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Take the screen off connect power and watch LEDs if any don't flash its LEDs only needed to change faulty strip if they all flash its probably t con boards.
? 1:32
https://www.youtube.com/watch?v=FUqdi7lwmcE
May 29, 2013 - Uploaded by WastedOne2
Fix ya Soniq Tv once loaded up hit menu button then channel + then ... SONIQ LCD TV REPAIR Blank flickering screen Energy Saving Mode Issue ... Easiest TV repair - How to Fix Power [TV turns off, freezes, or won't turn on] ... Common easy LCD TV fix: bad picture screen rainbow colors - Duration: 4:04.
? 5:56
https://www.youtube.com/watch?v=xUzCLgoSPGM
Sep 15, 2014 - Uploaded by ShopJimmy.com
LCD & LED TV Repair - No Image & Blank Black ScreenFlashlight Test - How to Fix LCD & LED TVs ... Most LED TVs will have a t-con board, a power supply board, a main board and an LED ..... SONIQ Australia 1,718 views.
Hello Check the backlight inverter board to your TV. This is a common fault for most of the LCD TVs. If it is faulty, the backlight won't light up, resulting a balck screen with sound. This is the picture of the backlight inverter board to your TV. OK.
Sounds like the main circuit board fried. You can't repair it, thus replacement is the only option. That will not guarantee normal operation and your taking a chance one way or the other.
The
picture board on your monitor is bad, since it goes off after few
seconds and the power led or button is on, it means the
picture
board of your monitor has developed fault and will need to be replace.
I
advice you replace the picture board on the screen of your monitor to
solve the problem of the blank screen.
helloFive blinks - AKB circuit (automatic kine bias), the
timer/standby indicator blinks for about 30 seconds then goes to the
self-diagnosis function. Something is wrong with the video. Check video
out, Q705, 732, 761 and other components on the C board, also check
Q218, 219, 220 on the A board. In addition, unit could be in IK
blanking, try turning up screen slightly.
check if the back lamps are still on when you lose image, all you have
to do is get close to the screen and make is totally black and if is
not that means you have a back light working, but if the back light is
gone you may have a defective panel.
talked to samsung TA about
the same problem I had and the recommend to replace the power supply
first to confirm a defective panel because a panel is quite expensive
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