Television Not Powering Up Intermittently

you must check the light indicator if how many times does it blink which tell the main problem or the error code of the tv. either the power supply doesn't work normally or the lamp need replacement.

There are several performance issues you may encounter with your Protron PLTV-37C LCD television.
Some problems include the television not turning on, issues with the TV's picture and issues with the TV's sound.
Depending on the type of problem you encounter, there are several options available to you to solve it.
Power Issues
Check the TV's main power cord. If it is not plugged in or is loose, securely plug it in to an electrical socket.
Unplug the television and plug it in to another electrical socket.
If the one it is plugged in to currently is bad, the television does not receive power.

Try turning the television on with the remote.
If that does not work, try turning the television on with the power button on the TV's front panel.
If that works, then remove the battery cover from the remote.
Remove the current batteries and replace them with fresh batteries.
Picture Issues
Check the video cables.
If they are loose or disconnected, securely connect them.
Adjust the television's brightness.
If the brightness is set too dark, images on the screen are extremely difficult to see.
Check the power indicator on the front panel of the television.
If it is red, the television is in power-saving mode.
Simply press any button on the remote to bring the television out of power-saving mode.
Audio Issues
Check the audio cables. If they are loose or disconnected, securely reconnect them.
Turn to different channels and adjust the volume.
It is possible that some channels are coming in quieter than others.
Access the audio options from the main menu. Check what audio setting the TV is at.
If it is set to "Mono," change it to "Stereo."
http://www.retrevo.com/search/v2/jsp/downloadPage.jsp?doc=dde1880d298054849d8c8adc90514f40&modelid=22971545&q=Proton+CS-37
Specifications for Proton CS-37 / PS-47

have you checked the relay on the power board had this problem before the relay was intermittently powering up then sticking

Hi what you can do is to buy a universal remote control for this TV to remove the child lock. You can get that online or on any electronic shops in your area. Once done here is the instructions on how to remove the child lock using remote.
Look at the "Power" indicator light on the front of the television to check if it is blinking. When blinking, the child lock is enabled. You can also check by pressing the "Power" button on the television.
Point the remote control at the television and press one of the buttons on the number keypad. The "Power" indicator light will stop blinking, indicating the child lock is turned off.
Lock the television again by pressing and holding the "Power" button on the remote control until the indicator light starts blinking. It takes approximately three seconds before the light turns on. Thanks

Please follow the troubleshooting steps:

1. Remove the batteries from the remote control.
2. Press each button on the remote control twice.
3. Make sure none of the buttons on the remote control are jammed.
4. Install fresh batteries into the remote control.
5. Make sure nothing is blocking the Infrared (IR) sensor on the TV.
6. On the remote control, press the TV FUNCTION button.
7. Press the POWER button and other buttons to test the operation.
8. Try using the remote control at varying distances from the TV.
9. Power reset the TV by follow the steps:

• Unplug the television power cord from the electrical outlet.
• Let the television remain without power for 60 seconds.
• Plug the power cord back into the electrical outlet.

The green lights on a Sharp television indicate a problem. The number of blinks is a code. The television has gone into a coma in order to protect itself. You can force this television on by doing this. Unplug the television. Hold down the vol+ and channel down button on the television and while holding them down still plug the television in. This is a temporary way to view the television but the problem will get worse if not repaired. Should the television power on this way unplug it when you want to turn it off without pressing the power button at all.

does the tv have an indicator lights that are lit on it while plugged into an outlet? check your power cord and the outlet. if you're still having an issue powering the tv on, you may need to replace the power supply board.

Hi

Make sure the AC cord is not loose or disconnected. Check to ensure the cord is firmly plugged into the outlet at one end, and firmly connected to your television at the other end. The AC cord connects to the television about midway across the back of the set, near the bottom of the back panel. The hole for the AC connection is shaped like a figure eight. Try powering up the TV with the cords firmly connected.

Check the "Main Power" to ensure it is on. Locate the button on the top of the television among the "Volume" and "Channel" buttons. Press the button to switch the television on. If the "Main Power" button is off the remote will not turn on the television. Wait to see if pressing "Main Power" will activate the TV.

Press "TV Power" on the remote control to power up the TV from stand-by mode. If the power light on the front of the television glows red when you press "TV Power" on the remote, press the "Main Power" button on top of the television to remove the TV from stand-by. If the TV is accidentally in stand-by mode it may not come on when pressing certain buttons.

Check the circuit board. If your set still won't turn on and you hear a clicking noise when you plug it in, you most likely have a defective circuit board.

this sounds like typical power supply problems. these units have a stand-by power thats always active;even when unit is off. this allows the settings to be remembered by the u-con. (microprocessor) when you unplug the unit it will reset to factory default, thus erasing faulty power-supply data from improper voltages.(usually low readings) swollen capacitors on power-pcb will effect operation. recommend replacement of all electrolytic caps on power board. even smd's (surface-mounted-devices) can be leaky. they can be checked in circuit with an ESR meter. this is an analog sweep meter (needle gauge, not digital) that can detect faulty, leaky capacitors.

how did you get that number?