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Equipment Repairs => LCD TV forum => Topic started by: saud52 on March 08, 2019,11:17:20

Title: Philips 47PFL8404 H / 12, chassis Q548.1ELA
Post by: saud52 on March 08, 2019,11:17:20

Hello everybody,

I have a Philips LCD TV model 47PFL8404 H / 12, chassis Q548.1ELA.
  My TV has the following problem: TV starts, in a fraction of a second gets a picture and a backlight. The image and the backlight go out immediately. After a few seconds the TV gets the picture again and loses it. So a few times at the start. After a few unsuccessful launches, the image and the backlight no longer come. My TV has a normal sound. Problem is in the power supply - inverter defective. ( „Delta“ DPS-298CP-A )
PSU checked, I've replaced all four of the high voltage capacitors at the output of the inverter transformers with new ones. I have also replaced IC702 = DDA003A and IC3 = DDA005, without success. I also checked the neon lights in the backlight in the panel. Everything is right. The TV still behaves the same way!
For suggestions, I would be grateful!
 :sign0085: :sign0085:

Title: Re: Philips 47PFL8404 H / 12, chassis Q548.1ELA
Post by: michael first on March 11, 2019,05:40:51

Hi.try to swap the SSB(main board) ,could work

Title: Re: Philips 47PFL8404 H / 12, chassis Q548.1ELA
Post by: Turnip on March 11, 2019,12:33:58

Hi Saud52,

Tend to feel if the back lights stay on longer when warm, you have duff tubes, maybe a little Black at the ends. Not easy to check without replacement, as the inverter will suss the issue and cut drive - Chris.