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Re: RCA LED46C45RQ,Sound but no Back lights
Thank you for all your time.Will get back on after I check it outComment
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Re: RCA LED46C45RQ,Sound but no Back lights
bl 1 fast flash then offComment
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Re: RCA LED46C45RQ,Sound but no Back lights
THIS RIGHT HERE "What does the BL-ON voltage do on CON4" they want you to check the voltage on that pin, when tv is in standby and powered on, it's really pretty simple.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
Right now I have the tv apart checking the back lightsComment
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Re: RCA LED46C45RQ,Sound but no Back lights
5vComment
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Re: RCA LED46C45RQ,Sound but no Back lights
Let me check again don't want to tell you wrongComment
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Re: RCA LED46C45RQ,Sound but no Back lights
gnd 0
adj 5v
BL-on 5v win on , 0 win offLast edited by tennno`; 04-11-2022, 03:33 PM.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
Bl-on 5vLast edited by tennno`; 04-11-2022, 03:00 PM.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
back lightsAttached FilesComment
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Re: RCA LED46C45RQ,Sound but no Back lights
Make sure all the backlight connections are clean and not loose and have no resistance.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
all seems goodComment
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Re: RCA LED46C45RQ,Sound but no Back lights
Did you measure the voltage on the big cap both in standby and powered up? CAREFUL HIGH VOLTAGE, for those looking on that might not know.Last edited by nomoresonys; 04-11-2022, 03:39 PM.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
no not sure on how to do that. Are you talking about the big black cap on the hot side? there is only one that I can seeComment
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Re: RCA LED46C45RQ,Sound but no Back lights
The voltage across the main filter (EC101) will be the same in standby or ON (165vdc) there is no pfc circuit.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
not sure but some of your solder joints look a little suspect on that board, might want to touch them up a little.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
172.9 sb
169.3 onComment
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Re: RCA LED46C45RQ,Sound but no Back lights
examples of bad joints: https://www.google.com/search?q=bad+...ih=607&dpr=1.5Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
Don't see any I got a different board today its doing the same thing joints on this board looks goodLast edited by tennno`; 04-11-2022, 04:37 PM.Comment
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Re: RCA LED46C45RQ,Sound but no Back lights
Since you have the panel off, power up the led's with the TV's power supply and not if any led's are not the same brightness before it shuts down.
The backlight tester only provides about 10~15 ma of current and also does not monitor the current like the power supply board does, I suspect a led is failing when provided with a higher operating current.Last edited by R_J; 04-11-2022, 04:38 PM.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hello All
have seen posts on this model in here but my problem sounded different so thought i would create a thread
TV will not turn on
There is no standby light
When I press ON button for remote the red standby light does flash but no picture and no sound
From the back of the TV I can see the red light on the back of the mother board
Holding torch to the screen I cannot see a picture
I removed the back cover
Observing the boards I cannot see any damage
I disconnected the main board from the power supply
the back... -
This happened last Saturday and today I finally had time this morning before I went to work to replace two non brand capacitors
I will let you be the judge weather or not these are bad or not according to the blue ESR meter that I am using
I am comparing them to a brand new one that I installed
The display came back on and the programming was not lost which I was surprised by I would have thought that when the display went blank that so did the memory as well
I going to let it run for several days before I remount back on the wall next to the... -
Hi Guys,
This forum has been in great help to me, but I stumbled upon a strange problem with a salvaged Samsung TV that I am banging my head to troubleshoot.
PSU: L48S6 FHS BN44-00807D
T-Con: BN95-01937A
Panel: CY-GJ048HGLVLH
MB: NA (Currently as the TV is assembled and forgot to take picture)
As I said earlier I have some issues with the TV I got from a friend of mine. The TV had no picture, but sound, back light and everything else was working fine.
It was sent to an authorized service for repairs and returned with the... -
My LG tv started going dark a few seconds after powering on. I replaced the led back lights after doing the flashlight test. The problem I am having now is the bottom of the screen is really bright and the middle to the top of the screen is darker. I can actually see the individual leds at the bottom of the screen. Not sure why that is. I've tried lowering the backlight setting but I can still see the led's at the bottom, and the middle to the top of the screen gets even darker.
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