LG 50PN6500 HDMI 1 No Signal

[Jackching]

Has anyone came across the problem of a HDMI port quitting in the 50PN6500? EAX65071307(1.1). It detects the port when the cord is plugged in but just no signal. I followed the traces to the chip then heated the chip with a hair drier for about 4 minutes with no luck. I looked at the HDMI solder contacts. They all seemed to be fine. HDMI port 2 still works fine.

[R_J]

Re: LG 50PN6500 HDMI 1 No Signal

Can you get at the hdmi plug's pins? If any of them are loose that can cause this issue, you can use a needle and a magnifier to see if any of them are loose.

[Jackching]

Re: LG 50PN6500 HDMI 1 No Signal

Can you get at the hdmi plug's pins? If any of them are loose that can cause this issue, you can use a needle and a magnifier to see if any of them are loose.

If that were the case then you'd think it would at least flicker by wiggling the cable shouldn't it?

[R_J]

Re: LG 50PN6500 HDMI 1 No Signal

If the hdmi port was bent slightly at any time, it may have bent the pins up away from the board and they won't make contact. These are digital signals so the connection needs to be made for a couple seconds before the signal gets processed.

[Jackching]

Re: LG 50PN6500 HDMI 1 No Signal

If the hdmi port was bent slightly at any time, it may have bent the pins up away from the board and they won't make contact. These are digital signals so the connection needs to be made for a couple seconds before the signal gets processed.

So if the pins are bent up, the solder connection must be broke right? Are these even solder-able? These pins are very close together.

[R_J]

Re: LG 50PN6500 HDMI 1 No Signal

I have removed and replaced them myself, but they are not easy and if you are not carefull you can damage the traces. I used a solder iron to remove the solder from the mounting lugs, then used my hot air station to remove the jacks. In my case I reused the original jacks. I had to straighten the pins (slightly bend them toward the board) so they made better contact with the traces, originally there was a slight space between the trace and the pins so the the solder would not take properly
I then used my smallest solder tip, flux and almost no new solder to resolder the pins. This was done by viewing through a magnifier so I could see what I was doing.
This is why I recommend checking the pins first, using a magnifier and a needle you should be able to see if the pins are loose or not. If they are not loose then there is no reasont to start soldering them. The other alternative would be to check the continuity between the hdmi cable and the pins of the ic the jack connects to.