Sanyo DP42647 back light problem
This is my first post so it may be sketchy. The fore mentioned Sanyo has sound and video. When I first turn the set on it has a picture for just a second then goes dark. I've searched the forum over and can't find a similar symptom. Everything seems to be fine but there is just no back light. Thanks in advance for your help. I've been in electronic repair in one form or another since 1972 but just started back in television repair the middle of August. This forum is a godsend thanks for providing it.
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Re: Sanyo DP42647 back light problem
While originally written for lcd monitors, some of it applies to LCD TVs.
2 seconds to black can be
a) bad caps
b) bad ccfls
c) bad ccfl wiring (especially the return wiring)
d) bad secondary windings on the inverter transformer
More details starting with post #19 at
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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 to all
tv turn on and show logo(backlight on)than backlight turn off than red led in front blinking 7 time. the tv remote control working fine (sound on no picture).backlight changed same problem
in 65k560 how to remove protection of backlight? picture of inverter and sockets attached .
please advise me tnx05-20-2025, 07:11 AM -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Hello friends,
A yellow light was flashing on my monitor. It was like it was constantly cutting power. When I opened it up, I saw that the big capacitor in the high voltage line was leaking. I replaced it. When I turned it on for the first time, it had the same problem again. But then, interestingly, it got better. The yellow light was on steady. But the monitor wouldn't turn on. When I examined them with a thermal camera, I saw that the Fli5961-LF reached 50 degrees Celsius and the EM636165TS next to it reached 100 degrees Celsius and was drawing high current on the motherboard....11-13-2024, 07:00 AM -
Hi
I have this HP laptop, board: DA0G3DMBCE0 rev:E
The keyboard light only work, when i connect ac power supply(without battery), until the screen come with cmos checksum error. After this point light can't switch on. The first 5-6 seconds i can switch on/off light with FN+F4. When booing on, i can't switch on.
Keyb light controller Y59116, i think working, because receive i2c commands the firsr 5 seconds
I know schematic doesn't exist for this board
Someone know similar board, that use this rgb keyboard light controller?
regards
...
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