Remove the back off the LG TV - LG 42PX5D 42 in. Plasma HDTV

If you mean the original stand, place the TV LCD panel down on a table that is covered with a soft cloth. Look at the bottom center of the back of the TV and remove the 4 Philips head screws. Once the screws are removed, pull the stand away from the TV. The base can be removed from the stand body by removing another 4 screws that are at the top of the stand body.

See page 12 of the user manual available from the LG support page: https://www.lg.com/us/support/product/lg-42LG50.AUS . The current link to the manual is https://gscs-b2c.lge.com/downloadFile?fileId=KROWM000196216.pdf .

I hope this helps. If you have put a third party VESA stand on the 42LG50, you may have to remove the TV from the stand to reach the mounting plate.

Cindy Wells

LG TV Powers On and Off Intermittently. A TV that intermittently powers on or off is usually caused by the timer setting. ... With a TV that has a removable power cord, check whether power cord is securely plugged into the back of the TV.
https://www.lg.com/ca_en/support/product-help/CT20098005-1412238468277-intermittent-power-or-powers-off-on

https://www.lg.com/us/support-product/lg-43UF6400

The backlight is not working. Either power supply or led's

Lay the tv screen facing down on something soft like your sette or bed so the base is hanging over the edge.
At the back you should see screws on the base, if not visible they will be under a cover which should prise off

first your going to need to disconnect any wires from the tv. then unplug the tv from its powersource (ex- outlet) then make sure no power is still stored within its capacitor by pressing the power button for five seconds. then lay down a plastic mat underneath the tv. then your going to need a phillips head screw driver, an allen wrench and a small rubber hammer. turn the tv around and using the screw driver remove the screws from the back of the tv, on your particular tv i believe there are 12 screws in all. carefully remove the back panel of the tv. then using the allen wrench unscrew all of the screws that hold the boards and electrical components to the front panel of the tv. remove all components from the tv. (they should all come out as one entity) now take all of the components and place on the plastic mat you have previously placed on the floor. take the rubber mallet and beat the **** out of the components and the board. once it is in snickers fun size pieces replace back onto the front panel. then carefully (without damaging any parts) put the back panel of the tv on and put the 12 screws back in place. carefully wrap the entire television in bubble wrap and personally take back to the store and order the store supervisor to refund your purchase. he will inspect the tv and showing what a horrible job that the mexicans did at the assembly facility, he will gladly give you another LG 42" and an HDMI cable for your troubles...

no, honestly go to the options menu on the tv, check o make sure its not on a sleep timer or stand by mode, if the tv has been dropped, either by you our the store in which you purchased it, it could have moved a small coil that tells the tv to turn off (makes the tv think its over-heating once it reaches a small temperature) or simply call the manufacturer and ask wtf is up.

I find this guide about how to remove the Base of an LG LCD TV. Things You'll Need:
* Table or other flat surface
* Soft cloth or towel
* Phillips screwdriver

Instructions:
1 Unplug your LG LCD TV from its power supply and unhook any other cables from the TV.
2 Lay a towel or a soft cloth onto a table or another flat, supportive surface.
3 Lay the LG LCD TV face down on the towel, which will protect the screen from being damaged.
4 Use the Phillips screwdriver to remove the four bolts that hold the base in place. The bolts are located in the center of the TV near the bottom.
5 Slide the stand out from the bottom of the TV.
6 Press the protection cover, which is supplied with the TV, into the spot on the TV where you removed the base until you hear it click into place.
7 Re-insert the four bolts you removed into the holes on the back of the TV and tighten them with the Phillips screwdriver.


I hope this help; remember to rate this answer. Good luck.

If there is no LED burning to indicate there is power than the power supply is faulty.Repair is not verry easy to do with these complicated power supply's.

Pull Back off remove Lamp install new one Look on E-Bay for Lamps for LG DLPs

If you broke one of the base stand screw you will need to do as follow:

Remove the remaining screws of the stand and try to remove the stand, if you cant you will need to remove the back cover of the TV and then you will be able to remove the stand, remove the broken screw and put it all back.

It is pretty easy but if you feel you cant do it let me know and I can give you a detailed step by step guide.