how to identify the faulty reading on backlihgt out put only 12v
at backlight driver only input 12v present. the others pin no voltage
at backlight driver only input 12v present. the others pin no voltage
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Re: philips 32 backlight problem
Please provide the model number of the TV and good clear straight shots of the whole backside of the TV showing all the boards, and then good clear straight shots of the whole power supply board, main board, etc.. also closed up of the connectors so we can see the pin labels for each pin of the connectors.Never stop learning
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
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Hi
I have here a Philips 47PFS7509/12 LCD TV which came to me with a weird problem : without signal i could access menu, make a factory reset, access menus, etc.
When i applied cable signal to check image, i had normal picture, but TV was restarting.
I downloaded original firmware and applied the update, but the problem remained.
From a colleague i received a "factory package software" which is a lot bigger.
I made another firmware update, but still did not solve the problem.
Somewhere on the way the error got worse, because at the moment the... -
So i'm trying to replace the LED's in a Philips TV. It's 42" with a 715g7262-p01-000-0010 backlight driver board based around an O2 Micro OZ9902CGN.
My issue is when I replace all the LED's on one board with the new 3V 300ma ones they immediately burn out when the set is powered again. I previously tried the same thing with 6V LED's and the backlight flickered for a bit but wouldn't start.
The original LED's which I removed which are still working start to melt and burn when given more than 3V on DCPS so I know they shouldn't be higher voltage ones.
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I raised the question of whether PWM on the power board "dim" pin would be a reasonable assumption for controlling the backlight of a Philips TV (55put6101/12): https://www.badcaps.net/forum/troubl...d-tv-backlight. I didn't receive any insights there so I went ahead and tried it.
The setup is basically:
Rpi3 hardware PWM → 220 Ohm → NPN transistor → dim pin
Transistor is switching the 3.5 V supply on the power board.... -
Hi. I have a problem with Asus ROG GA402RK. The keyboard suddenly stopped working along with the kb backlight. I replaced the keyboard and the ITE KBC chip and the problem is still the same. I don't see any passive elements that look damaged. Does anyone have an idea?04-28-2025, 04:30 PM
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Hi i have the above tv and has backlight problem
I noticed with a flashlight that I have picture and sound when I put an antenna
My problem is that I do not have a device to test the fluorescent lamps and extend the transformer high to see which of the two is to blame and to give a solution to my problem
I was thinking an easier solution would be to turn the TV into a LED but I had done it before in another (different model) and it looked like bright dots behind the lcd panel and it was ugly
What do you recommend ?
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