Samsung ln40a630 need opinion

[Mmasters]

This picture is a screenshot of what I get when I first turn on the TV. The lines are multicolored and change on the TV when the scenes on TV change. When first turned on, this lasts for anywhere from 30 seconds to three minutes, then the TV will come on with a perfect picture and remain that way until I turned it off.

I have tried tweaking the panel and squeezing with no change in the initial picture. Does it look like a screen tab failure of which I would attempt to repair or could the t con board cause this failure?

Note: I'm using an iPad to submit this thread, has anyone else had a problem uploading more than one picture at a time? I can select multiple pictures with no problem, however when I go to upload them it will only upload one picture.

[graveboy81]

Re: Samsung ln40a630 need opinion

I had that happen to my samsung tv. It's the ribbon connected to the t-con board and the main board. what i did was disconnect that ribbon and reconnected it. It worked slightly, but that may completly work for you. Then, i went to buy some electric connector cleaner spray. I sprayed the ribbon at the points of the t-con and main boards, connected the ribbon and the picture was fine.

[newtothis]

Re: Samsung ln40a630 need opinion

That to me looks like a panel failure.

[tom66]

Re: Samsung ln40a630 need opinion

I'm going to agree with newtothis on the panel diagnosis.

[Terryfictv]

Re: Samsung ln40a630 need opinion

The T-Con is only about $40.00 on eBay and it is selling briskly!
But first, clean the LVDS contacts with DeoxIT spray !

[Mmasters]

Re: Samsung ln40a630 need opinion

Thank you all for taking the time to voice your opinion, much appreciated. I'll first try cleaning and re-seating the cables and then will go deeper if needed. Will advise of results in a later post.
Thanks again!

[jason123]

Re: Samsung ln40a630 need opinion

Ok, this is a power supply IC stability issue on the main board - in my case that's BN96-08997A. Don't waste your time, simply replace one of the Power ICS (IC101) and replace the tantalum (C102) capacitor with a ceramic capacitor (47uF up to 100 uF). There is a design problem on this board, where the IC goes unstable if connected to high-ESR (Tantalum.) It should have been designed with Ceramic. Most of the times, you can just replace the Cap with Ceramic type and you won't have to replace the IC (The IC has a bottom pad, which is a pain to replace unless you know what you're doing)

You can buy direct from ShopJimmy!, the problem is if your audio is fine, then you're paying more than you need to. The repair Kit that ShopJimmy! sell includes the Audio IC and Power IC and Capacitor - still not a bad deal for $19.xx. In my case the audio chip didn't need to be replaced. The Power supply chip is MP2363DN (SOIC8N available on eBay) and ceramic caps all over the place. I don't recall what voltage rating I used, but measure the voltage across C102 and use a cap with that rating plus margin. Example, if the voltage across C102 is 1.8V, the use at least 6.3V rating (smallest I know of).. happy repairs

[ReeceyBurger123]

Re: Samsung ln40a630 need opinion

Ok, this is a power supply IC stability issue. Don't waste your time, simply replace one of the Power ICS (IC101) and replace the tantalum (C102) capacitor with a ceramic capacitor (47uF up to 100 uF).

You can buy direct from ShopJimmy, the problem is if your audio is fine, you're paying more than you need to. In my case the audio chip didn't need to be replaced. The Power supply chip is MP2363DN (SOIC8N available on eBay) and ceramic caps all over the place.. happy repairs

Is that on the Tcon you mean ?

[jason123]

Re: Samsung ln40a630 need opinion

No, sorry, that's on the BN96-08997A main card.. I know there are many revisions, but most of them have the same / similar problems..