Philips 42FD9944 , Blinking red light! ( Oldskool )

[Moreno83]

Hi People ,

Bought a Philips 42FD9944 for a very cheap price! ( To learn and repair for hobby ).
I did some research and i replaced ALL the capacitors in the power supply except the big blue ones , probably not necessary to replace all but just to make sure.
When i plug in the mains it goes automatically in standby and when i use the remote to turn it on i hear some clicks. The green led comes on and after 5/6secs it clicks and the led is blinking red.
Sometimes the green led stays on for a longer period ( Like 15 secs ) then it starts clicking again , stays green and then goes into the red blinking led.

1 out of 10 times the tv turns on and i get a picture.

I don't see any bulged capacitors on the Ysus/Xsus board and already tried a different main board/Tuner/Plasmascreen!

So the fault must be either in the Ysus/Xsus or still somewhere in the power supply?

I know its a "old" tv , but compared to tv's from 2014 this tv has so much components …its fascinating!


Anyone who can pin me in the right direction?

Thx people!

[tom66]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Can you supply a picture of the power board - there is a common fault on these board that requires replacing about 5 or 6 ceramic capacitors... they fail leaky and can cause this problem.

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Ofcourse i can! Will do that in the morning!

I already replaced ALL the capacitors on the power supply except the big blue ones. I did read that one 47UF Capacitor must be replaced with a 100UF so it would start ?

[tom66]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

These capacitors are little surface mount ones a lot like these:

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

I will post a picture in the morning! Didn't check those capacitors….
Btw , i got 2 of these tv's so what i have done is :

1 , changed ALL capacitors on 1 power supply. ( except the ones you describe ).
2 , changed the plasma panel.
3 , changed main board.
4 , changed xsus/ysus boards ( I don't trust them though ).
5 , checked the pre-conditioner on power supply , Voltage comes up to 400 and drops immediately to 0 ).

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Hi Tom ,

I took a picture from the power supply that i used yesterday! ( Its now missing come caps ).
I changed ALL the capacitors on the other power supply and see if this board would work.
I only get a flash on the screen and then it goes into protection mode. ( blinking red light ).

When i turn on the TV it stays in standby mode. ( Does not turn off ).

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

I read that there was a " Philips update " for this board?
There is a 4.7uf on the power supply that needs to be replaced for a 100uf?

position: 2508, 2540, 2541, 2663, 2664 replace for 100uf/50v
position: 2210 replace for 47uf/50v
position: 2113 replace for 470uf/50v

Good or bad idea?

[tom66]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Any SMD parts on the bottom of the board?

[Alastair E]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Those listed cause your problem.

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

No , the only SMD parts are the ones you see in the first picture. ( small caps ).
Gonna replace those listed tomorrow , see if that works!

Will let you guys know and thanks for the help!

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

I replaced the capacitors :

position: 2508, 2540, 2541, 2663, 2664 replaced for 100uf/50v
position: 2210 replaced for 47uf/50v
position: 2113 replaced for 470uf/50v


I still get a flash on the screen and it goes into protection.

What to do now?

[kasfamily]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

How many times blinks red

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

It does not stop blinking. It goes into protection mode!
When i remove the plug and plug it back in it goes to standby mode.

When i turn on the tv again it gives a flash and then it goes back into protection mode.

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Ok i fixed the TV! It turns on and stays on and i get a picture! Problem was a bad sound card print and a few capacitors on the Xsus/Ysus. ( 10uf's )
Think i already fixed the tv a few days back but it didn't know that it won't work with a faulty sound card.

Now im struggling to get a good picture. When i use a HD receiver in combination with the tuner ( no other way around ) using a scart cable the picture is not "good". Its good but not digital , looks more analogue .

Is it possible to use HD cable receiver with this tuner via component?
Do i need to alter something on the power board? More voltage maybe?

Any tips?

[tom66]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

This is a very early generation plasma panel (2002 or so), so I doubt it has a DVI port and the component port will only support 480i/576i/576p.

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

It would be ok if the component port supported that but i don't get a picture!
I repaired a lg rx42px11 from 2004 and it showed an amazing HD picture via component. ( Talking about the YPrPb, PrPbY en PbPrY ).
I tried the same with this tv but i don't get a picture.

I was just browsing through a thread about a samsung 50inch plasma which you replied to a lot! ( https://www.badcaps.net/forum/showth...t=18251&page=2 )

I don't get sparkles but the screen looks blurred.

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Or maybe I'm just to "spoiled" and im comparing it to tv's from now….
Altering the pot meters on the Powersupply / Ysus/Xsus won't do much?

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Hi Tom ,

I looked closely and i get purple sparkles? Its also around the contours of people's faces.

On the XSUS board i have 3 pot meters ( Possibly 4 but can't find it ).
It says RV1 , RV3 , RV4.
RV1 & RV3 are left and right on the board and RV4 is next to the power cable going into the XSUS board.

YSUS Board has 2 pot meters , RV1 / RV2.

Powerboard has 2 pot meters , bigger then the ysus/xsus boards and it only says 1 , 2 , 3 around the pot meter?

[Alastair E]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Very common to have that edge-noise on contours with these Fujitsu/Hitachi panels that Philips use.

Its the panel itself that causes the problem and is not repairable. Ive had several like this, allowing to warm up helps in some cases, but if very old/high hours the effect is still visible.

[Moreno83]

Re: Philips 42FD9944 , Blinking red light! ( Oldskool )

Hi Alastair ,

Thx for the reply! I fixed the problem. Ofcourse ageing matters and i can't expect much from a 10year old tv but i managed to make it disappear!
First i cleaned the plasma screen inside the tv , separating it from the outside glass and pfffff what a black moisture came from the screen!! :o
I then altered the voltages on the power board and Xsus/Ysus board. The ones on the power board are set on "2" ( It says 1,2,3 on the board ).
The Xsus board has 3 meters , i used the one thats near the power cable and i altered it. At 1 point the screen went black and the error led was blinking so i went to far haha , i then asked someone to look at the screen when altering and at one point it was gone. ( Dangerous i know but thank god it has some protection build in and i didn't blow up the screen ).

Even with SCART i now get a clear and almost HD picture when I'm looking at the screen from 30 cm's distance.

Im happy! I bought it for 50 euro's as a broken tv & I'm giving it away to my younger brother!! I learned a lot from this which helps me with future tv's!

Thx again!