Question about Zenith IQB60M90W 60" Rear Projection Television

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Signal board Replacing A Signal Board How do you replace the large signal board?

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You shouldnt touch a tv set unless you have the know how of all the HI VOLTAGE saftey issues, just to save a few bucks!! Please leave the repairs to HI voltage equipment to the pros??. after all would you let your friend operate on you otr a memeber of your Group?? Please let the pros handle any repair issues you have. GOOD LUCK

Posted on Jun 27, 2006

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Posted on Jan 02, 2017

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I've upgraded the FW on my LG 47LE5500 and now the TV is not succeeding to start - looping reboot


Ur tv Firmware u upgraded it have corrupted files or the wrong version.Sorry ur main board tv Tuner signal board it have corrupted in it softwares or the wrong version in it CPU programming now.This problems,u cannot be undone or put the old version back.Only can repair by doing replacing a whole refurbish new tv Tuner signal board only now.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish main board tv Tuner signal board for the replacement.

Aug 30, 2011 | LG 47LE5500 TV

1 Answer

The color is distorted there is a psychedelic green around. You can see the color images ok but there is a super imposed green color on the screen. Do you have any idea on the problem do I need to replace...


The tv problems u are decribing are 50/50 it could be the main board tv Tuner signal board is dying and shorting out or the tv LCD screen panel itself are leaking radiation and slowly shorting out.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish main board tv Tuner signal board for the replacement.50/50 could get this tv fixed by replacing this main board tv Tuner signal board.If after u replaced the board and still have the same problems,than u know for sure it is the tv LCD screen is dying and leaking radiation and slowly shorting out.Than u know for sure this tv is not worth as a whole tv anymore,now only as salvages tv for it PCB circuits boards only.U can return the main board tv Tuner signal board to the dealers.Get some money back,but must lose some money,like subtraction like from the shipping and handleling cost and the useually the 10% restocking fee.

Aug 14, 2011 | Proscan 40LC45S 40 in. LCD TV

1 Answer

The Audio cuts out for a split second every 20-30 seconds.


Check the small signal boards solder connections. The small signal board is the large green circuit board on the right when looking in the rear ( Has all the inputs on it ) Famous for solder issues on the ITC222 small signal boards.slinteriors_22.jpg

Aug 12, 2011 | RCA D52W19 52" Rear Projection Television

1 Answer

I am going to resolder the flyback, but what is? and where is the small signal board?? And would that need to be replaced or repaired?


I am attaching a picture of the flyback whicch is the large transformer which is on the far left side and has the thick red wire coming out its top. The small signal board is the large green board on the right side with all of the inputs on it. The small signal board is a sensitive board and requires professional tools (Chipper Check interface )to diagnose and repair. But the flybacks are famous for failing. the flyback is circled in the picslinteriors_15.jpg

Jul 24, 2011 | RCA R52WH73 Projection Television

1 Answer

MY ORION TV KEEPS FLASHING PINK AND I HAVE FUNNY LINES ON THE SCREEN CAN ANY ONE HELP THANX ANT


Ur Tuner signal board might be dead,need replacing or the incomming coalax signal cable is damage.Take ur tv to another location plug in another incoming coalax signal cable,if u have the same problems after the tv is on about 20 mins or less.Than ur Tuner board is the cause,tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement.If the incommnig coalax signal cable is the problems,call ur cable companny.

Apr 28, 2010 | Sanyo 42 in. LCD TV

3 Answers

Projection TV, Sound but no Picture


If this Tv is a model year 1996 or 1998, It is quite possible your vertical IC needs resoldered. It is located on the small signal board. This board [quite large anyway] is the board on the left. I don't know the location off hand. The IC has seven pins and located on a heatsink, It is a TDA series. Resolder any and all grounds you see. May as well get the Large Signal board [On the right] resoldered. The other problem would be the P I P board, a small board standing up, that can be removed and replaced. But try the earlier first. This is tedious, but will produce results.

Jul 12, 2009 | Mitsubishi VS-5059 50" Rear Projection...

1 Answer

We have a Mitsubishi DLP and the timer light is flashing on and off and I cannot turn the power on or off on the TV


Bad signal board, DM module and or formatter board. Try replacing the signal board first. About 50% of my fixes with flashing timer LED was solved by signal board replacement. If this doesn't work, then try replacing the formatter board. And if still don't work, then DM module must be replaced.

Mitsubishi don't have a real answer behind these failures. I know and I've tried. Do have two of them just came in my possesion for repairs. One has same problem and just put in order for new signal module.

Nov 27, 2008 | Mitsubishi WD-62825 62" Rear Projection...

1 Answer

Signal board


the signal board is the one all the way to the left it has the one with the cable inputs ..1 to 3 (LF to RT) 1 = Signa board,2=DM board,3=FMT board....

Sep 24, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Tv fix


that is usually related to the LSB large signal board will eventually need replacement. Most repair shops will not troubleshoot the LSB at component level, they will opt for replacing the entire circuit board. If you need more info or help to locate a LSB board. please let me know.

Jul 14, 2008 | Philips 60P8341 60" Rear Projection...

1 Answer

Yes i need more help on these opto-couplers


The halo effect is due to the green and blue CRT coolant being congealed this is a common problem. Red will not have the same condition. As for the opto-couplers they are located on the large signal board in the middle of the board all lined up in a row they will have board location numbers of 7412, 7406 and 7413 . 7412 is usually the culprit the part numbers for 7412 is 9322-105-14682 7406 and 7413 are the same part number 9338-894-15682

May 15, 2008 | Televison & Video

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