is it I presume the main bord is the one with the av hdmi ect then you have a board above that and then there is a board on each side if them two boards could you tell me which one it isFeb 21, 2014
Hi Stephen, Y Sus is big board on the left side. you have to remove it and check for shorted components with a DVM (digital volt meter) If you have no electronic experience this is probably over your head, but you can pull the board and have someone check it for you.
×
SOURCE: TV will not power on.
The clicking you hear is a relay that connects,
then disconnects the AC to prevent fire or further damage.
If it just fails to turn on, the main power supply is probably at
fault and without some technical background and a couple of test instruments,
you will not be able to do the repair yourself.
What
you can do though is; unplug the set, let it stand overnight or at least
several hours, remove the back panel and look for a separate board with mostly
larger components on it; it will have a ferrite core transformer on it and
several larger capacitors which are cylindrical and mounted vertically to the
board.
Before touching anything inside, especially on that board,
allow several hours to be safe since the larger capacitors can hold a painful
voltage charge for some hours.
There are likely two power supplies, a main (larger) and possibly a separate supply for the plasma display.
Without inspecting your set it is difficult to determine which may have failed since the high voltage supply may use an output from the main supply.
If you see signs of overheating such as discoloration of
the board material, it may not be repairable but if you can find a part number
on the board, you might be able to buy the power supply and install it
yourself.
If there are no signs of heat damage to the board, there
may be companies offering to repair it as a subassembly instead of repairing
the whole set which could be much more expensive.
If
you choose to replace it or have it done, the power supply still may not be at fault since most
are capable of switching on and off if a downstream problem is causing an
overload.
Not easy to diagnose without having made a few measurements first.
Testimonial: "Thank you for the insight, I will follow your suggestions and see where the path leads!"
SOURCE: LG 42 Plasma try's to turn on but just goes back into "stanby" ?
Check to see if you get Va and Vs voltages from the power supply. There should be some wires running to the y-sus. A couple of those wires will be labeled va and vs. Are they present? There will be a sticker stuck to the panel somewhere telling you what they should be.
SOURCE: my lg plasma tv stays on standby
is you already change the power board,is possible
your y board is out...is a big board on the left side of the tv
168 views
Usually answered in minutes!
how do I test the y dustain board and which board is it I presume the main bord is the one with the av hdmi ect then you have a board above that and then there is a board on each side if them two boards could you tell me which one it is
×