possible timing control fault with Samsung LE37M87BD

[Mikeyboy2007]

hi guys i had a problem with a Samsung LE37M87BD where it was coming on etc but colours where all inverted and stuff so i have had this issue with samsung before with the AS-15 chips on the Tcon so decided to order a new Tcon board, i replaced last night and it is still doing the same thing. could this be a faulty Tcon again as seller advertised on listing that it was confirmed working ?

[Mikeyboy2007]

Re: possible timing control fault with Samsung LE37M87BD

also when tv screen is supposed to be black or blue (cant remember) ie if you unplug source while on that channel the screen goes yellow.

[sordids999]

Re: possible timing control fault with Samsung LE37M87BD

Have you tested the Tcon Board test points ?

[selldoor]

Re: possible timing control fault with Samsung LE37M87BD

also when tv screen is supposed to be black or blue (cant remember) ie if you unplug source while on that channel the screen goes yellow.

If the source is hdmi you will wreck the hdmi controller chip doing that.
It is not pnp.

[Mikeyboy2007]

Re: possible timing control fault with Samsung LE37M87BD

ahh ok selldoor thanks for the info i didnt realise that. do that all the time aswell.... and i will test Tcon board points and post results later, thanks

[mmartell]

Re: possible timing control fault with Samsung LE37M87BD

If the source is hdmi you will wreck the hdmi controller chip doing that.
It is not pnp.

Hdmi has hot swap detect so why do you say that you can't or shouldn't do it ?

[goontron]

Re: possible timing control fault with Samsung LE37M87BD

If the source is hdmi you will wreck the hdmi controller chip doing that.
It is not pnp.

err, i beg to differ.

HPD
The HPD (Hot-Plug-Detect) feature is a communication mechanism between a source and a sink device that makes the source device aware that it has been connected/disconnected to/from the sink device. When an HDMI cable is inserted between the two devices, the resulting hot-plug detection instantiates a start-up communication sequence. The EDID information stored in the sink device gets read by the source device though the DDC bus, and the source device typically presents itself on the CEC link and requests basic status information from the sink device such as its power status as well as other devices on the HDMI chain.

http://www.ni.com/white-paper/12680/en/

[tom66]

Re: possible timing control fault with Samsung LE37M87BD

HDMI is plug and play. One of my jobs at work is to hot-plug set top boxes on as many TVs as possible.

@Mikey, I doubt the seller ever tested their boards. This fault is so common that someone may well have smashed their TV over it, hence the faulty board.

[selldoor]

Re: possible timing control fault with Samsung LE37M87BD

HDMI is plug and play. One of my jobs at work is to hot-plug set top boxes on as many TVs as possible.
.

Is that to retrotest if the plug and play works?

http://www.google.co.uk/url?url=http...oK3RcC828kbwXA

[tom66]

Re: possible timing control fault with Samsung LE37M87BD

Is that to retrotest if the plug and play works?

Yes all our boxes work plug and play. I tested nearly 25 the other day, Samsung 4K 55" LCD to 16" 720p off-brand Technika one. They all worked. They also survive very high ESD events.

[selldoor]

Re: possible timing control fault with Samsung LE37M87BD

Ok - maybe the hdmi spec has been improved on both TVs and sources
and on cables. Me - luddite - dont trust them

@Goontron - you are assuming manufacturers adhere to the specifications and controls.
There is one manufacturer in the UK/Europe who seem to send stuff out to the unsuspecting public
for testing

[goontron]

Re: possible timing control fault with Samsung LE37M87BD

Ok - maybe the hdmi spec has been improved on both TVs and sources
and on cables. Me - luddite - dont trust them

@Goontron - you are assuming manufacturers adhere to the specifications and controls.
There is one manufacturer in the UK/Europe who seem to send stuff out to the unsuspecting public
for testing

everything i have seems to comply. both HDMI capable graphics cards i have, my DVD and blu ray player, TV, sound system, etc. all comply. maybe a different story in other parts of the world though.