Killed by lightning, have power, no picture...

Yep, power spikes kill. Power spikes kill all. Power spikes kill all forever. Replace all and get a new surge protector that costs at least $99. If you never need it it is called insurance. I am in FL the capitol of lightning. High priced surge protectors are cheeeeep when lightning is there.

If the power indicator doesnt come on at all then chances are its the power board if the standby supplies are not present.

what in he world is a live video feed?? must we guess?
NONE TOLD END TO END makers name and model and cable types.
RCA CCTV cameras (security) OR "'N" COAX RG59
or just what I can guess 10000 things here. for 30 years of video.
blew up the PSU

i bet your super secret video CAM is shorted top 120vac hot line
via RCA or N" coax cables.
one easy way to get that is rain into a camera (web) or CCTV
we had 4000 camera life were we worked ages ago.
and they used crud quality housings that leaked rain water or far far worse lightning hits, I put in full surge protection to cure all that.
Arresters + Transorb devices via interface.(arc balls too, ) ask.

THE PSU EXPLOSES INSIDE SHORTS AND BLOWS BREAKERS.
MOST PSU HAVE 10 AMP FUSE INSIDE, or
ONLY $15 chicom PSU lack fuses in a PSU but warning
some fuses are in the PSU transformer primary. hidden deep
see this
https://www.pcdied.com/PSU/PSU%20layed%20out.jpeg

water in the gear (cams) (mine are all 12vdc 2amps so not possible to do that.
or lightning hits, only weak hit can safe out arrestors

this is some unstated, flash DAC card in PCIe slot to CCTV ?
or to cable box
or TV card? PCIe.
no connections told at all nor what to.

I work mil ships and we fought this all the time, USN.
and more salt damage. endless.
lighting
surgers
and more
learn who to find the source of he surge,first.
then we fix that first.
or buy arrestors,

physically remove the power cable for about 10 mins then reconnect it no joke this is important

if it does not work the power supply is needing replaced

do you have cable or sky

well 4 year Tv's are just that now and unless its Digital it may not be worth the money to repair. Lightning spikes have killed off the ppwer supply box inside. The cost of replacement is $100-$150 ( if you can get one for this model) + 2 hrs minimum fitting at $90 hour. + your transport of this to a repairer.So it may be time to see that your next and new TV is connected to an anti spike power board and when not in use or a storm is imminent unplug it anyway

You might have had a power surge.Try unplugging your TV for 5 minutes and plugging it back in. If you cannot get a picture from any device such as a DVD player and cable then your TV needs serviced call a repair man. Good Luck!

Check the cable line thats attached to the bad set on another set side by side. If the other set still has no channels your going to need to trouble shoot or replace the tuner control bad and the tuner assy.

Sorry to here about your problem! This is the time of year I used to get tons and tons of sets, stereos ,games, and vcrs in for repair. On your panasonic it seems that maybe the surge took out the tuner portion or the power supply. It sould cost aprox. 200 bucks or so for a new tuner. Im sure your aware that homeowners will cover almost all repair after the deductable. Good Luck