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Old 08-14-2020, 05:40 PM   #5
budm
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Default Re: Panasonic TH-50AS700 - Can I rely on LED tester results?

Quote:
Originally Posted by senakahks View Post
Hi, I am new to TV repair and I have Panasonic TH-50AS700 TV to repair. It goes off when I change the HDMI cable or sometimes it goes off itself after some time, say half an hour. Once it goes off, the red bulb blinks continuously (should be a single blink) and can't turn on using the remote. When I turn off from the wall, it works again.

I tested LEDs without opening the case by giving supply of a Chinese LED tester via a ribbon cable. all inputs yields the same voltage. Does that say all LED strips are good?
Does it stay on longer if you reduce backlights to 50% or less?
The LED tester you have probably puts out 30mA not in the hundreds as in operation in TV.
What inspection and Voltage testing have you done when TV works and when it does not work?
Can we see the pictures of the whole backside of the TV showing all the boards so we can see what we are dealing with?
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Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809

Last edited by budm; 08-14-2020 at 05:42 PM..
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