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The control board to your range may have been damaged because of the lightning storm. It happens when lightning strikes a power line and sends a surge of power to your home. This large current surge can easily damage electronic circuits. More often than not if a device is on and lightning strikes, that is when the device gets damaged. During large lightning storms it is best to turn off all electronic devices. The electricity going to your house is fine now and that is probably what your electrician checked.
Unfortunately modern televisions and monitors are full of electronic semiconductors of which many are likely have got destroyed along with your original power supply during the storm. A nearby lightning strike will send high voltage spikes down aerial cables as well as through socket outlets. If you have contents insurance you should be able to claim for a new monitor.
That problem is usually have 2 causes..Its either power supply board or main board..
Please take this steps on how to determine the problem: 1. Open the back cover. 2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter.. 3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board.. 4. If the power supply output is normal..The problem could be on the main board... 5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board.. 6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV.. Hope this solution will be helpful..
The defect is likely a sensitive component to over voltage (lightning) on the main power supply. But you should not exclude other boards too, since ohter board also have local power supplies and sensitive CMOS integrated circuits. Check all MOSFET transistors on the the main power supply, since they are the most sensitives. Also the regulator IC to control the PWM sent to the MOSFET is made of CMOS (sensitive). Then check all the diodes even if they are more robust to lightning. There is a MOV that absorb the lightning that could be shorted but in your case it seems to have survived.
You have a diode arrangement in your power supply that converts the AC power to DC power so that it can be stepped up to operate the high voltage power supply of the set. If those diodes are blown, which happens frequently in a storm, then you have no voltage to your high voltage. You are going to have to check that diode arrangement by making a continuity check both ways on each diode. A diode blocks voltage one way but lets it pass the other way, thus producing a DC voltage.
I'm afraid the electronics have been 'spiked' by the lightning. It may have affected more than one module There is little you can do other than having it looked at by a professional, however you may be able to claim on your insurance? Regards
It is most likely the power supply burnt out. The capacitor's inside are made cheaper than the o'l days and get overheated easily. You can test capacitors with capacitor tester and service manual. You can test power supply output voltage with just a voltmeter
During a lightning storm, a lightning strike could have induced a high voltage surge in your incoming power lines. Left unprotected from these power surges, the weakest link ( normally low voltage electronic controls) are the most susceptable. Just because you had power available at the wall receptacle after a storm doesn't mean that your washer control system wasn't exposed to one of these surges and got damaged. On the contrary, it is extremely likely that the washer took a 'hit' and was damaged.Other devices plugged into the same receptacle may have survived that hit because electricity travels the path of least resistance.. In this case.. that path may have been thru your washer.. My point being is that your washer could have sustained a power surge and was damaged so don't rule that out. Of course, that surge could have taken an internal fuse or other component out too..