We were away for a couple of days and when we returned we found the unit had no power. None of the LED's light up (no picture or sound), we tried a different power source with no luck. The unit is about a year old.
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Where I live there is a Schuck's auto parts...and they have a hand held diagnostic tester that plugs right in to your harness. This will tell you whats is wrong.It only takes about 2 min and they don't charge you.On my car it was the mass air flow censor.If you can't find a Auto parts store that does this...take it to a shop soon. Good Luck
Check your mains adapter plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. I suggest you get a quote first.
Check all battery terminals and 12v power feed connections are clean and tight.
Check all battery chassis and ground connections are also firm and in good order.
Check any in line 'Maxi' fuse connections are firm.
Check for water ingress in any cable loom or bulkhead connector exposed to the water spray.
I'm having same problem on my 2000 model rodeo 4wd 3.2L V6. Other day check engine light came on. I checked engine bay nothing abnormal, or power loss. Next day light was gone. 2 days later driving, a sudden loss of power and light came up. After idling for a couple of minutes, drove off with light still on but all power back. 1 hour later of faultless driving loss of power for a minute or so. Engine temp normal. Had break for 1/2 hour and set off for last hour of journey without fault except check engine light still on. Following dayon startup light went out???
Seeking help from experts.
My conclusion: A modern TV breaking down within such a short span of time indicates one thing: It is an inferior product. I have made a mental note of the Sylvania product in order to not ever buy that brand again. If I am asked, I will be glad to share my experience with that name brand.
What you've got it a busted backlight inverter... need to replaced a new one or repaired it. To repaired, if you are lucky just replaced a couple of faulty capacitors in the power supply w/ built-in inverter... Good lucks, have nice day!