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Sony KDL-70R550a - no picture, 5 blinks    
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mysonytvsucks



Joined: 28 Sep 2015
Posts: 2
Location: ft myers
PostPosted: Mon Sep 28, 2015 7:02 pm    Post subject: Sony KDL-70R550a - no picture, 5 blinks Reply with quote
Hello users!

i recentrly picked up a sony kdl 70r550a and the picture seems to not work for me.
i recently changed the power supply board, main video board, and just changed the tcon board today.
tv starts up i get no logo at all, tv turns off and gives me 5 blinking red lights. if i turn the tv on again it will stay on but will not show anything on screen, no logo no nothing. just dims down. if anyone has any suggestions it would greatly be appreciated! thank you!
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JTS1957



Joined: 21 Jan 2009
Posts: 2388
Location: Far, Far Away
PostPosted: Mon Sep 28, 2015 7:49 pm    Post subject: Reply with quote
IF ALL boards were replaced by known-good ones, the panel is culprit.
LED back light bulbs can and do fail.
mysonytvsucks



Joined: 28 Sep 2015
Posts: 2
Location: ft myers
PostPosted: Mon Sep 28, 2015 8:07 pm    Post subject: Reply with quote
JTS1957 wrote:
IF ALL boards were replaced by known-good ones, the panel is culprit.
LED back light bulbs can and do fail.


i was hoping the panel wasnt my issue.all the backlighting turns on you can see it clearly through the metal holes Sad
JTS1957



Joined: 21 Jan 2009
Posts: 2388
Location: Far, Far Away
PostPosted: Mon Sep 28, 2015 8:32 pm    Post subject: Reply with quote
mysonytvsucks wrote:
i was hoping the panel wasnt my issue.all the backlighting turns on you can see it clearly through the metal holes Sad


Back light technology = LED back light technology
Back light type = (LED) Edge-lit

You can observe all of them simultaneously? It only takes 1 bad LED to kill them all.
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