Samsung HLM507WX/XAA getting hard to turn on

Plasma is old technology and it is 16 years old and made in Mexico, the worst place for quality control. It is time for a new one, or at least an upgrade. Or you can get a board kit and take a chance on fixing it.

Samsung HPT5054X/XAA Service Manual

ManualsLib https://www.manualslib.com > ... > HPT5054X/XAA

View and Download Samsung HPT5054X/XAA service manual online. Plasma Display TV. HPT5054X/XAA plasma tv pdf manual download. Also for: Hpt4254x/xaa, ...

Boards for it.

https://www.google.com/search?q=Samsung+plasma+tv+model+HP-T5054+board+kit

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Check the capacitors on the power board. Samsungs are known for faulty capacitors.

Check for the timer settings if possible reset to default......

I just fixed this very same problem. The capacitors are the problem. However, I think that if you have some minimal skills with soldering, you can fix this yourself. You just need to take out the system board, then the power supply parts are on the top right. The bad capacitor(s) will be bulging at the top and possibly have some brown stuff coming out. The ones that go bad are 1000microfarad, 10V, however you can replace them with higher voltage. I got 35V caps from radio shack for 1.59 each. You just need to solder out the bad ones and then put the new ones in and solder. Remember that the negative end goes on the side with the bold black part of the circle on the system board. Then just cut off the extra ends of the capacitors. If you are capable of doing this yourself, you will spend at most 6 dollars instead of however much a technician costs.

The first place to start is with the Main bd. The second cause would be the T-con bd. Have a trained Samsung tech troubleshoot to find out and repair the set.

had the same problem, same tv... bad connection on a transistor....

it could be the bulb on the way out, they don't like to turn on if the inverter does not get a voltage use from the bulb, while trying to turn on the tv look at the vents for the bulb if you see it flicker on and of while trying to turn on the tv when it would be the bulb. when the tv is on and work hold a peace of paper over the vent not to cover it but to look at the bulb light if you see a flicker or bright and dim and repeats doing this then the bulb is warn out. if you hear clicking or scratching sounds this could be the inverter board on it way out.

Hi..your temp. sensor tells you when your lamp is too hot and could possible melt your engine. That is why your TV shuts down. It could be your lamp fan is not working or not working good enough to cool your lamp. You may need to replace it and very easy fix.

I had the same problem with a 52" Samsung LCD. I found 2 electrolytic caps with bulging tops on the power supply board. (see pic). I looked to be the 5v section but I'm not sure. I got replacement at Fry's for $1.90 each. All is well!
Ahwatukee Al