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Fault with main board. Damaged component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
After you are sure you have hooked up the receiver to the TV properly and with the proper setting in the menu, if you are still having problems then you need to change the main board (the one with all the jacks on it). You will have to take the back from off the set. You will have to get the number from off the board itself and it should start with BN94-. Do a search on ebay with the part number or go to shop jimmy.com for price and availability. Also try to google search. The board is easy to change just unplug and unscrew from the panel.
The tv Samsung refurbish main tv Turner signal board will set u back like $120-130 bucks + shipping and handleling and u must have to have some basic mechanicals skills like take things aparts and putting it back togther again to fixed this tv just for the used of those HDMI hubs ports again.My questions to u is?Does ur tv used 100% must require those useages of those HDMI hubs ports.Not just used the Samsung tv as is.My Samsung tv have the same problems.I just work around it by skipping all the useages of all those HDMI ports hubs of the tv altogther.Most poeple just used about like 3 HDMI ports hubs for like a HD cable box or DVR cable box and a PS3,WII games systems or Blu Ray DVD player.All these devices can go through hook up for like a RCA component cables hook up like AV1,AV2 and last one a HD hookup by a RCA component cable just add 2 more components wires like a green and purple connections or just buy a set of RCA components cable that design for a HD output.I did that,must more reliable set up too.Because those RCA components cables set up have more plastics in it connections for insulation holes for little shorts and sparks better than those HDMI ports hubs and HDMI cables barely help and the plastic for insulation is a joke almost non exiten.Those all dam HDMI ports hubs are all link into one path way on the circuit board,one dies or got shorted all dies and get shorted out.
There is a separate IC on the main board that does nothing but process the HDMI signal, basically if your using the cable, AVI or any other input other than HDMI and chances are that is bad, it can be replaced if you have a lot of electronic experience, its a $3 chip but its not easy to replace..I would replace the main board if you can find one, sometimes main boards are hard to find..below is a link to the service manual. Sony KDF 42WE655 Service Manual
No,Unplug,replug the tv about an hour later.Go to the tv menu go to PICTURE.Go down to reset,the Tuner board will return back factory setting.All ur HDMI ports will work again,not than ur tv Tuner board have that HDMI port 1 is shorted and dead.Fixing cost known,must call the yellow pages tv shops dicuss the problems and get the estamate.