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Unplug,replug the tv back about an hour later.Than go to the tv menu go to PICTURE go down to reset.The Tuner board should reset back to the factory setting,all ur HDMI ports hubs should function now,not than ur Tuner board is defective must be change.Tries websites Like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement,
Unplug the tv about an hour to let it reset itself.Replug,reset everythings in ur tv menu back to factory setting.All ur functions on the Tuner board should work again.Not than,ur Tuner board is defective,have all those shorted HDMI input Hubs.The only way now it to replaced the Tuner board.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement.
I'm working on one now. So far, I've found two capacitors on the power supply board bad, both 1000uf/16V 105 degree caps location EC9 area. Still have mild interference on the screen which seems to change with the type of video being displayed.. Will look for C301 next, is it on the signal board?
We had the same red "pixilation" problem with our new Vizio 47" set. Read within this site for our solution (posted by Cavanaju): Call Vizio and have them come out and replace the LVDS cable and the main board. They will have to order and bring in the parts, which will involve them unscrewing a million screws to take off the entire back of the tv and replace that calbe within it all and the main board. It will then be just fine! (I hope...we just had ours fixed 4 days ago and so far, so good...) Hope this works. Seems to be a factory defect they have had with this set. Good luck!
A converter box isn't going to fix this problem.
Your TV is a Monitor. It doesn't have a built in tuner. That's why it doesn't have a Cable/Ant coaxial port.
The TV needs a cable box for tuning or some other outside source box for receiving signals.
Are you using cable from the cable company or an antenna for reception?
You may have bad capacitors on the main board where the signal is processed. These caps are as labeled: c280,c323,c302 and c320- replace this one first (it usually fixes the problem) Replace these caps with 100uf @35V
To be honest with you. Do not waste your time change the main input board, your problem is solved. Because the main input board coul be defective. I can help you get the input board. Please, my e-mail Stevebuy31@hotmail.com
I had the exact same problem already and my LCD is less than 8mo old. One of the techs from AKAI told me that its a known problem and many tv's were coming back "unserviceable". They now have a "supposed" fix for the problem. I only hope it really works and its not just a "carry-over" until the warranty ends. I am beginning to think its a quality issue and the units may just be defective. Thismay be thier way of doing a quick-fix vs. recalling all those tv's. This is what he gave me to as a solution to give the serviceman when he comes to fix the LCD.
AKAI model LCT42Z6TM: If there is no image or a badly distorted image with horizontalstatic lines, usually with four boxes in all four corners of the screen, there is a possible fix for this. There are four capacitors on the main board that have been identified as the primary cause of this symptom. Replace the capacitors at location numbers C280, C302, C320, C323 - 100UF 35 VOLTS [dxh]