Question about ViewSonic VPW450HD 42 in. HD-Ready Plasma Television

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Screen Flicker I have had this TV for a few years with no problems at all. Suddenly, it's flickering very noticeably and even flashes for a few seconds. I thought maybe it was the source but I have tried several other and it's the same, although not as often. When using AV1, the screen has a bunch of different colored pixels shown over the picture source and sometimes the entire screen turns white. The flicker shows on the two component sources but not the other symptoms. Is this TV kicking the bucket?

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3 Suggested Answers

SOURCE: TV just flashes different colors

You have entered a diagnostic colour test. With the TV powered on, hold the 'Menu' & 'Enter' together, then press the power button. Problem resolved

Posted on Sep 03, 2006

  • 271 Answers

SOURCE: viewsonic n2750w 27" turn on the tv it gets 4 different colors

if you have a reset button (might be hidden)...hit dat

Posted on Dec 17, 2008

  • 1 Answer

SOURCE: VIEWSONIC VPW505 Screen flickering

Got it. I was the 'guest' who posted that I had the same problem. Not the CTRL board as I earlier thought. It boils down to the Y-SUS board (right hand side as you face the back of the display) In the upper-upper left hand quadrant you'll find a small capacitor labelled "C70".

This is the naughty one.

You can verify this by removing the back of the display, powering up and then with a small extended flame lighter, GENTLY warming C70. All it takes is about 2 to 3 seconds and the display will steady up just like always.

C70 is a surface mount capacitor, most likely 33uf at 25 volts. Haven't confirmed this yet. Will post again when I've affected the repair on my VPW505.................

BTW: This is not something you want to attempt unless you have experience with electronics. No.....really!

Posted on Dec 30, 2008

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I have a 32" RCA LCD tv , rlc3210 power input says

Is it hooked up with HDMI cable?

If so try unplugging the HDMI cable and re plugging the cable in, sometimes those cables work loose and if they are not tight, it will cause your screen to flicker. Happens to my TV once in awhile.

Aug 23, 2013 | Flat Panel Televisions

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The picture suddenly goes off, audio still on. Coes back on after turning off then on again. Tried resetting with remote control but problem persists

Turn tv on now,have a picture flicker few sec.than died.Have sound left only?Yes,than the 2 long LCD inverter boards are dead.These 2 long LCD inverter boards help the LCD screen to have a backlight to produced a picture.Tries websites like, to buy those 2 refurbishes long LCD inverter boards for the replacement.

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Thats your midddle driver board on the botton m8.

Try the technique on this video if that doesn't work ,replace the board by with another of the same part number.Cheap to buy.Ebay.LCDTV Spares shops online

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T.V. flickering and then won't turn on at all.

Hi my name is Roety,
I can help you with your issue ,
Could be some bad capacitors on the power supply.
Other than that troubleshooting would involve visual and voltage tests 
If I have helped you with your issue
If you have more questions you can still respond
I will reply asap

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is the picture clear when on? if yes, does the screen go black after a few seconds. if yes, sounds like you need a back light inverter!

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Philips 30PF9946 D/37

You have sound but no picture. Green power light is on and NOT flashing. You get a screen flash or flicker on power-up or even a minute of screen before going all black. It is your inverter board. Common problem on LCDs (maybe more so on Phillips?). They are easy to replace (unplug-plug) and are available on the net.


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I had the same problem with the flicker. Mine was a Flicker followed by a greenish line through the screen. It got worse then after 2 months the tv stoped working the power didnt come on at all. I Im taking it to bget fixed. The guy said it has somthing to do with a burnt out switch in the unit.

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Sylvania 6842-PEM Flickering Problem

Something is breaking down. Possibly a specific ceramic capacitor on the main power pcb that has been troublesome. Usually there is just a loud pop and the screen goes dead. If the set is less than a year old it is still on parts warranty and the technician could just change circuit boards until the problem is gone.

Aug 30, 2007 | Sylvania 6842-PEM 42 in. EDTV-Ready Plasma...

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