Good day! We were watching TV when suddenly lightning occurred and our TV also turned off.What is wrong with this?

Check and replace the tuners. All might have been damaged due to lightning. This is a common fault occur to any TV, during lightning.
Electro help

good first shut off the outlet for what is looking like this with your tv connection problems with the drain tube of images giving us the inside source for capacitors in a technical lead for the electronic exchange of capacitors and diodes for your device

As an electrician, when someone loses more then 1 item of electronics in 1 day, its almost
always traceable to a nearby lightning strike, accompanied by a lack of surge protection for
the VCR/TV/Computer/Stereo/uninsured valuable electronic item/XBOX 360. Surge protection can
be provided by the consumer at the power strip (a good one with builtin protection and a
warranty costs $20, whereas a zero-protection 4-outlet or 6-outlet power strip will cost $4-$5).
Your electrician can provide whole-house protection, or per-circuit protection at
the breaker box, where a GFCI breaker (or better, an AFCI breaker) can be installed.
GFCI = ground fault circuit interruptor
AFCI = Arc fault circuit interruptor
Lightning protection is especially important in Florida, which is the "lightning capital of the world."
I've never found a good solution to lightning-fried electronics (random power supply components are destroyed), other than renters insurance or homeowners insurance.
If desperate, you could try replacing the entire power supply as a module, but even this provides
no guarantee of a fix - lightning damage can extend beyond the power supply.
When traveling, I will always unplug everything before I leave (except the security system),
and also turn off the breakers to unneeded house circuits (which kills the wall switches that
control interior lighting - forcing a burglar to use their flashlight instead of interior lighting)
which is the least convenient lightning protection, but highly effective, and cheap (free).

Seems like the problem of transformer inside the television. It might be damaged due to irregularities in voltage or during lightning. I suggest try replacing the transformer. It is very cheap. But when purchasing a new one get the best product available in the market or else you will face the same problem again sooner.

The power supply may be loose or needs to be replaced. Further testing should be done to determine. It may have a bad capacitor.

Also if you have a sleep mode on your tv, check to make sure it is not set on in the menu

Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} The best advice I can tell you at this point, is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! The kit comes with original Sanyo STK IC’S , not those cheap aftermarket or china made IC’S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases GOOD LUCK!!!
Larry Dillon, senior tech/tvrepairkits.com

try and unplug it, wait, plug back in and try it.

Defective HV transformer. (Likely lost it during the storm)...accordianman

check IC location 7532, Diode locations: 6536, 6562 IET, Inc.