We have no picture on our Panasonic TV

@michala78 anything but the LCD screen is always fixable by anybody. All you need are some basic hand tools and a multimeter to check a few things out. Your TV’s issue sounds like something related to either the power board or the backlight LED’s. Take the back cover off and check all the boards for any obvious damage. Post some good pictures of your boards with your question 在已经存在的问题里加入图片 and include the label identifying your TV. I do suspect that this is an LA59 chassis which will help us to assist you with the repair.

See if you can still do this for your TV:

7.3. LCD Panel test mode

Purpose:

To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.

How to Enter:

While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of the remote control three times within 2

seconds.

How to Exit:

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

How to confirm:

If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.

And then, judge by the following method.

Still abnormal picture is displayed: The cause must be in LCD Panel.

Normal picture is displayed: The cause must be in A board.

Remarks:

The test pattern is created by the circuit in LCD Panel.

In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.

If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.