There can be many things that can cause a jumping or unstable picture. The power supply is the starting point. You would have to be able to monitor the voltage outputs to determine if there is instability.
Then there is the testing of the circuit boards by monitoring the proper waveforms, as per indicated in the service manual. You will require the proper test instruments for this. Once the defective board is found it will have to be replaced.
If the set is out of warranty, it may be more worth while to replace it. Servicing out of warranty can be too expensive to be cost effective.
79 views
Usually answered in minutes!
×