Question about Samsung LE40R74BDX 40 in. LCD Television

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"Photo negative" picture on LCD TV.............

We have just unpacked our Samsung TV after it was shipped from USa to UK and in storage for 4 months here in UK.
It worked perfectly in USA and appeared to be fine when I set it up to cable and dvd - it was only on for about 5 mins.

however, after being used for an extended period last night - the 1st time since the move, today the screen resolution is totally wrong in places. The pixels are not stuck as the colours change - there is too much blue and when looking at the blank screen there are millions of pale blue pixels (varying shades) in vertical lines. The colours on the screen do respond to change but it is almost like looking at a photo negative - it seems to be getting worse the longer we look at it.
We have checked colour and contrast and these do not alter the fault.................

Any ideas as we are able to claim for items damaged in transit by the shipping company!

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Posted on Jan 02, 2017

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SOURCE: My Samsung LCD TV slowly flahses colours, each about 2-4 seconds


your lcd is in test mode. you may try off the power. press and hold menu + source + power on.

this should go back to normal mode.

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SOURCE: When I turned the tv on only vertical lines appeared

I talked to a Samsung support helpline and it needs to be taken to a service center for repair.

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SOURCE: I have samsung LCD tv, my tv seems to have a

Are you getting just the white glowing screen and no pictures or on screen menu showing? If that is the case, it can be the T-CON board failure or it is not getting the 5v or 12vdc feeding it from the main board.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors pictures:
Learn about bad caps:

Capacitors kit: he can make you a set of caps.
Or, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.

Posted on Jul 11, 2011

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