Re: Samsung LN40C540 Turns on when it wants to...

LOL...I just finished trying that exact thing. I came back to my PC and read your message of telling me to do so. I have seemed to narrow it down to an smaller area. let me have a look for the voltage regulators.

Re: Samsung LN40C540 Turns on when it wants to...

Tom66 what exactly would you like a picture of? I would be happy to take one.

Re: Samsung LN40C540 Turns on when it wants to...

I have not physically located a relay. I believe an IC is controlling the same function. Either way, when something on the board heats up it cause the TV to not turn on properly.

Re: Samsung LN40C540 Turns on when it wants to...

Ok so here are the results...

The i.f. board (the input board) was gently heated with a hair dryer to see if heat would allow it to turn on all the time and function properly. This did not work as mentioned by Th3_uN1Que, but it did however give me an idea to test the opposite extreme.

I took the I.F. (input) board off the case placed it in a zip-lock freezer bag (to eliminate moisture) and placed the board in the freezer for an hour. I took the board out of the freezer and hooked it up right away......

Re: Samsung LN40C540 Turns on when it wants to...

The problem is that there really is no consistency with the issue. sometimes it requires 2 minutes to turn back on and sometimes it requires 20 minutes before i can power it back up.

Now not sure if this test helps but...

If I turn the power on, and the TV does nothing. If I unplug the input board from the power board the backlight turns on. This would lead me to believe that the input board is acting up and that its when when it is plugged in it does not let the screen come on. Again guys im sorry for my...

Re: Samsung LN40C540 Turns on when it wants to...

Well wouldn't that theory contradict what the issue is. If heat (a blow dryer) would cause it to kick back on. My issue would be i would have to let it sit for 20-30 minutes before turning it back on. that means it would cool down in order for it to work properly.

Thanks in advance for taking the time to read and possibly help me with this issue. I tried searching for this issue but none specifically matched. Also, I would like to apologize in advance if some of my terminology is incorrect.

I have a 40" Samsung Series 5 LCD TV. It was purchased approx. 2 years ago.

The issue first began with when the TV was powered up it the standby light would flash 5 times and nothing would turn on. No sound, No backlight, and the standby light would remain off.

I would unplug the TV wait 10-20 minutes, plug back in and...